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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 788

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post #7871 of 9565
I was able to overclock my i5 2500k to 4.5Ghgz using 45 as multiplier, +0.020 in OFFSET and + 0.008 in TURBO setting.

I run Prime95 for 25min, no problems. Also run SuperPI in loop mode for ~10min, no problem.

(I was getting BSOD codes 101 and 124 before getting stable with those values).

CPU-Z reports the CPU idle with 0.948 vcore (1.6Ghz) and full load around 1.315 vcore (4.5Ghz). Temps in idle are at 28ºC and full load are at 61ºC. I'm using Corsair H100 as cooling solution.

I feel this CPU can go way higher but 4.5Ghz is alright for me.


I would like to lower the idle speed to around 1Ghz, is it possible? I read that the OFFSET mode allows the CPU to vary from 1.6ghz to the higher limit, but how to lower the idle frequency?

Thanks,

Gaucho
Edited by Gaucho - 3/5/14 at 8:47am
post #7872 of 9565
Quote:
Originally Posted by Gaucho View Post

I was able to overclock my i5 2500k to 4.5Ghgz using 45 as multiplier, +0.020 in OFFSET and + 0.008 in TURBO setting.

I run Prime95 for 25min, no problems. Also run SuperPI in loop mode for ~10min, no problem.

(I was getting BSOD codes 101 and 124 before getting stable with those values).

CPU-Z reports the CPU idle with 0.948 vcore (1.6Ghz) and full load around 1.315 vcore (4.5Ghz). Temps in idle are at 28ºC and full load are at 61ºC. I'm using Corsair H100 as cooling solution.

I feel this CPU can go way higher but 4.5Ghz is alright for me.


I would like to lower the idle speed to around 1Ghz, is it possible? I read that the OFFSET mode allows the CPU to vary from 1.6ghz to the higher limit, but how to lower the idle frequency?

Thanks,

Gaucho

Unfortunately 16x is the lowest multiplier. The only way to go lower is to use BCLK (dont do it).
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post #7873 of 9565
Regarding memory: who has 32Gb of RAM @2133Mhz?

My ASRock Ext3Gen3 supports up to 32Gb @ 2133 and I'd like to upgrade into this, but the only supported 8Gb memory module listed on the compatible chart is one from Kingston, KHX2133C11D3T1K2/16GX, that I can't find anywhere.

So my question is: is there someone running this mobo with a different kit of memories (that actually work @ 2133mhz? tongue.gif)

Regards,
post #7874 of 9565
Hi.
So here i am smile.gif

45 / offset +0.05 / turbo +0.04 / CPULLC lvl 2
Load temps was 50-57
Vcore in CPU-Z was 1.304 - 1.312 most of the time.

Here is screen shot:


Can i get more of that chip (46-47)? What should be my next steps? I did try to go with 46 / offset +0.05 / turbo up to 0.016 but all i got in load was WHEA.
    
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post #7875 of 9565
Quote:
Originally Posted by spythere View Post

Hi.
So here i am smile.gif

45 / offset +0.05 / turbo +0.04 / CPULLC lvl 2
Load temps was 50-57
Vcore in CPU-Z was 1.304 - 1.312 most of the time.

Here is screen shot:


Can i get more of that chip (46-47)? What should be my next steps? I did try to go with 46 / offset +0.05 / turbo up to 0.016 but all i got in load was WHEA.

WHEA is a sign of instability, but it also shows that you are close. I think your temps are plenty good enough that you could go higher, Your VCore doesn't leave much room though. It is generally suggested to stay below 1.35, but some have run higher for quite a while now with little to no degradation.

Also, running prime95 for 10 minutes doesnt even get out of the first fft test. The temps will go up quite a bit from the 15-30 minute mark. You should run it for 1 hour minimum between tweaks, and for a full 24 hours when you think you have dialed it in.
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post #7876 of 9565
Quote:
was able to overclock my i5 2500k to 4.5Ghgz using 45 as multiplier, +0.020 in OFFSET and + 0.008 in TURBO setting.

I run Prime95 for 25min, no problems. Also run SuperPI in loop mode for ~10min, no problem.

(I was getting BSOD codes 101 and 124 before getting stable with those values).

CPU-Z reports the CPU idle with 0.948 vcore (1.6Ghz) and full load around 1.315 vcore (4.5Ghz). Temps in idle are at 28ºC and full load are at 61ºC. I'm using Corsair H100 as cooling solution.

I feel this CPU can go way higher but 4.5Ghz is alright for me.

Well I spoke too early, my overclock is not stable. It started failing again with 0x124 mostly and some 0x101.

