Originally posted by: BlackPear1
By the way, is your "14 min. mark" at the dreaded test #8? That's where mine dies at 1T.
Yep, the dreaded test #8 it is. Damn you, Modulo 20 Ones & Zeroes!!!
I tried running Memtest86 in some different RAM configurations and found that either DIMM, by itself, passes all tests at 1T with flying colors. So it would seem to be an issue with 1T + Dual Channel mode. I tried proving this once and for all by using DIMM1 and DIMM3, running both sticks in Single Channel, but for some reason the board won't POST in this configuration (although it should work according to the ASRock manual).
Of course at that point I had to wonder: If I could get it to POST in Single Channel 1T and it was stable, would it be worth it? After running some tests, at least from a pure memory bandwidth perspective, the answer would appear to be NO:
200MHz Single Channel, 1T: 3031MB/s
200MHz Single Channel, 2T: 2716MB/s
200MHz Dual Channel, 1T: 5776MB/s
200MHz Dual Channel, 2T: 4710MB/s
Dual Channel 2T is actually
55% faster (!) than Single Channel 1T, in terms of pure memory bandwidth. (Measured with Sandra -- apologies to the anti-synthetic benchmark crowd.) I'm sure that will come as no surprise to most, but to an AMD/dual channel newb like myself it was pretty interesting to see the difference.
I also tried different Dual Channel + 1T configurations -- swapping DIMM1 and DIMM2, or using DIMM3 and DIMM4 instead -- but test #8 got me every time.
So I was completely convinced that it's an issue with Dual Channel + 1T on this board, until I read Lord Banshee's post. Now I'm wondering about memory dividers. Maybe it's time for more testing....