kucingfight: Is there a reason you told barclaycard to bump vdimm to 2.75 instead of 2.85?

My own experience with my 2.4C hasn't been good, tried vagp up to 1.8 as well as increasing vcore up to 1.6, but it just won't be prime stable above 255MHz. I've already elimated the RAM by making it run at a lowly 200-220MHz and I know the RAM is prime stable up to above 255Mhz.

Well my usual settings if I'm OC-ing are to set to 255MHz FSB, default vcore, MAM on, PAM standard, 1:1, 2.5-3-4-6, default vagp, vdimm 2.85v.
That setup is prime/3dmark/memtest stable. But the moment I take a step higher in FSB, prime goes to hell after less than a minute. Increasing vagp and vcore doesn't help, bumping RAM speeds down doesn't either. And yeah, the AGP/PCI is set to 66/33.

zt_lee: What are the other settings for in that little tweak utility you posted? And do changes take effect immediately? I never knew you could change timings from Windows.

This post has been edited by evilnickwong: Sep 29 2005, 01:07 AM

Don't know about other manufacturers, but I know that for a P4P800, PAT is always enabled if you're running at 200MHz FSB (i.e. not OC-ed). The moment you bump it up to even 201, PAT gets disabled. As far as I've read, the Performance Acceleration Mode only attempts to tighten RAM timings which means it's only useful with TCCD or BH-5. I know this for a fact because if I leave RAM timings to SPD, but set PAM to Turbo, my old BH-5 RAMs would default to 2-2-2-5.

The only way I've seen for getting PAT above 200MHz FSB is with bigtoe's BIOS mod. More details at the ABXZone forums.

I just noticed today that with current new BIOS, the P4P800-E Dlx has PAT enabled even if you've OC-ed to 260MHz FSB. Previously, PAT would only be enabled on this board at stock 200MHz.