I've heard of these reports too although I'm running a C3 stepping 965 (currently @ stock although usually it's clocked to 3.8GHz) and have been fine with 4 sticks. Here's my CPU-Z:
Do check the RAM as it was referenced in the dmp file. Sometimes it's not always clear if the bsod is driver or hardware related so a process of elimination ensues until the error is found (usually it's hardware). Another thing to consider is that a RAM slot might be bad but let's see how your results are first..