FTW420 should be listened to for sure. (Check the results for the latest OCN OC challenge in Toronto, grats FTW!!!) 
I read thru this thread and noticed one omission. The RIVE has a "Rampage Tweak" mode which controls how agressive it tries to set the secondary and tertiary timing for RAM. Raja over at ASUS has admitted that sometimes the board gets it wrong. What I have been doing based on that info is to boot the machine with Rampage Tweak mode set to "1" (compatibility) mode. Save and exit and right back into BIOS to input all those timings it came up with manually. Once I've done that, I set it back to AUTO then it's good to go. This method rules out RAM timing drift. One could even go so far as to disable "MCH Recheck" on the same page once you are stable to your satisfaction.
Having said all that, everyone please ignore the following:
Have you noticed there is no 5GHz SB-E Linx/prime stable club ? Passing Linx or prime means nothing on SB-E. All it really means is that if every computer in the world blew up but yours, and we needed the next prime number to ensure man's survival, you'd be a hero. Other than that, run AIDA64 stability test, much more realistic.
I read thru this thread and noticed one omission. The RIVE has a "Rampage Tweak" mode which controls how agressive it tries to set the secondary and tertiary timing for RAM. Raja over at ASUS has admitted that sometimes the board gets it wrong. What I have been doing based on that info is to boot the machine with Rampage Tweak mode set to "1" (compatibility) mode. Save and exit and right back into BIOS to input all those timings it came up with manually. Once I've done that, I set it back to AUTO then it's good to go. This method rules out RAM timing drift. One could even go so far as to disable "MCH Recheck" on the same page once you are stable to your satisfaction.
Having said all that, everyone please ignore the following:
Have you noticed there is no 5GHz SB-E Linx/prime stable club ? Passing Linx or prime means nothing on SB-E. All it really means is that if every computer in the world blew up but yours, and we needed the next prime number to ensure man's survival, you'd be a hero. Other than that, run AIDA64 stability test, much more realistic.













