Your RAM is guaranteed compatible by Crucial, so unless you have a bad module that shouldn't be the issue.
Which CPU and are you OC'ing?
Got a spare power supply you can try?
From what I've seen (but rarely experienced myself), freezing and BSOD is related to either bad install of Windows (BSOD), unstable RAM, or bad power supply.
If you get the BSOD, can you post the error codes or look to see what it says? Usually it will say what caused the crash.