Oops, You are absolutely correct. The system was built by my son a year ago and he used the M2N32-SLI Premium VISTA Edition motherboard. It has an AM2 socket. He is currently running Microsoft's 7, the 64 bit version. Prior to that he was running VISTA x86. I checked the asus website and there are 13 BIOS updates. One of them actually addresses the slot issue to make it AM2+ compatible. There is also a new flash tool. I believe this should fix his problem and his system should run smoothly once again. I only hope that he sees some bang for the money he has invested in the new cpu.
Well if this is the board that he has, he cannot install a 965 due to it is AM2 only.
ASUS M2N32-SLI Premium Vista Edition AM2 NVIDIA nForce 590 SLI MCP ATX AMD Motherboard - Retail http://www.newegg.com/product/product.aspx?Item=N82E16813131163
The latest Bios will only let him install AM2+ x2's/x3's and x4's. The 965 is AM3 http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us&model=M2N32-SLI%20Premium%20VISTA%20Edition