GPU not working after upgrading CPU to i3570

[acw77]

After upgrading CPU from i5-2500 to i5-3570 on my ASUS Maximus IV Gene-Z, my NVIDIA GTX 570 is no longer detected. The GPU seems to be powered -- its fan is running and my monitor is plugged into its HDMI port. I can start my computer and get to my desktop fine but the resolution is now restricted. My BIOS is 3603 (flashed via EZ Flash Utility2) -- the requirement for the i5-3570.

GPU not detected in Device Manager, not even in safe mode. But in BIOS, "Extreme Tweaker"-->"GPU DIMM POST" shows "PCIe x16 #1: nVIDIA GPU, running at x8 Native."

I set my motherboard BIOS to use the PCI-E as my primary video device rather than the default "Auto," saved, restarted. Didn't work. Spent a dozen or so hours Googling & troubleshooting -- found no solutions (already viewed related thread: http://www.tomshardware.com/forum/382076-33-working-ins...).

Tried re-seating DRAM in every permutation imaginable. Didn't work.

NVIDIA GeForce Experience shows a driver version: 331.65 under "My Rig," but no GPU detected through there either.

lspci output from Linux USB boot shows my GPU. So it's probably a driver issue. Any ideas? I'm desperate.

Aside: Bought a new copy of Windows 7 Pro 64-bit (current version is OEM and I am switching to a SSD) that will arrive on Nov. 20 so I'll try a fresh Windows install then.

Specs:

Windows 7 64-bit Pro
750W Corsair PSU
4x4GB Corsair RAM

Thanks in advance.

[Chino]

Welcome to the ROG forums, acw77.

Uninstall the NVIDIA drivers. Clear your CMOS. Reseat your GPU. And reinstall the NVIDIA drivers.

[HiVizMan]

How did this turn out guys?

[acw77]

Thanks for the advice, Chino. Luckily, I was able to solve my problem with a different solution. My update for future reference is below:

An Intel rep reports that there have been other cases where an upgrade of an Intel CPU from a Sandy Bridge type to an Ivy Bridge type resulted in GPU recognition problems (https://communities.intel.com/message/212878#212878). The solution that worked for me involved rolling back my NVIDIA graphic drivers to version 327.23 (WHQL) from 331.65 (WHQL). My GPU was immediately recognized.

The settings for other relevant variables: My Asus Maximus IV Gene-Z motherboard was already running BIOS 3603, the required version (also the most recent release available) at the time of this writing, in order to accommodate the i5-3570. I also was sure to set my primary display adapter to “PCI-E” rather than the default “Automatic.” I did not clear my CMOS, reseat my GPU, do a clean Windows install or re-install Intel chipset drivers at any point.

Good luck to other troubleshooters with this problem. Hopefully, my solution works for you as well.

[HiVizMan]

Thank you very much for taking the time to report back I do hope this will help others who find themself in the same situation.