Random BSODs for the last 4 months

Alright guys,

Hope you all can help me sort this out since it's driving me crazy. Back in December of 2011, I overhauled my gaming rig with a new power supply (750W Silverstone Strider Gold), a new CPU (Core 2 Quad Extreme 9650), a new video card (EVGA GTX570 Superclocked), a new audio card (Creative X-Fi Fatal1ty), an additional 2 x 2gb of G.SKILL DDR2 800 Pi RAM for a total of 8gb, and a new Corsair case (not that this should matter). The additional ram was matched with an older 2 x 2gb set of G.SKILL Pi RAM. According to the manufacturer, the only thing that was changed between the two sets was the heat spreader. Additionally, I'm running Vista Ultimate x64.

My machine hummed along awesomely for about 5 months. Then back in May of this year, I started getting random crashes in World of Warcraft and Battlefield 3. At first, I would just crash to the desktop, but then this devolved into total BSOD system crashes. The stop messages include the following: CACHE_MANAGER, IRQL_NOT_LESS_OR_EQUAL, MEMORY_MANAGEMENT, PAGE_FAULT_IN_NONPAGED_AREA, KMODE_EXCEPTION_NOT_HANDLED, IRQL_GT_ZERO_AT_SYSTEM_SERVICE, POOL_CORRUPTION_IN_FILE_AREA, INTERRUPT_EXCEPTION_NOT_HANDLED.

-So far I've done an SFC /SCANNOW, which comes back with the corruption of a couple files every time I run it. The corrupted file is inetres.admx and inetres.adml
-I've run Memtest+ 4.20 on all four sticks of RAM, which at first yielded zero errors. However, I recently tried this again on all four sticks for 3 passes, which took about 4.5 hours) and it returned almost 1100 errors.
-I then re-ran Memtest for each of the two stick pairs. I ran 3 passes on the older and 3 passes on the newer pair. Both tests resulted in zero errors.
-I've done a System Repair from the Vista disk.
-I've ran a chkdsk, which came back with no errors.

I'm running the four sticks of RAM at the recommended stock voltage 1.908v. The acceptable range is between 1.8v - 1.9v. I've thought about bumping up that voltage to get some stability, but I'm a little apprehensive of running more power through them. I've also considered just going to a 2 x 4gb set of RAM to get away from having to run 4 sticks on my mobo. I haven't tried reinstalling the OS yet as I might just upgrade to either Win 7 or 8 on an SSD. I would just hate to be dealing with more BSODs once I did so; therefore, I want to iron this problem out now. I've attached 12 or so Minidumps from events that occurred over the last four months. Hopefully, one of you guys can spot a common thread that might point to the culpable piece of hardware or software code. Thanks in advance!!

Welcome
First we do not have any current dump reports, the most current is several months old, I do not know what happened to the most current dmp reports.
That being said, if I do not read any of your narrative, my first thought would be that this is a hardware problem. There is an ocassional reference to memory. That is all that your reports indicate.
Now based upon that information and the fact that using 4 sticks you had 1000 errors, I would conclude that this is a memory problem. In fact one failed memtest indicates memory problem and the sticks shold be changed.
My inclination is that your specific problem is that the 4 sticks do not play nicely together, which is often the case when you mix and match and do not buy all the sticks at once. The only thing that I can suggest from your post and the test results is that you test the machine using different ram.
This does not seem to be a problem that will be solved by reinstalling, Vista or any other OS.

Rich,

There are some dumps in there from 2008 that shouldn't be there, but the most recent one is from last month. Because of all the problems I've been having, I haven't been using this machine too often. Thanks for the info regarding an OS re-installation. At least that narrows the troubleshooting down a bit, I may just get a 2 x 4gb kit to see if that resolves some of the issues.

Thanks!

Your welcome
Keep us posted.