i am running a AMD Phenom II 965 BE @3.7GHz CPU and it is stable on kernel 3.7 (from xorg edgers)
Code:
me@Quantal-Desktop:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.10
DISTRIB_CODENAME=quantal
DISTRIB_DESCRIPTION="Ubuntu 12.10"
me@Quantal-Desktop:~$ uname -r
3.7.0-4-generic
me@Quantal-Desktop:~$ nvidia-settings --version
nvidia-settings: version 310.19 (buildd@litembilla) Tue Nov 13 23:04:41 UTC
2012
The NVIDIA X Server Settings tool.
This program is used to configure the NVIDIA Linux graphics driver.
For more detail, please see the nvidia-settings(1) man page.
Copyright (C) 2004 - 2010 NVIDIA Corporation.