Would appreciate some help identifying this problem please.

Hi,
I have recently tried to upgrade my son's PC by adding a new CPU, additional memory and a new graphics card.

The machine is running a 500w power supply into an MSI 760GM-P21 (FX) motherboard. To this I have swapped out the old AMD CPU and installed a new AMD FX6300 with the stock cooler. At the same time I removed the old unbranded 4gb RAM stick with 2 G.Skill 1600Mhz 8gb sticks giving 16gb total. Updated the bios (now on 17.15). All seemed ok but I didn't run any benchmarks at this time since I was about to add a new GPU too. The old GPU was a 2Gb ATI - cant see a model number on it. The replacement is an NVidia GTX750Ti. After removing the old card I simply went about downloading the new NVidia drivers - I didn't remove the old ATI ones before doing this - wondering if this was a mistake now.

Anyway, the system runs just fine when it's not doing anything too taxing graphics. It will run through Cinebench ok and scores 420CPU / 80fps. Despite this, when I try to run 3DMark it BSOD's in the first test. I don't see any clues from looking at event logs other than the fairly broad Kernel-Power Event ID 41 critical error. Can anyone shed some light on what's going on here? I have attached a few screenies of CPU-Z tabs for background info.

Thanks in advance.
Mak.

Latest version - 335.23

If I use the AMD uninstall utility is that going to remove the motherboard / cpu drivers too?

OK so I did the AMD uninstall utility, then manually purged remaining AMD Graphics adapter oemxx.inf files as per the link. No change. I am still getting a BSOD in the first test of 3DMark. Any suggestions what to look at next?

Mak.

Just unload the NVidia drivers or remove card as well?