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Old November 4, 2011, 06:55 PM
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Default 2500k overclocking

Hey guys!

Following this guide : Official ASUS P8P67 Series Overclocking Guide and Information

This is where i ended up tonight : http://i242.photobucket.com/albums/f...1455v_LOAD.jpg

Considering that never will the CPU be stressed that much for day to day tasks and gaming, are those temps safe for 24\7 ?

Specs in SIG!

Here's what i changed in the bios :

Ai Overclock Tuner : Manual
Turbo Ratio : By per core : 48 set for all 4 cores
Internal PLL Overvoltage : Enabled
Memory Frequency : 1600mhz
Load-Line Calibration : Ultra High
VRM Frequency : Manual set to 350
Phase Control : Extreme
Duty Control : Extreme
CPU Current Capability : 130%

CPU Voltage : Manual set to 1.455v
DRAM Voltage : 1.500v

I haven't touched anything else related to overclocking.


Now, during load, CPU-Z reads 1.432v-1.440v and during IDLE, it reads 1.448v

Before that, I had tried setting Manual CPU Vcore to 1.450v and one core crashed after a few mins during Prime95 Blend test ...

So far, 1h15m stable Prime95 Blend test @ 1.455v But temps are concerning me. I have a Noctua NHD-14 and used MX-2 compound.

UPDATE: Well, after an hour and 20 mins, one core crashed during Prime95 ...

You guys have any idea on how i could improve stability without adding more CPU Vcore?

Thanks!
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Old November 4, 2011, 07:00 PM
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Yeah. Drop it to 4.5 then use BLCLK to get 4.8

Or just drop it to 4.5 and use a metric ton less voltage and just be happy.

300mhz isn't worth the extra voltage / heat in my opinion

I've had 2600K's that will do 4.5ghz on STOCK voltage, but to do 4.8 or 5.0ghz you're looking at 100C temps and nearing max voltages.
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Old November 4, 2011, 07:12 PM
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Have you tried using the offset voltage mode instead of fixed??
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Old November 4, 2011, 07:16 PM
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what are your temps like at 4.5 and then at 4.8?
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Old November 4, 2011, 07:38 PM
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Hey guys, thanks for the quick replies.

Temps are great for 4.5Ghz + I'm sure i could drop the voltage a bit and still be stable :

http://i242.photobucket.com/albums/f..._136v_IDLE.jpg
http://i242.photobucket.com/albums/f...36v_LOAD-1.jpg

I haven't tried Offset voltage as i don't understand at all how it works! Need help on that! I might decide to go with 4.5-6Ghz with lowest voltage and I sure would like it to have voltage and frequency drop when IDLE so i would use Offset Voltage!
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Old November 4, 2011, 07:45 PM
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Those are great temps at load.

I had i72600k and a z68x-ud4-b3 mobo. That one I didnt change anything, but the mulitplier to 45 and disabled the turbo boost. Kept everything the same even the voltage to auto. And also changed the timing for the ram to match the factory settings for the ram. At 4.5ghz and vcore at auto was at 1.36 but never actually got there, and temps at full load never hit 58.

I was using a prolimatech megha with 2 scythe slip stream fans 1900 rpm in push pull config.

I also tried 5.0ghz, but to be honest temps did get hot. But at 4.5ghz, life was beautiful, everything was fast. Just keep yours at 4.5ghz for 24/7 use, as long as the temps are under 60 degrees at load, they are beautiful!

nice set up!


Quote:
Originally Posted by Patriote View Post
Hey guys, thanks for the quick replies.

Temps are great for 4.5Ghz + I'm sure i could drop the voltage a bit and still be stable :

http://i242.photobucket.com/albums/f..._136v_IDLE.jpg
http://i242.photobucket.com/albums/f...36v_LOAD-1.jpg

I haven't tried Offset voltage as i don't understand at all how it works! Need help on that! I might decide to go with 4.5-6Ghz with lowest voltage and I sure would like it to have voltage and frequency drop when IDLE so i would use Offset Voltage!
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Old November 4, 2011, 07:46 PM
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75 C is absolutely fine IMO. Plenty of headroom for when summer rolls around.
Though you may run into trouble if you use LinX+AVX -- you might be hitting 85C+ with the CPU under full full full ridiculous load.
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Old November 4, 2011, 07:48 PM
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Quote:
Originally Posted by zoob View Post
75 C is absolutely fine IMO. Plenty of headroom for when summer rolls around.
Though you may run into trouble if you use LinX+AVX -- you might be hitting 85C+ with the CPU under full full full ridiculous load.
I believe LinX and intel burn test are about the same when stress testing and warming up the cpu, i think intel burn test is more brutal, cant check right now no pc but my wife's laptop:(
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Old November 4, 2011, 08:00 PM
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Well, isn't 75c high? Because i just set CPU Vcore to 1.46v which gives 1.448v during LOAD and CPU seemed stable.

I use Prime95 Blend test to stress the CPU. Is that allright? Should i Use something else?

Thanks guys!

PS: Can someone explain me how exactly Offset VCore works?
__________________
- Asus P8Z68-V PRO
- Intel I5 2500k @ 4.5Ghz (for now)
- Asus Geforce 580GTX DirectCUII Fermi
- 16GB Corsair Vengeance Low Profile
- Ultra X3 1000 Watt
- Asus Xonar DX 7.1 \ Klipsch Promedia 2.1 THX
- Corsair Vengeance 1300 Gaming Headset
- Crucial M4 SSD 128GB \ WD Caviar Black 1TB
- CoolerMaster 690II Advanced
- Dell UltraSharp 24''
- Noctua NH-D14
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Old November 4, 2011, 08:05 PM
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try using linx, just do 20 cycles!
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