Razer Lachesis Gaming Mouse

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There’s all sorts of mice out there today, and you’ll find that none of them are created equal, they all have pros and cons, and it’s really going to take a bit to find the one that’s right for you. Razer is a company that is well known for their top-quality gaming accessories, many people rave about them and covet their Razer products. If you’re a gamer, then most likely you’ve heard of Razer and probably own one of their products.

Today for review I’ve got the Razer Lachesis gaming mouse, it features a 4000dpi laser sensor, 32kb onboard memory to save profiles, nine buttons, one the fly sensitivity adjustments and many other features that make this an excellent choice for a gaming mouse.

First up, as usual, we’ve got the unboxing video for you, so check it out and continue on:


Razer Lachesis gaming mouse

4000dpi Razer Precision 3G Laser sensor
The Razer Lachesis  reigns supreme with a true 4000dpi 3G Laser sensor, which enables movement speeds of 5 times that of a standard 800dpi optical sensor

32KB Razer Synapse onboard memory
With a 32KB onboard memory, you can store up to five unique gaming profiles.

Nine independently programmable Hyperesponse buttons
The Razer Lachesis allows programming of button functions while Razer’s Hyperesponse technology reduces latency for optimum gameplay.


*  4000dpi Razer Precision 3G Laser sensor
* 32KB Razer Synapse onboard memory
* Nine independently programmable Hyperesponse button
* 1000Hz Ultrapolling / 1ms response time
* On-The-Fly Sensitivity adjustment
* Variable true dpi setting adjustments in increments of 125dpi
* Always-On mode
* Ultra-large non-slip buttons
* 16-bit ultra-wide data path
* 60-100 inches per second
* Ambidextrous design
* Scroll wheel with 24 individual click positions
* Zero-acoustic Ultraslick Teflon feet
* Gold-plated USB connector
* Seven-foot, lightweight, non-tangle cord
* Approximate size: 129mm (length) x 71mm (width) x 40mm (height)

Windows 2000 / XP / X64 / MCE 2005 / Vista / Vista64
Available USB port
CD-ROM Drive (for drivers)
At least 35MB of hard disk space (for drivers)

Price: $ 79.99

Here’s size comparison with the Lachesis next to the NZXT Avatar and SteelSeries Ikari Optical:

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You can use the Razer Lachesis without the software, but it’s highly suggested that you don’t as with the software you can fully configure everything to your own personal likings, there are many options to choose from and you can store them in separate profiles as well.


I used the Lachesis with plastic, glass and cloth mousepads and had no problems with tracking on any of the surfaces, the plastic pad is a SteelSeries S&S and the Lachesis slid across it like it was on ice, I was amazed the first time I tried it out. The teflon pads on the Lachesis truly are silent as well, the S&S has a fine rough surface to it and I couldn’t hear the Lachesis at all sliding across it.

The Lachesis is a rather large mouse, especially compared to the small NZXT Avatar that I’ve been using, and it’s not so much the size but the height of it really that bothers me, it just feels to high in the back to me, but that’s my personal preference.

I gave the Lachesis a go for two weeks, and the verdict is that it’s a great mouse, but just not for me, I’ll be going back to the Avatar. It’s just the size of the Lachesis that doesn’t work for me, I just don’t care for a mouse that fills you hand what seems almost too much.

I did update the firmware and get the new drivers, but I found that at times the Lachesis can bit a bit jittery, and honestly it’s rather annoying when it doesn’t do what I want it to do. Those times are only when I’m using the mouse for my everyday things though, in gaming I didn’t notice it at all, so it does make a great gaming mouse, just, depending what you do, not that great of an office mouse. Sure it can be an excellent dedicated gaming mouse, but I personally use the same mouse for everything, and that’s what I like, I’m also not a hardcore gamer either.

I played Fallout 3, FarCry2, C&C Red Alert3, and Dead Space with the Lachesis and as I mentioned it is an excellent gaming mouse, it worked perfectly for any type of gaming.

I like the ability to change the DPI on the fly, it comes in quite handy, actually all of the options come in very handy, you can easily program several profile for different games.

Image Gallery:

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The Razer Lachesis is an excellent gaming mouse that I believe any hardcore would just love, it’s got tons of features and the ability to save several profiles for different games is something that any gamer will appreciate.

