Core i7/X58 Overclocking Thread

[Hornet331]

Thanks,

Well to tell you the truth. I found out if you feed it with 13 to 16x then my system will boot with low voltage and it is more stable. I know it is strange. The memory has to be 6x and Uncore 13 to 16x. If the memory is x8 then the Uncore should be 17 to 20x.

I hope this info will help you guys out on the quest of getting a very good lower voltage with higher clocks.

Interesting info thx.

Seems the part that gets unstable very fast is the uncore part. I think the large and "slow" 3rd level cache has its price.

To bad you need a high clocked L3 cache to rock SPI.

[Metroid]

You were right, WCG is not like prime 95 100% all the time

So 4.0Ghz is good enough to stay, temps are good.

I have changed some settings to work only up to 70% of the processor force, each processor will run at 70% = 8 = 5 and half processors

[bmilos]

Any new OC news Sonofander?

Thanks for opening my eyes to the QPI voltage... I was having a brutal time getting P95 to run > 1m until I pumped that up a bit.

Also, since turning off Loadline and HT, CPUZ only showing 4 threads.... Normal?

[SAE]

HT on = 8 threads
HT off = 4 threads

That's it.

[bmilos]

thought so, but, ya know... Never a bad thing to say I don't know. It's when you assume you are right and really aren't that you start getting into trouble...

[dj883u2]

New Test!

Configuration:

Processor: Intel Core i7 920 (Nehalem);
Motherboard: Gigabyte GA-EX58-UD5 - Bios F4K;
Ram: Corsair 6GB DDR3 1600 cas 8-8-8-24 - 1.65v "TR3X6G1600C8D";
Cooling: Air - Asus Triton 81;
Sistem: Windows Vista 64 bit.

Frequency Cpu: 4515Mhz "215x21" - Voltage: 1.37v.

Super PI 1M:



Super PI 2M:



Super PI 4M:



Super PI 8M:



Super PI 16M:



Super PI 32M:



Validazione:

CPU-Z Validator 3.0

Very Good Cpu!

[gallag]

New Test!



Very Good Cpu!

Very Nice

[Lukee]

New Test!

Configuration:

Processor: Intel Core i7 920 (Nehalem);
Motherboard: Gigabyte GA-EX58-UD5 - Bios F4K;
Ram: Corsair 6GB DDR3 1600 cas 8-8-8-24 - 1.65v "TR3X6G1600C8D";
Cooling: Air - Asus Triton 81;
Sistem: Windows Vista 64 bit.

Frequency Cpu: 4515Mhz "215x21" - Voltage: 1.37v.
Very Good Cpu!

How much do you want for it?

[Splave]

How does this look? Bolted down v2

[dj883u2]

How much do you want for it?

Is priceless.

[Aberration]

Wow. Very nice CPU. Care to share your BIOS settings?

[Splave]

I'll take some pics and post later

[dejanh]

Lol, that's not even a gold cpu, that's a platinum cpu! BIOS settings do not matter. He's probably one of the two people that will ever get these cpus. Insane clocks on air.

[mascaras]

Hi again

max i tested (not prime)

Core i7 920 @ 4400Mhz
Gigabyte UD5 (f4K)
3GB Corsair 1600Mhz

[Lukee]

Is priceless.

Yes, it is.

[003]

New Test!

Configuration:

Processor: Intel Core i7 920 (Nehalem);
Motherboard: Gigabyte GA-EX58-UD5 - Bios F4K;
Ram: Corsair 6GB DDR3 1600 cas 8-8-8-24 - 1.65v "TR3X6G1600C8D";
Cooling: Air - Asus Triton 81;
Sistem: Windows Vista 64 bit.

Frequency Cpu: 4515Mhz "215x21" - Voltage: 1.37v.

Very Good Cpu!

What the freaking hell?! 4.5GHz stable on god damn air?!! Can't say I'm not extremely jealous, sorry.

[dejanh]

What the freaking hell?! 4.5GHz stable on god damn air?!! Can't say I'm not extremely jealous, sorry.

Indeed...that is one sick OC. I managed to find a setting I am happy with for my Core i7 940 on air. 3.95GHz (19x208MHz) 4-core 8-thread 64-bit Prime95 stable, memory at 1667MHz 7-8-7-22 timings, with 1.336V.

Not bad I guess, but not even close to the dude couple of posts above. 4.5GHz on air! WTF! Jealous.

