I admit I never really had a head for overclocking, but I've always been able to get an increase I was happy with. I've had my i7 920 for a while now and just accepted that I can't overclock it, but it has started to bug me lately for whatever reason. I'm constantly reading all these threads saying an overclock to 3.6GHz should be easy on this cpu adjusting nothing more than the BCLK and maybe a slight bump to the vcore, but I swear I can't even get this thing stable at 2.9GHz. I even tried using the Dummy OC feature and it won't even boot. Is there a bad component here or am I really that incompetent?
make sure your memory has been set correctly in the bios--if i dont set mine manually or use xmp profile the bios sets it to 1066mhz and 1.5v instead of 1600mhz and 1.65v so when i start to overclock the low voltage causes instability
also remember raising the bclk also overclocks the memory speed so you may need to drop the memory multiplier to 10 or 8 depending how high you overclock--ie 160bclk x 10 memory multiplier or 200bclk x 8 memory multiplier keeps your ram at 1600mhz
Well I set the bclk to 160, memory frequency to 10x, cpu uncore to 21x, CPU and Memory voltages to 1.35v and 1.65v respectively. Rebooted and now it will not post. CMOS reset time, any ideas what went wrong?
Well as it turns out the memory is what was causing the instability. It's rated at 1600 but I found that as long as I keep it under 1066, everything runs fine. Ran prime95 for 4 hours at 3.7GHz without a hitch last night.
Disturbing about the memory though. I'm not certain if it needs to be replaced or if I just don't have it configured properly.
heres the bios settings i am using--your motherboard isnt the same but it should give you something to try--just dont go straight for the 200bclck start about 170 with the other settings i have then you can up the bclk
check your memory timings 8-8-8 or 9-9-9 depending on your ram
memory multiplier x8
ram voltage 1.65v
cpu clock ratio 20x
cpu cores all enabled
hyper threading enabled--8 cores
cpu enhanced halt (c1e) enabled
cpu thermal monitor enabled
cpu eist enabled
bi-directional prochot enabled
qpi link speed 36
uncore frequency 17
bclk control enabled
cia2--disabled --you wont have that as its gigabyte auto overclock but you probably have something similar
cpu clock drive 800mv
pci-e clock drive 900mv
cpu clock skew 0ps
ioh clock skew 0ps
cpu load line calibration (vdroop) enabled
cpu vcore 1.3v --shows 1.28v in cpuz
qpi/vtt voltage 1.4v --as far as i remember this must be within 0.5v of ram voltage
this gives me 4.0ghz and 4.2ghz when turbo kicks in and 1600mhz on the ram