The Lachesis though is just that, a gaming mouse, and it seems not to be the greatest everyday mouse, I personally prefer a mouse that I can use for everything I do, and to me it seems the Lachesis is a bit jittery when using it for slow motions like copy and paste etc.

Very sensitive
Lots of adjustments
Very slick feet
Works equally well on all surfaces
Easy to use

Oddly shaped
A bit jittery at times


  47 comments for “Razer Lachesis Gaming Mouse

  1. sep
    November 14, 2008 at 10:09 am


    you have to turn off mouse acceleration in drivers and (prefferably) in windows to make the most of the desktop day-to-day mousing from this mouse. Just a hint 🙂

    • ToeringsNthongZ
      November 11, 2010 at 4:16 pm

      there is no acceleration settings in mouse for windows 7 dummy its just says enhanced setting !

      • MacIrish
        February 10, 2012 at 5:54 am

        I would love to update the firmware.. it wont even update… tells me to unplug it and replug it again. I have tried every USB port. the config screen lets me choose my buttons, but after hitting apply / ok .. none of the buttons work how I put them. I tried all of the fixes on the support forum, put button 3 as #3 on keyboard 4=#4… etc, opened note pad, nope.. none of the asssigned buttons do what I want.

        I DL latest drivers/ firmware. have rebooted. installed/uninstalled.. at least 7 times. The mouse works as a regular mouse, but I bought this being left handed to use buttons as I need…

        Nothing Works right

  2. Enz0
    November 14, 2008 at 8:02 pm

    I own a Lachesis Banshee Blue and all I can say it’s… wow.
    Yes the acceleration in windows it’s a bit enoying.You have to disable it to enjoy the pure accuracy of Lachesis.It took a month for me to get used with this mouse, but now… dunno if I can play a shooter with a normally shaped mouse.
    Best regards to the team Razer.They have good quality products(PS: I also own a Lycosa…and I enjoy every day i am using that KBD 😀 )

  3. sep
    November 14, 2008 at 9:04 pm


    lower left corner, where is says Acceleration On, you should turn that off and try it then 😉 also, try getting aeon accelfix. That’s where jitter comes from I think..


  4. patrick
    January 11, 2009 at 1:34 am

    razer lachesis is a bad idea to buy. It s**k so hard that I will never tell somebody to buy it. D’ONT BUY IT EVERYONE. Alot of problem will comme and I’m not the only one who think like me. don’t buy it or you will be disapointed.

  5. patrick
    January 11, 2009 at 1:36 am

    but just the lachesis, other product are very good and I recomande it for gamer Razer is a good compagnie

  6. rashad
    January 28, 2009 at 6:14 pm

    the guy above my messege cant even friggin spell, would you really trust his judgement, i use mine at work! its wonderful for multitasking with customers

  7. WaRLoRD
    February 1, 2009 at 7:48 am

    i don’t personally own one i am buying one soon non the less… and yes rashad the guy above you (patrick) spells company as “compagnie” i in no way will even consider he’s judgment i bet he just got a lemon that got damaged in shipping… and i bet he never heard of warranty either so yeah i cant comment on the mouse other then i think its really good and ill find out soon 😀

  8. Matt
    July 20, 2009 at 7:58 am

    I own one its excellent no prblems.

  9. breech
    October 8, 2009 at 1:28 pm

    Lachesis drifting/ accuracy problems:

    The laser head is being flexed under pressure. Put your mouse on a solid grippy surface (wood) and press down on the top. The cursor will drift northwest every time. I will be returning this mouse and sticking to my copperhead which only slightly drifts north (which I have leant to compensate for).

  10. mbianx
    December 15, 2009 at 3:46 pm

    1.Tracking Issues
    2.Driver updates have NOT fixed all tracking problems
    3.Why bother with the hassle of searching for a driver of a product you just brought for $100 or what ever you might have paid.
    4.Go get a $50 MS Mouse and it will prob work better, or even get the $250 MS revolution mouse if you have cash to burn; as this lachesis mouse is a peice of shit and im going to throw it at a wall in a minute.

