Corsair M75 Wireless Review – Premium Ambidextrous Gaming Mouse 

This is Corsair’s latest flagship gaming mouse, the M75 Wireless – not to be confused with the much lighter and £20 cheaper M75 Air Wireless – an ambidextrous gaming mouse with some interesting features, and a frankly bemusing price tag. Let’s take a look at this thing and see what it has to offer, and help you work out if you want to splash your (frankly insane amount of) cash on it… 

Let’s start with the design and shape. Being an ambidextrous mouse it has a symmetrical shape – this is kind of a compromise for both left and right handed players, but it isn’t all that uncommon, nor too uncomfortable. It’s a pretty large mouse, fitting my larger hands well, but that means I think those with smaller hands would struggle. It’s pretty long, and has a fairly high hump in the middle, making for a more palm grip preference, at least for me anyway. Interestingly, I found the left and right click buttons a little too long as I kept accidentally pressing them with the lower part of my finger – I think that comes from the shape too meaning I want to keep my finger flat on the button rather than slightly curled. That’s personal preference though. Texture wise, the M75 Wireless is pretty smooth. There’s plenty of space on either side to grip on just fine, although you can buy optional stick-on rubber side grips from Corsair themselves. Technically those are for the Air version, but as I understand it the shells are the same shape and so should fit just fine. 

Something else that’s pretty common for ambidextrous mice is the inclusion of side buttons on both sides, although Corsair has a pretty unique twist on this one. By default only the right side buttons are active – you’ll need Corsair’s desktop software, iCUE, to enable the left handed buttons – but more than that, physically the right handed buttons are pronounced while the left handed set are basically flush with the outer shell. They still do click if you try hard enough, but they aren’t exactly easy to press. That is, unless you push on the innermost edge to let them pop out, and you replace them with the opposing set that comes included in the box. You’ve got the option of going flush on either side, and pronounced on either side – or both if you want. That means you can tailor the physical design to how you’d want to use it, as well as the software side. That’s pretty cool, although it does mean the buttons feel somewhat unsupported and loose – and a look inside shows the mechanism isn’t overly well constrained. Like it’s fine, but it doesn’t feel super premium or nice.

As for glide pads, the M75 Wireless has three, one up front, one around the sensor, and one U shaped piece at the back. These are stuck down with a fabric tape which is painfully easy to rip if you need to get into the mouse – although Corsair will sell you replacement ones (again technically meant for the Air) for a frankly insane £22.99. As for how they feel, I’d say they feel pretty smooth. It glides well, especially on a softer mouse mat.

One thing that might surprise you is the weight – on my scales it weighed in at 91 grams, which is pretty hefty in today’s lightweight mouse market. The Air, by comparison, is just 60g, making this a heavyweight by comparison. Despite me using a Razer Naga Trinity as my gaming mouse of choice (which weighs an astonishing 120g), this was noticeably heavy for me. Perhaps I’m a little spoiled by the amazing mice I’ve got available – like the Endgame Gear OP1 8K I reviewed recently – but this feels like a bit of a disadvantage compared to those lighter mice. 

Something that shouldn’t be a disadvantage though is the sensor, this is a “Corsair Marksman” sensor, although a look under the 875mAh LiPo battery reveals that it’s actually a PixArt PAW3393DM – a seemingly unique model number to Corsair. It’s listed as having up to 26,000 DPI, 650 inches per second of tacking, and up to 50G of acceleration – although realistically you’re going to be using this at 800 DPI like most other mice, so that high end limit isn’t overly useful. Tracking wise, at least to the eye, feels smooth and accurate. I did notice some hitching on imperfect surfaces, so you will want to use a good quality mouse mat with this, but for all intents and purposes it’s great. In fact, gaming in general feels pretty good. The weight is something I noticed while playing, but once you get used to it, it’s pretty good. The shape did bother me, and I must admit that I don’t like the feeling of the left and right click buttons. I’m not sure if it’s because there is too much pre-travel, or the fact that these are optical switches which have a ‘fake’ click mechanism inside that just isn’t tuned quite as nicely as I’d like, but something feels off to me. It honestly feels pretty cheap – even my wife commented that it felt cheap when I got her to use it for a bit. Even the sound is a bit off. See what I mean?

While we are talking about the clicks, we should talk about click latency. Now this is only a 1,000 hertz mouse, although the slipstream wireless dongle claims to run at 2,000 hertz which in theory means the wireless connection shouldn’t be any slower than if you connect it via the USB C port on the front that you’ll otherwise use just to charge the mouse, although I believe that’s more packet duplication rather than a “true” 2,000 hertz. Anyway, being a 1,000 hertz mouse, that means the click latency isn’t quite as fast as the higher polling rate options from the likes of Razer, or even that OP1 8K – although it’s worth noting that there aren’t any over 1,000 hertz wireless mice yet either, so that’s pretty standard. Despite that limitation, Corsair has done a great job here – the optical switches help a lot – as my open source latency tool (available at OSRTT.com by the way) recorded just 2.1 milliseconds of average click latency. That’s about as good as you can get for a 1,000 hertz mouse, so good job Corsair!

Considering this is meant to be Corsair’s most premium, flagship gaming mouse, I must admit that I’m left a little disappointed by the build quality. This genuinely feels cheap. The buttons feel a little too unsupported, the sound of the clicks is off, hell even the RGB lighting is naff – even on the slow setting it just flashes constantly, which when your hand isn’t actively covering it was honestly just distracting while trying to write this script. Even the somewhat innovative side buttons don’t feel great, and dumb stuff like having to hold the power button down to turn it on and off was kind of annoying. Battery life, at least in my limited testing, was perfectly fine, and having the USB C port up front makes it pretty easy to top up when needed. The biggest problem by far though is the price tag. This is £120. This is one of the most expensive mice on the market, and this is what you get? If this was £50 it’d be fine, but for G Pro X Superlight money? I can’t say it’s for me. If wireless is a necessity for you, there are plenty of options – even ambidextrous options – you might opt for instead. If you can deal with being plugged in, and don’t need lefty support, that Endgame Gear OP1 8K I’ve mentioned a few times now is where I’d put my money. It’s £70 instead, feels better, comes with an extra set of PTFE feet AND side grips in the box for free, and like 50 grams. Seriously, go check out that video and you’ll see why I like it so much. Anyway, if you can get this on sale it’s certainly not a bad mouse by any stretch, in fact things like the click latency make it pretty good, but this build quality and that price tag make it a hard one to recommend.