BSOD - MEMORY_MANAGEMENT 0x000 and others...

I recently rebuilt a machine for home use. The motherboard is a Gigabyte P55M-UD2 Rev. 1.0, the CPU is an Intel i5 750 @ 2.67 GHz, the memory is (4) 2 GB Gskill (?) dims. All the parts are on the approved list at Gigabyte. And the machine had been running fine. I just swapped out hard drives, cleaned it up and rebuilt it with a fresh copy of Win7 Ultimate x64 and a different graphics card.
I did start out with a Sapphire HD5570 card (1 GB DDR3). I swapped to an older much generic card - thinking at first it was a video card problem.

I've done most of the usual steps. I scanned with MBAM after running RKILL. It never found any running processes or registry entries. Only some files (which I knew would be found). Since I'm trying to fix this problem I let it get rid of everything it found. I ran the MS security tool and another security tool. Neither found anything.
I ran MEMTEST+ against all 8 GB 12 times and it came up with no errors.
Strangely Speccy will not run.

I thought the problem had been solved but it came back again late this week. So here I am. I can usually get myself out of most problems (I'm a computer geek for a living - many, many years). This one is driving me crazy and doubly so since it's my home machine. I gave the wife the good old quad core that's been running like a champ! Doh!

I have never seen issues like this. I have over 100 physical machines, servers & laptops at work and nearly 100 virtual machines - all Win7 64 bit.

The BSOD happen on their own, sometimes when the machine is going to sleep, sometimes not. They also happen quite often just as I'm logging in. The last one happened in Chrome trying to fill this out. (I'm now in SAFE MODE - it's always stable in SAFE MODE).

Can someone help me out? I think I've done all the prerequisites. If not tell me what to do.
Dan

Pauly, thanks for the reply.

No over clocking. Nothing like that. I'm very boring.

I will do the virus scans -- I've already done the MS Defender online. E'thing keeps coming up negative. But I will run again.

I did Memtest -- ran all 8 GB 12 times -- took forever. Nothing came up.

I just followed your directions on entering system specs and it should all be in there now.

I will run the hard drive test.

I will report back on the HD test and virus scans.

Virus scans showed nothing.

I did the hard drive test (WD offline test) and it came up empty on both drives (I have (2) 500 GB drives, one system one data).

I will try the video card test next.
Is there a utility to make sure I don't have any "extra" video card drivers hanging in there? A "cleanup" utility for ATI video cards?

OK, here's where I'm at now.

I did the "cleanup" on the video drivers and it found a BUNCH of stuff.

I rebooted, installed the video card stress tester (Furmark) and it won't run. I suspect probably because this card that I have in there now is so basic a card.
(Error: Could not intialize ZoomGPU. FurMark startup failed. Bye!)

When I first got on my machine tonight the screen would 'blink' and I got two or three 'AW Snap!' in Chrome as well - which usually preceded a BSOD.

I'm running now after the cleanup and don't notice any blinks or Chrome issues...

I haven't had any BSODs the last few days but I have no idea why not...

What do you suggest I try from here?

Hold up. I don't really have a driver installed... DriverSweep took off the "real" driver...

I haven't spent a lot of time with this machine. For some reason now it has no driver - just a Windows driver and the 2nd video port is showing up as no driver at all.
I reinstalled the video driver for this card and it still didn't work.
Tonight I just left the machine on and it BSOD once and then when I came down to shut it down it did it again.

I'm including the latest logs. Hoping something will jump out at you.