  11. Someone
    January 9, 2010 at 8:34 am

    Had a diamondback for quite a few years, never had any problems with it. Had the lachesis a few weeks and was used to it instantly, never had any problems with it either. You are either used to using other shaped mice so you hold it wrong for what its designed for, or you need to update the drivers.
    “Why bother searching drivers blah blah” It takes like 30 seconds to find the drivers, download and install. You wouldnt spend $2000+ on a computer and expect to never need to download drivers for it since you paid that much. The problems are with windows, not the mouse. Hence why you should download razer drivers and it makes those problems go away (Which i never had any problems anyway but all reported ones are fixed with the drivers)

  12. Kristoffer
    January 20, 2010 at 3:42 pm

    Mine has worked good for like 6 months and now I got problems with the mouse pointer don’t move at the same pace as the mouse. If I move the mouse at a constant pace the mouse pointer while not move at a constant pace and suddenly the mouse pointer can jump a couple of centimeters…
    The mouse had issues with the windows 7 standard drivers but installing the Lachesis 1.10 just made the problem even worse.
    Have tried it on three computers so I guess the mouse is faulty.

    Have mailed Razer support last week without a response, mailed again today.


  13. Johnny
    March 1, 2010 at 3:12 pm

    This mouse is junk. The pointer is CONSTANTLY jumping all over the place. And when it’s not jumping, it’s just not moving at all..

    A bad buy.. I’ve had better performance with a 10$ mouse..

  14. Peder
    March 4, 2010 at 2:05 pm

    Absolutely@Johnny & Kristoffer…myne does the same shit…it’s really a damn expensive piece of equipment…and the juice is not worth the squeeze here… When i unplug the mouse, and plug it back in, it works fine for about 2 min, and then all goes crazy…

  15. hombrez
    March 13, 2010 at 8:48 am

    Ive had the lachesis for about a month or so now, previously used the 3G diamondback, took a little time to get used to the new shape. now that ive gotten used to it, i am liking it, however i am experiencing on the off occasion wat johnny has described above… and it is indeed very very irritating. when it is playing up, and i lift the mouse slightly to move it back to the center of my mouse pad it and the cursor suddenly dives to the bottom of the screen, sometimes it also stops moving left and right which then it will require u to disconnect it and replug it in, it also sometimes randomly changes my DPI to different settings, i dunno if im doing something wrong, but ive disabled all the dpi changing buttons, but it still happens. although it sounds like im against the lachesis, what ive said only happens once in a blue moon, but at those times it causes massive rage and QQ on my part.. has anyone found a fix to this or an explanation to why this sometimes happens? was a pretty pricey purchase and i dont wanna be replacing it any time soon because the problems become too frequent

  16. I own one for real
    April 12, 2010 at 9:08 am

    I would strongly suggest not buying it. Because I own one, I feel that the buttons on Diamond Back clicks better despite the low DPI, and there’s a serious issue in the Lachesis that the mouse cursor jumps to upwards or leftwards, it would occur even when you’re on low DPI settings. Despite the promised fix by Razer team in their firmware updates and even the latest edition does not solve the problem. The jumping issues always occur (to me) when I am trying to do precise mouse movements like sniping a target in a FPS. They never worked to release any other fixes for sometime, the mouse just keeps selling and producing victims who thought the Lachesis was a good buy until they got their hands on it.

    And also, the Razer Support email, they don’t really answer your questions as they don’t bother reading in detail what you’ve written. I would give thumbs down despite the fact that I enjoyed using Diamond Back.

    -Just maybe, the “First” in something isn’t always the greatest, in this case it’s the first 4000DPI laser mouse or so I heard/read.

  17. joejoeejeoeoeoeo
    May 4, 2010 at 11:04 am

    Lachesis is great. I bought mine recently and i’ve been gaming with it for about 2.5 months now. It does drift a bit, but to fix that problem you’ll need an imagless mouse pad. I bought the razor destructor and i get no more drifting. Razor teflon mice work best with hardpads.

  18. Kveldulvkulto
    June 8, 2010 at 7:45 am

    I Had a nagging issue with having to plug and unplug my new Razer Lachesis. I have windows 7 ultimate 64 bit. I finally resolved it.

    First i uninstalled the driver for the mouse. Restarted

    Download the latest firmware & driver updates from Razer.
    Ran firmware update in compatibility mode Xp Service pack three. Also noticed unblock. Unblock.
    Firmware updated successfully.
    Then i installed the Windows 7 driver . No compatibility mode required. But i unblocked.

