Just thought I'd share my experiences the past few days since there may be other people considering getting this board still. I've had 3x P35-T2R's now. Curse Asus for getting me in the RMA mindset (p5k premium madness) instead of the true troubleshooting mindset. I just had the same issue occur with (3rd) P35-T2R that caused me to send back the second P35-T2R.

P35-T2R #1 issue: Electrical noise.

P35-T2R #2 issue: C1 Error, would not post with any of the ram sticks I had. CMOS flush had no effect. Tried single Mushkin XP2 8500's in every slot and tried some OCZ platinum Rev.2's i had sitting around. The problem was both had EPP's and still wouldn't let it boot into BIOS. So, unknowingly I RMA'd the board (curse asus again). Board also had same quiet electrical noise.

P35-T2R #3: C1 error, worked around by picking up a cheapie 512mb stick of crucial rendition 667mhz with no EPP. Stick allowed me to get into the BIOS up DIMM voltages to 2.3v and boot in with my Mushkin sticks again. This board also has the same quiet noise.

Also, I've been reading up on first generation digital PWM and it seems one side effect is a slight (but normal) very quiet electrical noise. It isn't in a frequency that most people are able to hear and is not loud enough to hear through my Sennheiser HD555's so its not that big of a deal (tested people in my household as to who could hear the noise and only 3 of 5 could hear it standing at 4ft). All 3 of the boards had this slight noise - more so when the voltages are upped for overclocking.

So it turns out that all 3 P35-T2r's I've had have not actually needed to be RMA'd. The pickyness with some ram seems to be an issue, but if you follow recommendations of the thread and go for successful sticks like OCZ flex 9200 you will likely be fine.