Extreme DPC Latency when gaming

hey guys, I'm sorry if this has been posted before but I'm literally at my wits end with this issue I've been having.

first things first here are my specs for my pc

Intel i7 930 @ 2.8Ghz
Gigabyte X58-UD3r REV 2.0
EVGA Gtx 460 and MSI GTX460 Cyclone in SLI
4 x 2GB G.skill RamDDR3 SDRAM 1333
Corsair 650W PSU

I have been having an astronomical amount of DPC latency on my PC for the past few months, i thought i had it licked the last 2 weeks when I installed an older Nvidia driver but alas it has started up again something fierce.

I have used DPC latency checker and while playing a game such as BFBC2, Brink, Fallout New Vegas i get upwards of 36000+ Us

I also have used the Latencymon program to try and find the culprit, and it fluctuates almost depending on what game I am playing to what driver is causing the issue with either DPC latency or Hard pagefaults

the images i have uploaded show that its my directx kernal driver causing the pagefaults, but on new vegas it would show high dpc latency being caused by usbport.sys or atapi.sys, and I have update all my drivers, I've turned off SLI and had the same issues (these reports Ive uploaded are from SLI being disabled), I have also turned off devices, etc... etc...

I'm at the point where I want to sell these parts and built up a whole new rig lol I read that the X58-Ud3R's have latency issues as well as the GTX 460s but I know of people who don't experience the latency im getting here.

If anyone has any recommendations or experience with this issue, especially with the aforementioned specs that I have, I would so very greatly appreciate it lol

Again I apologize if this has been posted elsewhere I tried searching and all I have been doing the past 2 months is searching for forum threads that could lead me to salvation for this matter. Also I apologize for the long read!

 

Looks to me like your EVGA Gtx 460 and MSI GTX460 Cyclone have different specs. Not being familiar with SLI, I wonder if this may contribute to your troubles ?
Personally, I'm partial to AMD/ATI GPU's, and I don;t crossfire, but if I did, I would make sure to use identical cards, to minimize potential problems.
Sorry if this isn't helpful, it's just what came to mind .