Overclocking i920...

JLyte · 13 Jan 2012 at 16:57

Hey people, I'm totally new to overclocking, having my first crack at it today. So far i've managed to push up the BClck to 183x20 (3.66Ghz) without altering any of the voltages, because to be honest I have no idea what they do, or how to change them. Disabled SS and Turbo.
Prime 95 stress tests are stable no problems encountered.

Any tips for getting to 3.8Ghz? Atm my Core Voltage under load is 1.176 according to CPU-Z
Temps are averaging idle ~45C and under load ~70C

I could push the BClck up more but im worried about voltages + memory speeds/voltages, because I really dont have a clue what i'm doing there, or how to go about finding the right values.

All advise welcome!!

Btw it's a D0 revision

wazza300 · 13 Jan 2012 at 17:19

what cooler are you using,and what motherboard?

JLyte · 13 Jan 2012 at 17:32

Motherboard is an Alienware one 133mhz bus. Don't know the model

Stock cooler as well.

Edit: Btw i've noticed my Dram freq speed is up to about 730Mhz from 668Mhz, I take it this is the Memory speeding up, is there a risk of killing my memory with higher freqs?

setter · 13 Jan 2012 at 17:34

Whoah, dont go oc'ing on the stock cooler. Theese are very hot running chips when oc'd, your gonna need something a bit more substantial for cooling.

JLyte · 13 Jan 2012 at 17:37

setter said:
Whoah, dont go oc'ing on the stock cooler. Theese are very hot running chips when oc'd, your gonna need something a bit more substantial for cooling.

I've stress tested it running @ 3.66 and i've not come close to dangerous temps, I reckon getting to 3.8 wouldn't push it up over 74C?

wazza300 · 13 Jan 2012 at 17:56

i wouldnt know what to adjust on that mb,highest i would go with stock cooler is 3.2ghz,you tested it fully 100% stress test with intel burn test max 10 runs on high,core temps no higher than 80c

for 3.8ghz it would be 180x21 bclk, cpu voltage around 1.225v and qpi/vtt or integrated memory controller voltage around 1.32v,dram voltage 1.5v or 1.65v

memory speed or multiplier would be 8x giving you 1440mhz ram speed due to 180 bclk

only adjust these settings if your cpu stays under 80c if not lower the oc or keep at stock untill you buy a good quality aftermarket cooler

setter · 13 Jan 2012 at 17:59

The voltage jumps required can be pretty steep, for instance. I can run all the way to 3.6ghz on 1.18vcore, at 3.8 and above its over 1.27 vcore, therefore with the higher voltage the temps increase a lot more. At that voltage and clockspeed of 4.0ghz, im hitting the mid 70's with a pretty high end aftermarket cpu cooler with dual high cfm fans.

JLyte · 13 Jan 2012 at 19:00

Okay so I took the leap, pushed the BClck to 180 and turned on turbo to get the x21 multiplier, set the voltages and x8 on the DRAM.

Running the stress tests now, but things are looking good. After an hour my peak core temp is 74C, the others are averaging 70C. Core Voltage according to CPU-Z is 1.232.

Thanks a lot for the help, these results are encouraging so far, im tempted to try for 3.9Ghz... but maybe i'll stop here whilst im ahead

wazza300 · 13 Jan 2012 at 20:53

If you did want to push for 4ghz you would need around 1.25-1.3v CPU voltage imo but keep temps below 80c