My problem is this: I had been running 2x512Mb of OCZ PC3200 DDR rated @ Cas2 3-3-6 for the past while on my ASROCK 939Dual-Sata2, and it ran fine at any speed I threw at it.
My problem began when I aquired another 2x512Mb of the exact same OCZ RAM! My board is completely unstable with the 2Gb of RAM, even with the RAM @ 133MHz (so it runs at ~175MHz). I have to crank down the timings and crippled the RAM down to 160MHz effective to get any semblance of stability!
I have also found that when placed in auto, the mobo defaults the RAM to CAS2.5, when putting in 2x512 it defaults to the proper CAS2.
Any ideas on the problem? I have tried reducing the timings, but that does not seem to help...
Thanks!