P5B-Deluxe and Ballistix PC2-8500 problem

[graysky]

I just bought a pair of and they will work in any mode except the fastest two. These work fine: 1:1 (533 MHz), 4:5 (667 MHz), and 2:3 (800 MHz). If I boot them in in 3:5 (889 MHz) or 1:2 (1,066 MHz) windows will not start.

If I boot into Memtest86+ V1.70, they give TONS of errors in the faster two modes, but are just fine in the lower 3 modes... I've tried manually setting the timings/voltage and also letting the board do it with no luck either case. I'm using 5-5-5-15-4-30-10-10-10-11 @ 2.25 v initially.

I have a P5B-Deluxe running BIOS 1215. Anyone else out there have this board with these sticks? I'm thinking since I get errors at the higher modes, it's my board, not the memory.

Opinions are welcome.

Thanks!
Additional info: q6600, x1950 pro 512 meg. I normally run the system @ 9x333 @ 1.2625vcore with my old memory (DDR2-800 ballistix @ 1:1 with these timings: 4-4-4-12-4-20-10-10-10-11)

[GSte]

Hi, I have this board and RAM, using the 1216 BIOS and all is fine. Runs at 430MHz cas3, 600+MHz cas 5, 530+MHz cas4 using all manner of dividers. I seem to recall that 1215 fixed a memory issue so don't think updating to 1216 will help. Got 2 kits of that RAM and both work okay, so I reckon its probably that particular kit you've got..... if it's defective then running at higher frequencies will show its weaknesses. The 1:2 divider is rock solid on my board, I am 100% sure of that because its the one I use most. I assume you've bumped up the northbridge voltage?



[good work on the C2D OCing guide by the way, I though it was great, is it a sticky on any other forum? Sure I've seen it somewhere.....]

[graysky]

Thanks for the info. Turns out I had to jack the NBVcore up 2 notches and the ICH up to it's highest setting to run error-free @ PC7100 (1,111 MHz). Not worth it to me when I can run my older Ballistix (DDR2-800) @ PC4300 (667 MHz) @ 3-3-3-6

Also, thanks for the kind words