Need help overclocking i7 940

[NickN]

Is this the memory in use?

OCZ3G1600LV6GK

http://www.newegg.com/Product/Product.a ... 6820227365


If so your timing is too high which means the memory is running too slow

8-8-8-24

[fvjuke]

ok thanks Nick.

[NickN]

I am saying those are the correct timings and voltages if you are using the memory I posted.. yes

and if 1.66v DRAM voltage is stable over 1.65.. thats OK just no higher

[nomadpro]

I just wanted to give you some info I got my 940 running at 4ghz and realtemp is 52 celcius without touching the voltages at all  4ghz should be no problem and you wont even have to mess with the voltages..

[NickN]

[quote]ok thanks Nick.

[NickN]

[quote]I just wanted to give you some info I got my 940 running at 4ghz and realtemp is 52 celcius without touching the voltages at all but unlike you I have some really good air cooling thermal 120 ultra so if you get some decent cooling 4ghz should be no problem and you wont even have to mess with the voltages..

[Ulf B]

[quote]ok thanks Nick.

[raptorx]

[quote][quote]ok thanks Nick.

[dvpro]

Any updates on the latest version of the bios?

I am having all sorts of issues with just anout the same gear......
my stuff idles 48c and I am blowing 80c under the latest OCCT within a few minutes. And can someone tell me where in the bios is "turbo"? I have been searching for it to disable..but no joy.
thx

[Ulf B]

Any updates on the latest version of the bios?

I am having all sorts of issues with just anout the same gear......
my stuff idles 48c and I am blowing 80c under the latest OCCT within a few minutes. And can someone tell me where in the bios is "turbo"? I have been searching for it to disable..but no joy.
thx

Latest BIOS version is 1102 and I flashed it on the first boot, prior to installing Vista and installing the latest chipset drivers.

Here is an article on overklocking the i7 920, which might be helpful.
http://www.bit-tech.net/hardware/cpus/2 ... e-i7-920/1

You may set the CPU ratio to 22 in BIOS for the 940.
I'm still using the stock cooler, but during the weekend I'll install a Zalman CNPS9500 AT cpu fan and hopefully I'll be able to reach 4GHz.

At what CPU speed do you reach those temps? Disable hyperthreading in BIOS, if you don't use programs that use it (FSX doesn't) - it will lower the temps a bit.

[dvpro]

Can you please look over where I'm at with this?

I have all the bios settings written down:

Under Manual in AI Tweaker:
CPU Ratio:22
BCLK:180
PCIE:100
DRAM:1443
UCLK:Auto
QPI Link Data Rate: AUTO

All Auto down to DRAM BUSS VOLTAGE: 1.66
The rest Auto.

Dram 1st 4:
8
8
8
24

This was the same as before but now it reads 1T versus 2t in my other post.

Under Advanced:
Freq: 3.98
Bclk: 181 Mhz

Cache L1: 128 kb
Cache L2: 1024 kb
Cache L3 8192 kb

Ratio Actual value: 22
CPUID: 106A4

CPU Ratio Setting: 22
C1E: Disabled
Hardware Prefetcher: Enabled
Adjacent cache line prefetcher: Enabled
Intel  Virt Tech:Disabled
CPU TM Function: Disabled
Execute Disable Bit: Enabled
HT: Disabled
Active Processors: Enabled
A20m: Disabled
C State: Disabled

That's all the bios settings in mine. I have seen other items from other posts but not on my mobo...maybe a different flash or the Palm version? I dunno.

This setup is just under 4 gigs, and can't pass more than a few minutes of OCCT load test.

Turbo V has now been disables from the startup. I was under the assumpion that was in the bios...hence my other post....learning as I go, but it is finally starting to make sense.

Note: At out of the box speeds I was idling at = +50c

I pulled the 120 Thermalrite and followed your description on the thin coat of thermal paste (artic freeze) I didn't have the balls to shand down the processor lid....thought about it...too small.

After resetting the heat sink...temp at idle dropped to 40c. Clocked up to 3.96 I sit around 50c but not able to get past the load test. Sink is seated nice and tight....fan spins the right direction!! With the numbers I posted is this a thermal issue? This case is a mini climate center.
Thx

Your guidence on a stable 4 gigs is appreciated

[NickN]

QPI/DRAM VOLTAGE 1.35v

DRAM VOLTAGE: 1.65 or 1.66v

you have temp problem.. LOAD LINE CALIBRATION: ENABLED and work Vcore to the lowest point where it is stable with the QPI/DRAM voltage I listed above

Somewhere between 1.34 and 1.40v

If you can not get it to run stable at 80c or less your cooling solution is not doing the job.. either alignment or not flat


Also, ambient temp where you are will effect the high end.. if its warm it will be harder to keep it 80c and under

[dvpro]

[quote]QPI/DRAM VOLTAGE 1.35v done

DRAM VOLTAGE: 1.65 or 1.66v Would keep putting it back to 1.66 when I attempted to change to 1.65

you have temp problem.. LOAD LINE CALIBRATION: ENABLED Done
and work Vcore to the lowest point where it is stable with the QPI/DRAM voltage I listed above

Somewhere between 1.34 and 1.40v I set it to 1.3812...but I guess I don't know what stable means. Should I raise it...than load test, or lower it than test?

If you can not get it to run stable at 80c or less your cooling solution is not doing the job.. either alignment or not flat

[Slotback]

You're running at 1T, not 2T. The CPU-Z 'timing table' is something else.

REAL TEMP has the correct temperature, OCCT is reporting 5 degrees cooler, as it assumes the maximum temperature is 95 degrees, not 100 degrees, as Nick stated in another thread.  ;)

[Ulf B]

Hi,

Intresting article from AnandTech about the difference between different batches of Core i7 920 processors regarding overclocking potential: http://www.anandtech.com/cpuchipsets/in ... spx?i=3502

My own newbie experience with overclocking 940 on a P6T Deluxe board is that it was very easy getting the cpu up to 3.8 GHz with a VCore voltage at 1.27. My cooler is small and not that efficient (Zalman CNPS9500 AT) but the temps stay under 82C running OCCT v2.0.1. The temp readings match Real Temp 2.90 with TjMax set to 100). To be able to reach 3.9 GHz I had to raise the VCore voltage pretty much (don't remember the exact figures but it was close to 1.35V) to get it stable, but the temp increased too much.

At the 3.8 OC I run my OCZ 1600 3x2GB sticks at