I just swapped out two Opteron 6128s from a Windows 7 (with SP1) system that was running fine. I replaced them with two 6272s.
The Asus MB POSTed just fine. I got my Windows splash page, but as soon as it is about to load the desktop, it reboots.
Then it goes into the "run system repair" message from Windows. I say, sure, why not. But THAT ends up rebooting before it actually does its thing.
Then I have the computer boot from DVD to my Windows Ultimate DVD to do a fresh install. It loads, gives me the little progress bar thing at the bottom. And then JUST as it's shows the mouse arrow and is about to load the user agreement page, it reboots.
I have the latest BIOS (v2006) on the MB.
Any ideas? The computer gets through POST just fine. Seems to be a Windows problem. ???
More about :upgraded amd opteron 6128 6272 problems
For whatever reason, when I went through the bios, it had reverted the setting back to use ECC ram. I'm using 64GB or NON-ECC ram. I updated the bios a long time ago and it ran fine with the 6128 chips. Who knows why when I put the 6272 chips in it freaked out with the exact same bios settings it had before the switch.
I disabled the "use ECC ram" setting (or whatever it's called), and we're in business. Two 16-core chips are recognized in Windows and we're ready to do some major rendering with those 32-cores!