RMA process with ASUS was awesome. I should have my new p8p67 today. I plan to hold on to it until the new boards come out in a few more months and then I will exchange it according to whatever the plans are on the recall.
I am having the same problem with my P8P67 Pro board. Worst problem is I cant seem to RMA the dang thing or get any help from the retailer right now. Everyone is so slammed with calls about the SATA port recall those of us with real problems are sitting in the dark with no working machine.
If you have a friend or someone with the same CPU I would try a swap really quick and rule that out. It may just be that your CPU is happy in DOS tests but hates running specific commands in the windows environment.
Always do a fresh install. Its a good excuse to get rid of all the crap and guarantees you will have a machine that runs well with the new hardware (that is assuming the hardware is good).
Mine was holding up great until the 1204 bios update killed it. Kinda wish I had just been happy with a running machine as returning it or RMA's seem to be a nightmare now with the recall.
I went with the 100x50 overclock on my 2500k and it is very stable even when running prime95 etc. My temp is usually about 32-25c when surfing or idling and about 43-48 when gaming.
I suggest you wait a week or so after a new update to make sure no new bugs crop up. If your system is stable and not having any issues, no bios update is really needed unless you want the latest updates. Not all bios updates address major issues and are very specific to a need on the board.
I have never had a computer that I have resold. I keep em till they are done or give them away to friends and family. If your computer is working fine you may as well not be in a hurry to be without a motherboard. Just wait until the new boards are out, read some reviews on them see if they...
The hard part with retailers is that most of them have pulled the remaining stock and sent it back to the distributors. I have a dead board with a bad bios on it and cant send it back to the retailer or they will just hold on to it until the new boards are released in a month. Kinda frustrating.