I was doing some benchmarking yesterday after getting my 5870's setup for crossfire and tried to do some OC'ing but with either MSI or Trixx the system would lockup/crash. Did the ULPS reg fix and started to do some OC'ing. Pushed them both up to 900 on the cores and left ram alone before doing some testing and within secounds I'd get a BSOD about the ati driver...keep in mind I OC'd my original @ 1Ghz core and 1.3Ghz on ram. Ran both cards at stock after resetting the Water block on the 2nd card again and noticed the VDDC's on the 2nd(new) card are kinda off of what the original card showed. I think something is up with the 2nd card but wanted to run this by you guys to see if anyone has had this before. P.S. Also noticed one of the R23's are really loose. Couldn't this be the culprit!?