    Work perfectly. I did restart 3 x to make sure. Hope this helps anyone that may need it.

  19. lee8372
    June 15, 2010 at 4:20 pm

    I’ve had the Razer Lachesis since december 2008, I started having problems with it right away. At first, it wouldn’t work after my computer was rebooted. I would have to unplug it and plug it back in. Now it’s to the point that when I reboot my computer all the buttons work except the pointer does not move. I have to literally restart my computer 5+ times then it will finally work. I’ve uninstalled the software reinstalled it and I’ve installed the drivers… I guess my only question is, Is my hardware just dying or is it a driver problem? also I have vista… not sure if that makes a difference?

  20. Dustin
    June 17, 2010 at 3:03 am

    I just opened the Razer Lachesis one hour ago and it worked for 5 mins great. Then the cursor just stoped responting and I could not navigate the mmouse anywhere on my screen, yet all the buttons right/left mouse buttons side buttons and scroll wheel work just fine. I am installed the newest drivers on thier site 1.10 and still having same issue. I could not update the firmware because it has to be updated running windows vista or XP and I am running windows 7 so that wont fix my issue either unless I downgrade my OS which I wont do.(and its home so no i cant run in XP mode). I am awaiting a email from tech support which seems to be the only way to contact them unless you are wanting to buy thier product. If I dont hear back from them soon I will probly return the mouse and try another hoping the issue doesnt repeat itself and if so I will never buy another Razer again. Kinda disapointed after hearing the good reviews on this product, hoping this is just a fluke.

  21. Seb
    June 19, 2010 at 3:29 am

    All the peeps that have trouble with jumping coursor:

    Remove the sticker thats around the laser… DONE…

    also make sure u have newest firmware and drivers… ofc…

    • Sx50ato
      January 19, 2011 at 2:56 am

      Cursor doesnt move at all son

  22. Gaud
    June 24, 2010 at 12:57 pm

    Removing sticker does not help with most issues people are posting. My razor is fucked up as well. Avoid this thing.

  23. edmond
    July 1, 2010 at 6:44 am

    A have a problem with this Lachesis. The cursor wont move. Wi’ve been using it only 2 days. I tried every move but nothing. It won’t move. Can anybody give me a soluton ? (*)*T?ª?k Y=-?U*(*) 😀

  24. tzo
    July 7, 2010 at 9:59 am

    hey… i was friend with my lachesis for 7 months but now… i have this problem:

    The mouse itself will move the cursor, but once I click any of the mouse buttons, the mouse freezes, it glows several times, the cursor won’t move, and then it will start working again after about 15 secs. The cursor will move but once I click it again, the same thing happens

    I-ve tried also home and at work… nothing.. i-ve mailed the tech supp… waiting for their reply…

  25. ch1mulobaby
    July 24, 2010 at 8:56 am

    Same problem with lee, dustin, edmont and tzo. The strange thing is, why is this happening just around this time? I never had a problem with my mouse for 2 years now. Purchased it back in 2008. Then, now even new units have the same problem as mine. If anyone has a solution for this, please inform us.

  26. Readee
    July 25, 2010 at 11:50 am

    Hi…yep same problem with the lachesis. Iv had it for about 1 1/2 years and its definitely had its skipping problems but with some tweaking here and there and messing with setting and installing drivers I managed to soldier through (the 9 buttons are worth it and im left handed so need it to be ambidextrous).

    BUT…Windows 7 64bit with latest firmware and 1.10 drivers…it skips like bugggery after a few mins of playing a game then the cursor stops all together. All buttons work fine but no cursor movement. I thought it had died but a few days later i tried plugging it back in just to see…and it work smooth as silk, until i played Metro2033 in steam for 20 mins and same problem.

    I thought it was hardware but judging from you guys gettting the same probs at the same time i would say its razors crappy drivers. geez they need to hire some coders and testers that are not total morons. £50 f*cking quid this thing cost me.

    No other 9 button ambidextrous mice out there though so what can i do??