Edit: After reviewing his screenshots again...I am suspicious that this is all legitimate on air. Look at his temps and his voltage. I find this quite irregular. Maybe it is true, but I'm skeptic that it is on air. I'd say very good water or SS. On air I was able to SuperPI at 4.2-4.3GHz with about 1.4V at best and temps get up there for sure, especially with longer runs of SuperPI.

[fornowagain]

Maybe its just cold there?

[003]

Edit: After reviewing his screenshots again...I am suspicious that this is all legitimate on air.

I think you're right. Those temps are BS. At 1.3v on stock cooling and 3.8GHz, I hit load temps of 100C, and idle at 55C. Absolutely no way those temps are real.

He must be on chilled water or really good normal water. I'm just not buying that he is on air. Unless he took the PC outside in -15C weather or something like that, which HAS been done before. But that would seem to be a rather significant detail to omit.

[Thasp]

Indeed...that is one sick OC. I managed to find a setting I am happy with for my Core i7 940 on air. 3.95GHz (19x208MHz) 4-core 8-thread 64-bit Prime95 stable, memory at 1667MHz 7-8-7-22 timings, with 1.336V.

Not bad I guess, but not even close to the dude couple of posts above. 4.5GHz on air! WTF! Jealous.

Edit: After reviewing his screenshots again...I am suspicious that this is all legitimate on air. Look at his temps and his voltage. I find this quite irregular. Maybe it is true, but I'm skeptic that it is on air. I'd say very good water or SS. On air I was able to SuperPI at 4.2-4.3GHz with about 1.4V at best and temps get up there for sure, especially with longer runs of SuperPI.

superpi stable and real stable are two separate things

what does it do on quad prime?

This is very interesting to me. Back in965 days, i remember the asus p5b beating the out of my gigabyte ds3, with numerous different revs.

In this thread, every brand of mobo seems to give the same general results. I'm going to be running chilled water w/ fans on the board, with stuff that'll require the 8 hr prime stability. I do it right now with a 3.92 GHz q6600 g0 an p5k deluxe.

[Guacamole]

Here are my 24/7 settings so far but I just can't prime more than 3 hours with one more tick on the Bclk CAN'T DO IT! So I am running 210X19 at like 3.985Ghz (gay).. I mean man I just don't get it, doesn't matter how much voltage or what I change I can't do 4.0Ghz stable... Anyway I am really happy with the performance of this machine it is awesome! Fastest computer ever that's all there is to it.... My read, write and copy are incredible so I'm cool with it....

[Hornet331]

You were right, WCG is not like prime 95 100% all the time

So 4.0Ghz is good enough to stay, temps are good.

I have changed some settings to work only up to 70% of the processor force, each processor will run at 70% = 8 = 5 and half processors

And WCG stresses the CPU more then most games.

So expect even lower temps when playing games (but maybe that will change when game get multithreaded, but till then we already have westmere )

[FuriousSalesman]

Does anyone know if there is an issue running a 30 multiplier on 133bcl @1.35V with a 965?

[dejanh]

Here are my 24/7 settings so far but I just can't prime more than 3 hours with one more tick on the Bclk CAN'T DO IT! So I am running 210X19 at like 3.985Ghz (gay).. I mean man I just don't get it, doesn't matter how much voltage or what I change I can't do 4.0Ghz stable... Anyway I am really happy with the performance of this machine it is awesome! Fastest computer ever that's all there is to it.... My read, write and copy are incredible so I'm cool with it....

It's the heat, you are running too hot guaranteed, just like me. With better cooling you would be able to lower the volts and up the clocks. With the stock Intel cooler I could not get the Core i7 940 past 3.4GHz to be rock solid stable. After upgrading to the CoolerMaster V8 I can do 3.99GHz rock solid stable, but not higher. I noticed too that a lot of people with better cooling are managing to lower volts and get higher overall clocks. Currently, I am settled on the settings I mentioned earlier as the balance between volts and clocks is the best. Need to put this under some serious water to go higher. Currently under Small FFTs the temps peak at 85C, under Large FFTs around 80C. Also, I reviewed the Intel technical specifications for Core i7 and they say that min and max voltages are 0.8V and 1.375V respectively.

[Ace-a-Rue]

Here are my 24/7 settings so far but I just can't prime more than 3 hours with one more tick on the Bclk CAN'T DO IT! So I am running 210X19 at like 3.985Ghz (gay).. I mean man I just don't get it, doesn't matter how much voltage or what I change I can't do 4.0Ghz stable... Anyway I am really happy with the performance of this machine it is awesome! Fastest computer ever that's all there is to it.... My read, write and copy are incredible so I'm cool with it....

what about raising your memory timings?...have you tried that?