DDR2 8GB Stability Issues

[n30_mkii]

Hi all, ive been running my OCZ reapers (2x2Gb) fine at 1080mhz, I have just added anoth 2x2gb of Crucial dominators, which again will run fine at that speed on there own.

The problem is as soon as I boot with all 8gb I get a BSOD. I have upped the NB voltage and the Ram voltage which is now allowing me to at least boot into windows but even then I don't seem to be 100% stable. What else can I do? I'm currently running them at 5-5-5-18 and have just loosened to 5-6-6-20 but i'm still not 100%

The board is the Asus P5Q and a Q6600 @ 3.6

What settings should I be using? I don't mind running at 800mhz if it's 100% stable

Thanks

 

[n30_mkii]

Any other tips for getting them stable

I have them at 5-7-7-22 and have been running prime for the last 45mins ok.

tbh i'm a little gutted they wont run any better but as long as they are stable I'm happy

 

[n30_mkii]

Thanks for that it's good to know someone has this working ok.

My only though is that it's because I'm mixing modules or I have a board with a Northbridge which won't cope. I had a 2 1/2 hour prime, next time I booted the machine I got a 0x00000007E error, it's very hit and miss, even if I loosen the timings lots and up the NB it still won't always boot!

I think I will either have to look for a different board or a full set of identical memory.

 

[n30_mkii]

I'm not 100% sure which the memory controller is in the BIOS? Do you happen to know on the Asus boards? I thought it was under the NB but perhaps not