So I increased OFFSET to +0.040 and TURBO to +0.008. Still getting errors. CPUZ was reporting vcore varying from 1.304 to 1.352. Also increased VTT from 1.047 to 1.057, to no avail. Temperatures around 60ºC

Then I changed the CPU Load-Line Calibration from level 2 to level 1. CPUZ immediately started reporting vcore from 1.408 to 1.496.... but no BSOD anymore, and temperatures raising to 78-80ºC

Then I lowered OFFSET to +0.015 and TURBO to +0.004. VTT back to 1.047. CPU Load-Line Calibration set to Level 1. Run Prime95 for 1hr, no problems. However CPU-Z still reports vcore from 1.372 to 1.440, which I consider a bit higher. Temps are still around 75-80ºC.

What can I do to lower vcore and temps? I'm using Corsair H100.

Check screenshot:


Let me know your comments.

Regards,
post #7877 of 9565
I am confused... U choose Vcore Normal... i put dynamic VID to normal too. I reboot, start Prime and Vcore jumps to 1.6V!!!!! i reboot and set dynamic VID to -0.19V cuz i have crap 2500K sample.
It work on 4,7Ghz with 1.44V... and i cant get it to boot like that. What am i doing wrong?
post #7878 of 9565
Thread Starter 
Quote:
Originally Posted by Gaucho View Post

Regarding memory: who has 32Gb of RAM @2133Mhz?

My ASRock Ext3Gen3 supports up to 32Gb @ 2133 and I'd like to upgrade into this, but the only supported 8Gb memory module listed on the compatible chart is one from Kingston, KHX2133C11D3T1K2/16GX, that I can't find anywhere.

So my question is: is there someone running this mobo with a different kit of memories (that actually work @ 2133mhz? tongue.gif)

Regards,

If they have the same voltage and timings as the Kingston, they should work. If so, they are exactly the same chips. The only thing that separates them is the source of the material and builder. In some cases, since branding companies share manufacturers, they might even have the same builder.

The "compatibility" list is made so that if you happen to get the other 99% of memory chips not on the list, they can just claim you didn't buy a supported type and choose to not help you. The compatibility list is more of a liability/promotion list as the board already states the max freq. accepted for it's memory.

Any rating provided that has "O.C." next to it means that the board does not guarantee that freq. to work, so some boards might not work all the time with those high end chips.

Here is your specifications:
Quote:
Supports DDR3 2133(OC)/1866(OC)/1600/1333/1066

So it supports up to 1600 guaranteed, and 2133 not guaranteed (ie. they can blame the problem on the memory manufacturer).

In most cases, people do not have trouble even with OC speeds. So I wouldn't worry.

For instance I am running 1866 OC on my board and it's does it plenty fine.
post #7879 of 9565
Hi all,

I'm new to this but after a long read through this thread from all the helpful people, I've managed to set my i5 2500k up to 4.5Ghz stable after 10 hours, and recently pushed it to 4.7Ghz. My main concern is the voltages I'm getting on CPU-Z. And I am using a Gigabyte board if that makes any difference.

I've turned off the 16x power saving so my CPU is always running at 47x 4.7Ghz, but at idle the voltages are around 1.389v. When I stress test the CPU with Prime95 and watch the voltage, it drops down to around 1.260v. Sorry I'm at work so I don't have exact numbers but my temps are okay running at around 62-68 with load, depending on ambient and after some adjustment of offsets I've gotten the 4.7Ghz running stable in prime for roughly 1 hour, I have not had a chance to test it further yet.

I primarily want to ensure I'm not going to burn out the CPU running it like this.

Thanks in advance!
Edited by Koozer - 3/10/14 at 4:59pm
post #7880 of 9565
Quote:
Originally Posted by Koozer View Post

Hi all,

I'm new to this but after a long read through this thread from all the helpful people, I've managed to set my i5 2500k up to 4.5Ghz stable after 10 hours, and recently pushed it to 4.7Ghz. My main concern is the voltages I'm getting on CPU-Z. And I am using a Gigabyte board if that makes any difference.

I've turned off the 16x power saving so my CPU is always running at 47x 4.7Ghz, but at idle the voltages are around 1.389v. When I stress test the CPU with Prime95 and watch the voltage, it drops down to around 1.260v. Sorry I'm at work so I don't have exact numbers but my temps are okay running at around 62-68 with load, depending on ambient and after some adjustment of offsets I've gotten the 4.7Ghz running stable in prime for roughly 1 hour, I have not had a chance to test it further yet.

I primarily want to ensure I'm not going to burn out the CPU running it like this.

Thanks in advance!

That is vdroop, and you can change load line calibration to defeat it. Unfortunately I do not have a giga board, and this is the ASRock overclocking guide, so I cant tell you exactly how your motherboard handles it, but I am pretty sure you can convince it to compensate for the vdroop in BIOS.
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