Toribash
Took you seven minutes to download and install drivers. O.o

You need to install them by running the setup app, by the way, and restart your PC once it's done. (Not trying to patronise you, just making sure)

Also, open the Task Manager (Ctrl-Alt-Delete) and go the the Performance. Note the "CPU Usage" and "Commit Charge" percentage bars with Toribash closed, then note the differance with Toribash open.

Edit: * Threevil is late
"Call yourself alive? I promise you you'll be deafened by dust falling on the furniture,
you'll feel your eyebrows turning to two gashes, and your shoulder blades will ache for want of wings."