trying to get steady 4ghz

chippy08 · 25 Sep 2009 at 13:21

Hi guys been trying to a stable 4ghz but just cant do it it will go in to windows but once i try to do anything it restarts.
Im using these settings that might be wrong anyway

CPU CLOCK RATIO: x20
Advanced Cpu Features: all enabled with the exception of C3/c5/c7 state support.
QPI CLOCK RATIO: x36
UNCORE CLOCK: x16

Advanced Clock Control:

BCLK: 191mhz
PCI Express: 101mhz
CIA: DISABLED.

CPU CLOCK DRIVE: 800mV
PCI Ex CLOCK DRIVE: 900mV

Performance Enhance: OFF
XMP: OFF
System Memory Multi: x8

VOLTAGES:

VCORE: 1.287v
QPI: 1.215v
IOH: 1.1v
DRAM 1.5v - 1.66v

chippy08 · 25 Sep 2009 at 16:27

lettuce said:
trying upping the Vcore to 1.3 & QPI to 1.335, also changed the Clock skew to 100ps, and CPU clock PLL to 1.3 instead of 1.8

Ok will try that i can get in windows at 4ghz but once i try to stress it restarts

chippy08 · 25 Sep 2009 at 21:32

madindehead said:
@ chippy

I am running mine now, at 200 x 20, Vcore, 1.325V, QPI voltage 1.36V, CPU PLL voltage at 1.8V, and DRAM voltage at 1.64V.

RAM is set to 8x multi, with 8-8-8-24 timings.

And yeah, this is slightly important ^^

What other setting have you changed ?

chippy08 · 25 Sep 2009 at 21:53

madindehead said:
My Turbo Boost is disabled, my C1 and C3,5,7 are disabled. Load Line is enabled. Can't think of anything else currently.

Ok tried them setting and it blue screened on me so restarted ill go to windows but restart.

chippy08 · 25 Sep 2009 at 21:59

madindehead said:
You checking volts also?

Yes but im going to give another go just incase i missed anyhink.

chippy08 · 25 Sep 2009 at 22:18

blue screens on me What bios are you using ?

chippy08 · 25 Sep 2009 at 22:25

bobbyboy uk said:
could it be your psu???

Just changed that rob to a 650watt Be quiet

chippy08 · 25 Sep 2009 at 22:51

I got it sitting in windows now at 4ghz but as soon as i run prime95 it goes for about 20 seconds then restarts.

chippy08 · 26 Sep 2009 at 00:34

Dysfunctional said:
chippy08, please let me know if you get a stable oc of 4ghz, as i have the same bundle and can't get it to work?

Hi m8 i just put in the setting from the gigabyte tutorial just going to try stress testing but so far so good no restarting or anythink yet.

chippy08 · 26 Sep 2009 at 01:18

Dysfunctional said:
Thats awesome, let me know if the tests are ok?

3d advantage went fine just stress testing now.

chippy08 · 26 Sep 2009 at 10:49

Ok here goes

disable turbo boost
advanced cpu features all disabled except multi threading
qpi link speed x36
set bclk freq to 200mhz
memory ratio x6
uncore freq x13
cpu core 1.4000v
qpi/vti 1.515v
qpi pll to auto

once stable i think you might want to try lowering voltages and keep testing to see if stable hope this helps you. I did 27 mins prime95 stable but then went to bed so will test longer time today.

chippy08 · 26 Sep 2009 at 16:51

I will be lowering mine down later when i get time and hopefully a stable clock at the end of all the messing.

chippy08 · 26 Sep 2009 at 22:20

DavyBoy said:
1.515v Vtt and 1.4v Vcore?!?!

This is way to much mate, remember that Gigabyte 4GHz guide was written for C0 stepping i920's, you shouldn't need that kinda voltages for a D0.

Also another thing to remember when o/cing is that using to much voltage can also cause instability.

It's all about finding the right balance between each voltage for your specific chip.

For instance, I tried for ages to get my 4.2GHz o/c stable, I had Vcore at 1.35v and Vtt was at 1.415v, and it would BSOD as soon as I started Prime or LinX, so after playing around for about 4 days trying to get it stable, I finally managed to get it sorted by lowering Vtt to 1.255v and Vcore at 1.2915v.

Remember that the other voltages can help stabilize your o/c to, for my 4GHz clock, I have Vcore set to 1.275v, 1.215v Vtt, 1.140v QPI PLL, 1.140v IOH Core, 1.300v CPU PLL, and VDimm at 1.66v.

As suggested by someone else, you can try setting CPU Clock Skew to 100ps.

What kinda temps are you hitting with those voltages you are using?

I am guessing that they are pretty high, which cooler are you using also?

I was getting 77c on full load in prime95.

chippy08 · 26 Sep 2009 at 23:24

Since lowering my volts i have now got 62c on full load at 4gz.

chippy08 · 27 Sep 2009 at 00:54

madindehead said:
What voltages you using now?

When I get back to Glasgow on Tues night, I need to sit and lower my volts, as I just bumped them up to hit the overclock.

Would be interesting to see how far you were able to lower you volts by chippy.

Post them all here if you can please mate, and we can compare =)

Cpu core 1.275v
qpi/vtt 1.215v
ioh core 1.100v
dram 1.600v

chippy08 · 27 Sep 2009 at 16:35

DavyBoy said:
Same amounts of Vcore and Vtt that I use.. Although I have DRAM at 1.66v, and IOH Core at 1.140v.

62c is really low temps for 4GHz o/c I must say.. some of the lowest I have seen for people with the H50..

What are you using to monitor temps?

I havent finished playing yet as i dont have much time but i do keep checking 3d advantage to see whats the best score i can get.

chippy08 · 28 Sep 2009 at 23:08

Dysfunctional said:
Just wanna say cheers to you all for the settings you guys posted...

I just got my i7 920 to run to idle at 25c on 4ghz....

I will be posting pics of my bios for all who needs...

Its nice to know another computer is running at 4ghz.