You didn't read my statements very carefully. I did not say the PCB plays no role. I said it is minimal compared to the chips they carry, and that it isn't that hard to make a competent PCB for this application.
If your concern is voltage, many, many people are running 3.1V though the Buffalo. If it plays out as you say that would indicate there is nothing wrong with the Buffalo PCB. I run 2.97V full time though my 3700s, and the 3200s took it just as easily. Not even warm, memtest clean.
And like I said on the Asus, 450MHz with the tightest timings dual channel PAT enabled on 2.85V. It is good ram, and better than anything else $99 will buy you. And better than any CH5 module regardless of price.
And believe it or not, I am well aware that a lot of factors play a role in the OC. Explain that to the people that claim Buffalos can't produce good results, because their problem isn't the ram.