Windows 7 - CPU or mobo video memory issue

These are my specs:

Mobo: MSI 880GMS-E35 motherboard
CPU: AMD Phenom II X4 - 965 3.4Ghz
RAM: Kingston 8GB DDR3 (Two 4GB sticks)
PSU: X-tech 500W (yes I know its cheap, I'm working with what I have)

I Installed Win 7 x64 Ultimate, everything works fine except that when I enable aero, my system crashes and reboots. Another problem I noticed is that randomly the computer would crash when I was browsing or installing updates. I ran memtest86 and the ram is in working order. Motherboards seems fine. Used CoreTemp to monitor temperature and the processor was at 32 - 55c under low to heavy load

However, I did notice this on MSI's website that the Phenom II 965 is not supported yet the computer boots up and Windows works besides the aero issue, MSI has listed that the mobo supports up to the Phenom II X4 960. The specs of the 965 are the same as the 960 except for the clock speed, I dont see why aero should be an issue, which brings me to what I discovered in the BIOS.

In the BIOS there is an option to put the shared video memory up to 1024MB (1GB) and I did and those problems happened when I had that enabled, I currently have it set to Auto, and I have not encountered the problem as yet.

What are the thoughts on the forum?

MSI website - http://www.msi.com/product/mb/880GMS...div=CPUSupport

AMD website - http://www.amd.com/us/products/deskt...omparison.aspx

Everything is running fine.

Too much memory in the Shared Video Memory. I had it set to 1024MB manufacturer says it can only take 512MB.

Don't know why there's an option to set it to 1024MB though.