BSOD Various BCCodes 1a, d1, 24, 7e, 3b

Code:

fffff880`05491560  00000000`00000002
fffff880`05491568  fffff880`111a5fcf*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
 nvlddmkm+0x14afcf
fffff880`05491570  fffffa80`097e90b8

Uninstall the existing video driver, then run through this tutorial to clean out any remnant files:
Drivers - Clean Left over Files after Uninstalling

Reinstall the lastest driver for that card, following this guide:
NVIDIA Drivers - Avoid Problems

Now ensure that Windows is fully updated.

If you continue to experience problems, please follow this:
Graphics Card Problems - Diagnose

Im hoping its not the PCI-e slot on the motherboard thats the issue.

Brian51, It looks like you've covered your bases pretty good. If you follow Golden's directions, it should eliminate the Drivers, there is not much left but the card, which you've tried several, the PSU or the Motherboard slots. Have you considered swapping cards with another computer. Swapping with a known good card should tell you where to go next. It seems that if a known good card crashes on that computer, you are looking at the PSU or Motherboard. If your new card runs OK on the other computer, it tells you it's not the card.

Great, I hope your good luck continues. If you want to really test the card, make sure you have a good Temp monitoring program and can set a custom fan profile to keep temps down and run Furmark, Ungine Heaven and Mark 3D Firestrike. Furmark is free, Heaven is too, I think Firestrike is a trial. But those 3 will put your card through the mill, I run them all the time. I just don't trust Speedfan that much.
Video Card - Stress Test with Furmark
Heaven Benchmark | Unigine: real-time 3D engine (game, simulation, visualization and VR)
3DMark Download v1.4.828

Furmark and Heaven are pure GPU tests, Firestrike is CPU+GPU

We have a benchmark section here.

First to answer your questions the best I can. I presume anything is possible, but I have never seen a defective video card ruin a PCIe slot, but I have seen what I believe to be the reverse. What you are most likely to find is a PSU taking them both out, from a power spike or an outage. The card has 2GB of memory so I wouldn't think it could need to borrow more unless you are running some very intensive games or a multi monitor set up.

What I would like you to try is running Seatools, Seagate's Hard Drive Diagnostic test. Please run the DOS version of the test, both the short and the long version. SeaTools for DOS and Windows - How to Use

From one of your dump files from today

Code:

Use !analyze -v to get detailed debugging information.
BugCheck 1000007E, {ffffffffc0000005, fffff8000335e949, fffff880033689e8, fffff88003368240}
*** WARNING: Unable to verify timestamp for amd_xata.sys
*** ERROR: Module load completed but symbols could not be loaded for amd_xata.sys
Probably caused by : amd_xata.sys ( amd_xata+7de8 )
Followup: MachineOwner

Code:

amd_xata
start             end                 module name
fffff880`01085000 fffff880`01093000   amd_xata T (no symbols)           
    Loaded symbol image file: amd_xata.sys
    Image path: \SystemRoot\system32\DRIVERS\amd_xata.sys
    Image name: amd_xata.sys
    Timestamp:        Wed Apr 11 09:40:27 2012 (4F8597DB)
    CheckSum:         0000E9AF
    ImageSize:        0000E000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

That is the AMD Sata driver.

I may also suggest you see if you can get an updated sata driver from the Motherboard's web site, Motherboards - M5A99X EVO R2.0 - ASUS but I don't believe there is one there.

Ok, it would help me more if you posted screenshots of HWmonitor and CPUz as well as GPUz sensor tab. It is easier to read. The GPUz sensor log test is fine, but with all of these it would mean more if I knew what you were doing at the time of these logs.