Quote Originally Posted by sesdave View Post
Try 2.2v -These sticks should do 1000MHz plus no problem with about 2.3v-2.4v Check this review out - http://www.xbitlabs.com/articles/mem...dr2-800_2.html
What BIOS are you running and whats the rest of your BIOS settings and system setup.
Check the forum for previous threads on 2:3 and 4:5 on the P5W. This one was an Analysis of P5W DH memory 4:5 and 2:3 dividers with an earlier BIOS version by eva2000
http://www.xtremesystems.org/forums/...php?p=1683353l.

Another thought - have you removed NB/SB heatsinks and replaced paste with AS5. It all helps the overclock stability and keeps board cool. Your problem may not be the memory but the overall setting/volts you are using in the BIOS - please post them.
Quote Originally Posted by nickfd View Post
If I'm not mistaken, 2:3 is very problematic on this board when you start getting up in fsb speeds. I know you shouldn't have any issues doing 4:5 though (I've personally done it up to ~950ish fsb stable with my corsair pc2-8500s).

2.1v *should* be enough, however you may want to try 2.2 or even 2.3, however I'd highly recommend running a fan nearby to displace some of the heat that it will cause.

There was a great article I read the other day on cas latencies vs higher fsb with c2d cpus (but focusing on nforce680 chipset since you could asynchronously split cpu ram fsbs). One of the sidenotes was operating temperatures of ram and voltages required to hit the higher fsbs. I think at 2.2-2.4v, some of the sticks got up to the 50s or even 60s C!
Thanks sesdave and nickfd

I'm using the 2004 bios. I have removed the NB/SB and replaced paste with AS5, however I'm going to redo this and probably replace with Thermalright HR05 on the SB and Thermalright HR05 SLI on the NB. I need to check if the HR05 SLI will fit, as I have a Ultra 120. I will do some more tests (hopefully if I get time this week) and post the BIOS voltage settings.