OC 4Ghz at very low temperature

Looks like some motherboard trick does it. No idea which mobo and what's the procedure.:rolleyes: Hoping that, like the AMD's, the trick will land in google anytime soon.
 
had mine stable enough at 4.6 to do some benchies haven't tried any higher! might give it a go tonight as i have got a few beers in :)
 
more Voltage under water to control temps, theres not much temp differnce between 1.28V (my 24/7 4.2clock) and [email protected] saying that it wouldnt last longer than 10min under stress. i think it would be possible to get stable at 4.6 but that is way beyond my O/C skills, had 4.4 stable until i realised i had the memory set to auto and it was using 1.75V!! havent been able to get it stable without higher voltages than i would run 24/7 at!
 
Sayso said:
more Voltage under water to control temps, theres not much temp differnce between 1.28V (my 24/7 4.2clock) and [email protected] saying that it wouldnt last longer than 10min under stress. i think it would be possible to get stable at 4.6 but that is way beyond my O/C skills, had 4.4 stable until i realised i had the memory set to auto and it was using 1.75V!! havent been able to get it stable without higher voltages than i would run 24/7 at!
Click to expand...

it would be nice if rich from ocuk will built 4.6ghz oc bundles in the future if the budget is spot on.
 
i think it wouldn't be worth there while would take a voltage jedi a long time to get stable then there would be no guarantee, perhaps they could do one with the 975!!
at least with the 920 4Ghz bundle they know 85% of the CPUs will do that at 1.3V, if i was them i would just set the Vcore to 1.3V put everything else at 2 notches above minimum and send them out...proberly only 10% of bundles wouldnt be able to do that and there would be no time wasted spending days testing
******IM NOT SAYING THEY DO THIS******
 
Sayso said:
i think it wouldn't be worth there while would take a voltage jedi a long time to get stable then there would be no guarantee, perhaps they could do one with the 975!!
at least with the 920 4Ghz bundle they know 85% of the CPUs will do that at 1.3V, if i was them i would just set the Vcore to 1.3V put everything else at 2 notches above minimum and send them out...proberly only 10% of bundles wouldnt be able to do that and there would be no time wasted spending days testing
******IM NOT SAYING THEY DO THIS******
Click to expand...

But do they....?;)
 
That's gotta be photoshopped, I have never heard of anyone being able to unlock the CPU multi on a 920..

@Bulldog, you will need to use much higher Vcore and Vtt if you want to clock higher than 4.2GHz..

I got mine CPUZ verified at 4.6GHz (see the CPUZ link in my sig) but I had to set Vcore to 1.415v in the BIOS to get it there, and I only tested this with Super PI as I know for a fact that it would BSOD as soon as I tried running LinX or Prime95.

Also you will have to set the RAM multi to 6x and uncore to 13x otherwise it will refuse to POST..

However, if you have 1866MHz or 2000MHz RAM then you can stick with the 8x mem multi and 16x uncore.
 
I found other way to overclock 4.1ghz at just 1.184vcore (at cpuz) but 1.275vcore at the bios) and it had stable after linx (1 hour) passed and prime95 for 2 hours. I use 196 x 20 (3.92ghz) and lower qpi at 1.2v and ioh at 1.1v and dram at 1.5v and cpu pll at 1.8v, qpi pll at 1.1v and finally ich i/o at 1.5v. Nice temperature at 68C full max at 4.1Ghz.

http://valid.canardpc.com/show_oc.php?id=702155
 
DavyBoy said:
That's gotta be photoshopped, I have never heard of anyone being able to unlock the CPU multi on a 920..

@bulldog, you will need to use much higher Vcore and Vtt if you want to clock higher than 4.2GHz..

I got mine CPUZ verified at 4.6GHz (see the CPUZ link in my sig) but I had to set Vcore to 1.415v in the BIOS to get it there, and I only tested this with Super PI as I know for a fact that it would BSOD as soon as I tried running LinX or Prime95.

Also you will have to set the RAM multi to 6x and uncore to 13x otherwise it will refuse to POST..

However, if you have 1866MHz or 2000MHz RAM then you can stick with the 8x mem multi and 16x uncore.
Click to expand...

What is the Vtt voltage set to ? I got memory ram support of 1866Mhz. I will try your setting later to see if I get it at 4.6ghz.
 
I think I had QPI set to 1.355v or 1.375v, I can't quite remember.

I also needed to have QPI PLL voltage at 1.240v otherwise it wouldn't POST at all..

Someone told me a while back that lowering CPU PLL can help with stability when trying for high Bclk, whether this is true or not I don't know, but I currently have mine set to 1.300v instead of 1.800v for 4.2GHz and I am stable 24/7.. though I seem to need a lot of Vcore for 4.2GHz, I have 1.3500v Vcore in the BIOS for 4.2..

It shouldn't really matter much though tbh as I will be going custom WC as soon as I get my HK3 block..

What case are you using again bulldog, is it the Antec 1200?
 
DavyBoy said:
I think I had QPI set to 1.355v or 1.375v, I can't quite remember.

I also needed to have QPI PLL voltage at 1.240v otherwise it wouldn't POST at all..

Someone told me a while back that lowering CPU PLL can help with stability when trying for high Bclk, whether this is true or not I don't know, but I currently have mine set to 1.300v instead of 1.800v for 4.2GHz and I am stable 24/7.. though I seem to need a lot of Vcore for 4.2GHz, I have 1.3500v Vcore in the BIOS for 4.2..

It shouldn't really matter much though tbh as I will be going custom WC as soon as I get my HK3 block..

What case are you using again bulldog, is it the Antec 1200?
Click to expand...

Yes, it a antec 1200 case. But, I will going to buy a new Corsair Obsidian 800D case with new Corsair HX 1000W ATX Modular SLI Compliant Power Supply with water custom cooling next year around in March / April as my wife given me go ahead to spend at least £600 on my budget. I also want a HK3 block and bitspower etc.
 
That Corsair case looks awesome.

I will be buying the Silverstone TJ07 BW in November, it is a much better case for watercooling than my TJ10.

I am looking forward to getting my new case!
 
Which case Silverstone TJ07 BW or Corsair Obsidian 800D is better for water custom cooling ? Maybe Rich will advise me this because Rich done a lot of water custom cooling lately.
 
DavyBoy said:
I think I had QPI set to 1.355v or 1.375v, I can't quite remember.

I also needed to have QPI PLL voltage at 1.240v otherwise it wouldn't POST at all..

Someone told me a while back that lowering CPU PLL can help with stability when trying for high Bclk, whether this is true or not I don't know, but I currently have mine set to 1.300v instead of 1.800v for 4.2GHz and I am stable 24/7.. though I seem to need a lot of Vcore for 4.2GHz, I have 1.3500v Vcore in the BIOS for 4.2..

It shouldn't really matter much though tbh as I will be going custom WC as soon as I get my HK3 block..

What case are you using again bulldog, is it the Antec 1200?
Click to expand...


I havent touched the CPU PLL at all, if I lower it will it help temps.
 
Last edited:
@ Bulldog
Tried 4.5 just now with HT on Using Noctua but it needed 1.425 Vcore and idling at 47-52 across all cores.

http://valid.canardpc.com/show_oc.php?id=702196

20fomxi.jpg


Will try 4.6 with HT on in a minute then maybe we can compare notes as to the clocking figures.
 
Our Temps as similar but your voltage is lower than mine. Nice board and chips you've got there.:p As for 4.6 still can't boot to windows even with 1.5250 volts.:confused: I'll try with HT off.:rolleyes:
 
You must log in or register to reply here.
Back
Top Bottom