E6420, can't get stable past 350 FSB. Help?

sremick

Junior Member
Mar 31, 2000
8
0
61
Ahh, first post. Be gentle.

You might as well consider me technologically-adept but new to modern OCing. I understand what's going on but I'm having trouble getting the right details to make things work well here. I just built a new PC and tried to do everything right (see my signature for the hardware list). My goal was to get at least 3.2GHz, most-likely 3.4GHz, and maybe a tad more if I was lucky. You can imagine my frustration where anything past 2.8GHz (350 FSB) is unstable.

I've been reading. A lot. I've tried more combinations of settings than I could possibly list up-front (we won't talk about how late I was up last night). I'm aware of the issues 360-400 FSB. But geesh... seems 95% of people with the E6420 and a decent MB can pass 3.2GHz as easily as passing a turtle in your sportscar... what's my problem??? I must be missing something stupid.

I know my memory timings are tight, but I'm not trying to OC this RAM... this is what it's rated for. I chose it specifically so that I could go to 450 FSB and still be operating in the memory's specifications.

So anyhow... looking for a forum of intelligent and helpful people who would be willing to take on a challenge and help this newbie cut his teeth on modern overclocking and turn this system into a decent performer.

Like I said... on 350FSB, Orthos can run all night. But on my current settings, it dies in a matter of seconds (at least it boots). Here's what I'm on right now:

FSB: 401
DRAM: 802MHz (1:1)
PCI-E: 110MHz
PCI clock sync: 33.33MHz
Spread Spectrum: disabled
Memory: 2.25V
CPU Vcore: 1.50V
FSB Term: 1.40V
NB Vcore: 1.55V
SB Vcore: 1.60V
ICH Chipset: 1.215V

C1E: Disabled
Vanderpool: disabled
PECI: disabled
Speedstep: disabled

Memory timings: 4-4-4-5-6-42-10-10-10-10
Static Read Control: disabled
PEG Force X1: disabled
PEG Link Mode: Auto
ASUS CGI: disabled

Hardware list:
CPU: Intel Core 2 Duo E6420 FPO/Batch: L644G451
CPU Heatsink: Zalman 9700LED
MB: Asus P5B Deluxe Rev 1.10G BIOS: 1101
RAM 2x 1GB G.Skill DDR2-1000 (PC8000) F2-8000PHU2-2GBHZ 4-4-4-5
PSU: SeaSonic S12+ SS-550HT 550W
Noctua NC-U6 on NB, Zalman ZM-NBF47 on SB
Shin-Etsu X23 on CPU, NB & SB heatsinks