Overclocking Odd Memory Overclocking Behavior

Hello everyone, I've been trolling the forums for a few years and posting in the new bits for a while now, but I've run into a bit of a snag while overlocking my system and thought someone might be able to help me.

I'm running an Athlon64 X2 5000+ Black Edition on an MSI K9A2 Platinum with 4GB of OCZ Reaper HPC DDR2-800 (4-4-4-15). Here's my deal; I'm sitting at a FSB of 215 MHz right now and I'm starting to run into errors in Prime95 while running the blended torture test, which is odd for a number of reasons. First of all, the memory is reported as running at 400 MHz still by CPU-Z, AMD's AOD utility, and Everest, and this is only a very slight overclock on the memory. I came to the conclusion that it's the memory causing the problem and not the CPU because I can run Small FFT's all day long with no issues; It's only the blend test that starts to show errors.

Lowering the timings to 5-5-5-15 doesn't fix this issue and neither does upping the voltage to the memory (up to 2.2V does nothing to improve stability).

I'm assuming that the memory could be reported as running at 400 MHz because I simply haven't hit another usable memory strap yet, but then why would I be running into errors? I'm going to run memtest overnight to see if that reports any errors, but in the meantime, does anyone have any suggestions for me?

 

Have you set the voltage on the Reaper to the 2.1v OCZ specifies? I had issues with my Ballistix stability at less then the voltage specified by Crucial.

 

Yep, up to 2.2V.

 

Make sure you're running the latest BIOS for your mobo, I've not had a play on the K9A but on the gigabyte AM2 board in my sig updating the BIOS made a massive difference to memory stability, it also solved a similar problem where whatever I set the latencies to in the BIOS failed to register in Everest.

Are you running 2x2gb or 4x1gb dimms and which slots are they in? Any particular reason you're upping the fsb when you have an unlocked multiplier on the BE, just raising the multiplier you don't have to worry about the ram or HTT link frequencies.