  27. August 20, 2010 at 8:43 pm

    this has always been my mouse of choice till i bought this replacment one.. the first one i owned use to run into this also but not as much. your mouse will stop skipping like it’s reading bad then will stop moving all togther u can use the buttons and u can use the scroll but if u use the mouse it wont’ do shit ( yes clean it will be the thing u all think of but that don’t work) u have to unplug and plug back in your mouse repeatedly to get it to work again or restart your computer. i don’t know what causes this but its’ a pain in the ass. thsi new lachesis does it almost daily my last one did it maybe every couple weeks. i’m sending them sapport tickets and so on and they seem to have no clue what it is either but reading around i see that alot of other people are having an issue with it. had has to do something with the driver of the mouse it’s self

  28. drakeous
    September 1, 2010 at 7:13 pm

    Same problem that all people. Yesterday i bought it and perfect. Now, 1 day later… buttons are ok but it doesn´t move!!
    I´m left handed too and i decided to buy it but…. holy shit

  29. hanz
    September 2, 2010 at 4:45 am

    tried all the step,
    update driver 1.10 and firmware 1.94
    but it still wont work,
    just purchased 3 days ago…
    please help

  30. Benjamin
    September 2, 2010 at 10:45 am

    i bought my lachesis for 1 month already it was very fine until yesterday midnight
    it suddenly move abit by bit but later it does not move at all only respond to clicks but will not move at all any solution same as Drakeous the rolling also moves

  31. drakeouss
    September 2, 2010 at 10:32 pm

    For all, DON´T BUY THIS MOUSE. I have seen reading many sites and many people have same problem but there aren´t any solution.

    I tried plug and unplug, reboot my pc, clean sensor, other PCs, install and unistall drivers/firmware, different USB and always the same shit.
    This mouse have several serious problems from manufacturing, so if you can RETURN it fast and get your money make it.

    If you don´t beleive me search like me about it. NO solutions, BEST CRAP MOUSE of Raizer. I will never buy one from this company…

    GL guys // An angry spanish gamer here.

    • Trevorheistand
      February 12, 2011 at 12:34 am

      DO NOT buy anything from razer, 3 mice and 1 keyboard in, and NONE have been worth the hard earned cash i’ve shelled out for them, i first bought the razer copperhead, which worked amazingly well for everything for a whole month, then the laser took a shit in it, and they wouldnt replace it. second i bought the lechesis mouse and the lycosa board, the mouse jumps and hops all over, and there arent any fixes for it that i know of…and the keyboard, aside from the touchpad is awesome, the touchpad died on me after 3 months, so i can no longer dim or do anything aside from use it as a regular keyboard. Avoid razer at all costs, just go buy the g12 series logitech…MUCH better peripherals.

  32. hanz
    September 5, 2010 at 12:01 pm

    yeah, dont buy this mouse….
    wasting time and money 4 this crap..
    goin to return it..

  33. JoeBlow
    September 6, 2010 at 3:34 am

    I’ve had the Lachesis for over a year now. I use it for online poker and have lost more money from the drifting and misclicks than for what its worth.

    I the driver update v1.94 helped quite a bit but precision slow movements drive me crazy with the drift & jumps.

    My finger tip area is worn out and hade to put a band aid on it …pretty ghetto eh?? lol

    Only thing I liked about it was the shape (small hands/not small u know what tho) lol…and the cool blinky lights.

    Well just dumped it and bought a Logitech G500 ..which is much better with movements but could use a higher DPI (only 2000).

    I would not recommend the Lachesis.

  34. DeeWite
    September 21, 2010 at 4:56 pm

    When this mouse works, it suits me fine despite the normal size/shape complaints which are due to MY limitations and would have been noticed by using one before hand.
    I have owned this mouse about 1 month– Win7 64 bit. I have updated the drivers and firmware several times in an attempt to fix possible bad downloads but I still have problems with the cursor being frozen on bootup at times plus episodes of skipping or freezing momentarily during use (not a happy situation in virtual combat) which would seem to be one of the primary errors to be addressed in the development of a gaming mouse. The workaround I found was to plug in my old MS Sidewinder and use it to shutdown (instead of computer restart button). The Sidewinder was as solid as a rock (plus had VERTICALLY stacked buttons on left side) but I wanted more buttons and speed for gaming– MISTAKE!!!! Being deceived by Razer’s rep (my first Razer mouse) I bought into the Lachesis promise. The cursor is quite shaky as reported earlier but not noticable during game play where is skitters about anyway, the whell will frequently not scroll in default setup and I can not get the left button assignments, as forward and back, to work when I change back to a default “everyday” slowed down setting. The programming environment is not very intuitive either when it does work. If I had seen this site and the overwhelming amount of complaints before purchase I would never have bought a Razer mouse of any kind. I do not expect to ever buy another Razer product since I now realize that this is a product of AMERICAN gamers’ concept, CHINESE design, typical CHINESE inattention to detail, CHINESE manufacture and modern AMERICAN marketing duplicity being sold at a price that far exceeds its worth. I have been using computers heavily both at home and at work since the mid 1980s using Logitech or MS mice which always exceeded my requirements with very, very few problems.

