2 weeks ago I only had the 1gig of RAM and I didnt have the firewire card. I got the system up to 2.7Ghz using the following setup:
Vcore 1.35V (+0.025V)
Memory set to 1:1
9*300Mhz = 2.7Ghz
EVERYTHING ELSE AUTO (and all things that need to be disabled are off)
Temperatures were fine, <50c full load with TAT.
Then I added the Firewire card and it booted fine. Stable for the following week or two
Yesterday I added another gig of RAM (to bring me to 2gig) and stupidly I didnt revert to stock settings before installing it. I booted, and the motherboard did its usual trick of reducing back down to 200Mhz*9. It wouldnt then boot above about 9*240.
I upped the VDRAM to +0.2V and manually set the timigs to 4-4-4-12. That got me to 270*9. However when I tried to go further I got the bleeps and had to clear the CMOS.
Next I tried following the guide, set the timigs to 4-4-4-12, the FSB to +0.1v and the MCH to +0.1v and the VDRAM to +0.3v (2.1v). I tried to boot at 9*270 but it refused and went back to stock.
Yes, I would suggest loosening your timings a little to see if that will get the system stable.
Another thought I had is maybe the RAM isn't matched close enough to work together. If they didn't come in a kit, even RAM of the same model number might have different type chips that make up the module. Difference subtle enough that could cause these problems maybe.
EDIT: Try this first. One other suggestion. Try removing the firewire card. Crazy I know, but it COULD be the culprit. Maybe the PCI frequency isn't locking like it's supposed to. I've experienced that on several motherboards.
Still no luck. I put the RAM setting back to AUTO (SPD was setting it to 5-5-5-18 which seems OK?)
I removed both PCI cards, still wont boot above 9*270mhz
I increased Vcore to 1.375, no difference
I increased Vcore to 1.4, no differemce
I tried setting the PCI-E freq to 100, no differemce (bleeps)
I tried upping the PCI-E by +0.1V, no difference
I didnt try each RAM pair separately, as ultimately I need to use them together and I'm not buying new stuff,
One thing I have noticed is that sometimes (e.g. when I put Vcore to 1.4, it turns on, and seems like it loads windows (hdd lights, etc) but nothing comes on the screen at all - not even the GFX bios stuff... weird... Hard reset results in the same thing, OFF then ON brings the screen up again but settings go back to 9*200Mhz
I dont know what else to try now. Perhaps my RAM is not very well matched and 2.430Ghz is a good as I'm going to get?!? Booo!!
OK highest stable setting like this is 9*350=3.150Ghz with STOCK settings aside from
PCI-E freq = 105
When I go to 360 I get errors with TAT. What should I raise next to keep going? Also should I try reducing vdram and vcore first as I dont actually know whether I need them to be raised - perhaps my problem was the PCI exp freq all along.