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Stable at 4,9GHz and want to go to 5GHz - Page 2

post #11 of 39
Thread Starter 
Quote:
Originally Posted by Mumbles37;15153214 
And about this:

To use offset you basically start with VID (which is more or less the base set voltage your particular CPU runs at a given speed i.e. it varies from chip to chip), and increase or decrease voltage from there. For you, you're looking at +1.2v or probably even more depending on your VID to get up to 1.5v. The benefit of offset is that your voltage drops when the CPU is idle so you save power and heat, etc.

Whether offset helps in stability no one can really say for sure--it doesn't help my current chip, though one of my previous chips seemed to like it.

vccio does not need to be changed since you seem to be running your RAM at stock, and PCH should not be changed. One thing you can do is try to increase or decrease your CPU PLL, as some have reported enhanced stability. Again, varies from chip to chip; mine does best at 1.74v.

If I were you, I would turn on hyperthreading (that's the main benefit of the 2600K), set CPU to 4.7 or 4.8GHz, set CPU capability to 120%, and use normal voltage set at 1.4v with ultrahigh or extreme LLC. Then I would test for stability and if stable, bump it down .01v, stability test, bump down one more notch, etc., etc. until I had a nice stable 4.8 or 4.7GHz at minimum voltage.

I don't think it's possible, no matter what you do, for your chip to do 5GHz under 1.5v. I'm in the same boat.


So, what you suggest is to try this:
- bclk 100
- multiplier 48 or 49 (if I want and if possible)
- ram memory set to manual ddr3-1600 (it is stock memory)
- PLL enabled
- EPU power disabled
- LLC ultrahigh (or extreme)
- VRM set to manual 350
- phase control and duty control (I don´t know what they are) set to extreme
- cpu capability set to 120%
- cpu voltage 1.400V or instead of this offset mode -0,010V ?
- dram voltage 1.60000
- cpu pll to increase or decrease? I don´t know which value to put here...
- vccio and pch voltage set to auto
- hypertreading enabled
- EIST and CPU C1E enabled
- CPU C3 and C6 reports disabled

Can you correct it?

Tks

harpsi
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post #12 of 39
Quote:
Originally Posted by harpsi;15158370 
So, what you suggest is to try this:
- bclk 100
- multiplier 48 or 49 (if I want and if possible)
- ram memory set to manual ddr3-1600 (it is stock memory)
- PLL enabled
- EPU power disabled
- LLC ultrahigh (or extreme)
- VRM set to manual 350
- phase control and duty control (I don´t know what they are) set to extreme
- cpu capability set to 120%
- cpu voltage 1.400V or instead of this offset mode -0,010V ?
- dram voltage 1.60000
- cpu pll to increase or decrease? I don´t know which value to put here...
- vccio and pch voltage set to auto
- hypertreading enabled
- EIST and CPU C1E enabled
- CPU C3 and C6 reports disabled

Can you correct it?

Tks

harpsi

Yep that all looks good. I'd try lowering CPU PLL after you've found your stable clock. I've heard of raising it but most of the time people around here lower it, and it's always good to run less power (i.e. less heat) through your cpu.

CPU to 1.4 and work down (or up if you're really unlucky like me) to find a stable minimum voltage. If you do offset you're going to have to go + a bit of voltage... but nobody knows for sure until you check in CPU-Z what it's at.

Keep RAM at stock as you have it, and after your CPU is set you can try to oc or adjust the timings if you want.

Looking good, let us know how it works out.

Edit: P.S. and if you try 4.9 you'll need to adjust your voltage accordingly. It might be a good idea to find a stable 4.8 to get a better feel for your chip, then try for 4.9 after.
Edited by Mumbles37 - 10/3/11 at 5:05am
post #13 of 39
Thread Starter 
Quote:
Originally Posted by Mumbles37;15158971 
Yep that all looks good. I'd try lowering CPU PLL after you've found your stable clock. I've heard of raising it but most of the time people around here lower it, and it's always good to run less power (i.e. less heat) through your cpu.

CPU to 1.4 and work down (or up if you're really unlucky like me) to find a stable minimum voltage. If you do offset you're going to have to go + a bit of voltage... but nobody knows for sure until you check in CPU-Z what it's at.

Keep RAM at stock as you have it, and after your CPU is set you can try to oc or adjust the timings if you want.

Looking good, let us know how it works out.

Edit: P.S. and if you try 4.9 you'll need to adjust your voltage accordingly. It might be a good idea to find a stable 4.8 to get a better feel for your chip, then try for 4.9 after.

I will let you know for sure smile.gif

Anyway, CPU PLL at which value?

The offset we wait for the next step. I didn´t understand exactly what it is and what are the influences on the general procedure...

harpsi
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post #14 of 39
I started at 1.7 and worked up from there... Ended up at 1.74, my sweet spot.
post #15 of 39
Thread Starter 
Quote:
Originally Posted by Mumbles37;15159671 
I started at 1.7 and worked up from there... Ended up at 1.74, my sweet spot.

What does it mean, to increase or decrease PLL voltage?

harpsi
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post #16 of 39
1.700v is by far more stable than 1.740v and 1.760v. I've had the best luck at 1.700v. My 2500k is 5ghz stable with 1.375v idle and 1.392v load with 1.700v PLL, 1.175v VCCIO helps also.
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post #17 of 39
I meant decrease pll from 1.8 to 1.7 initially, check, bump up step by step to the best value for you. Mine is 1.74, hambone's is 1.7.
post #18 of 39
Thread Starter 
After some holidays, I am back to tests.

I decided to go lower with the multiplier just for now and the system seems to be stable, even with just 5 hours of prime95.

So, here are my specs for now:
- bclk 100
- multiplier 48 (49 will be the next step)
- ram memory set to manual ddr3-1600 (it is stock memory)
- PLL enabled
- EPU power disabled
- LLC ultrahigh
- VRM set to manual 350
- phase control and duty control (I don´t know what they are) set to extreme
- cpu capability set to 130%
- cpu voltage 1.450V
- dram voltage 1.60000
- cpu pll 1.70
- vccio and pch voltage set to auto
- hypertreading disabled
- EIST and CPU C1E enabled
- CPU C3 and C6 reports auto

Temperatures with Real temp are going to a maximum of 71ºC and CPU-Z shows 1.440 to 1.448 of core voltage.

Is this good?

And to go to a multiplier of 49 what do I need to touch?

harpsi
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post #19 of 39
more vcore I would suspect, however just try changing the multiplier and see how far you get before you have to add vcore.
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post #20 of 39
Thread Starter 
Quote:
Originally Posted by munaim1;15218395 
more vcore I would suspect, however just try changing the multiplier and see how far you get before you have to add vcore.

Ok, and if vcore is not enough, it can´t go higher and higher... Maybe I need to touch other values, right? However I will try just the multiplier and hypertreading enabled.

By the way how did you get 5,1GHz with your i5? Very nice wink.gif

harpsi
Edited by harpsi - 10/7/11 at 5:19pm
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