Hey there,
Just started playing Crysis 3 and its a pretty fun game, except that I freeze out every 2 or 3 multiplayer games and forced to CTRL-ALT-DEL out of the game.

I am not running an overclocked machine, and I am running all settings on Low and getting approx 50-60 FPS. I also edited my autoexec.cfg file if that is of any concern.

Here's my machine:
Intel i5-3450
8 GB RAM
XFX Radeon HD 6950 2 GB

Thanks for the help!

Mines been freezing up too. Not as often as yours, though it's still very annoying at times.

My video drivers keep crashing.

I've been experiencing the same issues and I may have been able to stabilize it by raising the voltage amounts in MSI Afterburner for the Core Voltage and the Memory Voltage. I have a Radeon HD 7970 and I've set the Core Voltage to 1.169 and Memory Voltage to 1.65 and I haven't had a crash since, so I hope that this info might help some of you experiencing the constant crashes. I actually read about this same issue in another thread, so evidently there are a lot of people dealing with this same issue. I do believe raising the voltage amounts far enough does help to stabilize it though. I'll post again if I incur another crash. Good luck!