Regular BSOD while gaming

Hello all!

First of all here are my system specs:

• Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (8 CPUs), ~2.4GHz
• Gigabyte EX58-UD3R Motherboard
• 6GB DDR3 RAM
• NVIDIA GeForce GTX 275

Right I'm kinda at my wit's end here. For the past . . 10 months I guess my computer unexpectedly BSOD while I am playing a game. This all started last October when I started blue screening every 10 minutes or so in Civilization V, after a bit of tinkering and advice from friends I removed a stick of RAM (so that I only had 4gb remaining) and this solved all of my problems.

Fast forward half a year and I decided to put the stick back in and fix whatever problems occurred, little did I know that this would destroy what sanity I have. BSOD constantly plagued me as I gamed with little to no help from the resulting mini dumps. After running Memtest a few errors sprung up and so I decided to order some new RAM, I slotted in this new RAM and within 30 minutes a lovely shiny blue screen greated me, I ran Memtest with this new RAM on my computer and on another and no errors showed. At this point I thought it was a motherboard problem so I sent back the RAM and used Prime 95 to make sure.

Prime95 reported no errors which to be honest did confuse me, also looking back at the crash dumps a lot of old drivers were cropping up as the problem, I even tried removing a stick like I did a few months back but the errors still occurred! Because of this i decided to fully wipe my C drive and start from scratch (I was planning on doing it this summer anyway). I re installed a few games and made sure that every driver I downloaded was the most recent I could get.

This worked fine for a week or two and I ran into exactly the same problem, so I ran Driver Verifier to find the culprit. The driver DB3G.sys, the driver used for my mouse, flared up big time causing crashes like crazy. After a bit of digging around I found an old beta driver designed just for Windows 7 and installed it, this cleared up this problem however the .dll file it uses is from 2005 (you cannot get a newer version before anyone says) and the BSOD still struck.

Recently I've run every single debugging and checking program under the sun: Memtest 86, Prime 95, FurMark, chkdsk. I've defragged it and ran it safe mode countless times, checked that the all the pins inside are straight and touching what they need to be touching and read countless forum posts but I still seem to run into BSOD after BSOD. The recent batch of minidumps point to memory problems and problems with DirectX so now I'm starting to think my GPU (or its VRAM) is the culprit. However I don't want to jump to conclusions and order a new one without proper confirmation.

I've included the minidump as the forums ask, and I can gladly answer any additional questions people may have. This whole thing is really getting to me as I can't play any form of game without fear of crashing and I kinda need my computer running fine when I go back to my Games Design course at University. Any advice/tips/help would be greatly appreciated.

O and sorry for this huge wall of text (thanks for getting this far!), I wanna show how big a predicament this is and provide any details people may need without having to ask.