Corsair are old hands in the PC component market, offering a wide range of memory sticks, hard drives, power supplies and what-have-you. They’re relative newcomers, however, to the world of PC peripherals, having just launched their Vengeance line of keyboards and mice this year. We’ve already reviewed the rather handsome Vengeance K90 keyboard, which was a top-end model that offered significant value to MMO and RTS players through extra features like macro keys and good software.  Today, we’re looking at its similarly named compatriot, the Vengeance M90. The mouse shares a similar approach to the K90, offering MMO and RTS gamers something nifty through extra buttons, rather comprehensive software and top-notch specifications. Before we have a look at the mouse proper, let’s have a look at those specifications.