  35. Asdasda
    October 22, 2010 at 7:11 pm

    A Pro Gamer’s opinion:
    I’ve been using the Razer Lachesis for almost 2 years now. I’m a Claw Grip style gamer, and my palm is about 2cm away from the back of it. So i disagree with this article in that its too big, but I have pretty long fingers.
    I have experienced no drift or misclicks at all with this mouse. I use it 98% with their Destructor mouse pad and have zero problems.
    I find this mouse to work very well for me, and I’m a bit of a mouse snob.
    That being said, I’m in the market for a new mouse.. I want to find something even bigger, approx 2cm longer. Not sure if they make a mouse like that anywhere though..

    I have CPL, WCG Grand Final and probably 20 LAN Tournament wins under my belt.

  36. Simon
    November 7, 2010 at 1:26 am

    I have a Lachesis, it works perfectly in Winders 7, and it also worked perfectly in Vista.
    Even though gamers don’t use Linux much… it works perfectly there too !!!

    The only problems I have encountered have been due to dust and cat hair….
    It’s incedibly sensitive to dust…. some-times the mouse seems completely dead, other times it jumps all over the place.

    It’s always DUST….. people need to stop playing and clean their work/game spaces !!

  37. Sammyboy
    November 8, 2010 at 9:21 pm

    Temporarely solution until the company fixes the issues or u get a new mouse is to uninstall its drivers and just reboot ur windows or whatever OS and windows will just rekodnize it as a standard mouse. Atleast that way you can use this crappy mouse again… Cheers and beware of 2012…

  38. Wilma245
    November 11, 2010 at 3:57 pm

    works on glass ,excuse my language ,but your a F U C K I N lier ! any laser wont work right on glass,so get your fathead out of your ass and stop the bullshitting ! i should know about this mouse i have two of them the other is a deathadder !

  39. SnakeDoctor
    February 28, 2011 at 12:05 pm

    Just want to add my voice to the chorus of people saying dont buy this mouse.

    I got it, had the problem which people talk about here where you lose cursor movement but everything else is fine. Updated firmware/drivers. No improvement. Contacted Razer, they act like no one has ever had the problem i experienced and make me go through a huge list of tests. Once none of that works they tell me it must be a faulty one and to return it to the retailer.

    So i do and i get another one and it does the same thing. I think fuck i must be the unluckiest guy on earth two get two faulty mice in a row from the top quality razer products. So i return it again. Store chick goes mental tells me i have a faulty USB and they wont replace it any more.

    So i keep the third one boxed until i get a new system on the off chance she is right about my USB port (even though other mice work fine and the USB port works fine with other shit in it) until i get a new system. New motherboard, new power supply, new everything.

    So tonight the third one of these motherfucking pieces of shit breaks down on me. What a piece of crap. I have got out my old $10 microsoft mouse which has outlasted 3 of these razer pieces of junk. I will research more carefully before i buy another high end gaming mouse and it most definitely will not be from Razer.

    I hope my experience saves you wasting your own time/money. STAY AWAY!!!

  40. PO-d at razr
    June 20, 2011 at 5:25 pm

    I’ve had nothing but problems with the Lachesis on 2 different machines. It also causes a high pitched whine from my desktop. Windows 7 contstatnly forgets the lachesis driver and just like others here, Razr pretends they’ve never heard of such things when I contact them.

    I updated teh drivers and firmware and the problems are the same. The mouse never performed any better than the $15 mice you get with systems for free. Actually the $15 mice are better since they actually work.

    Both my XP machine and WIndows 7 machine have problems with the Lachesis. Exact same problems everyone else is having. What does that tell you?

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