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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 53

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post #521 of 9565
Used this guide to take my 2500k to 4.8ghz. Tried 4.9ghz but it wasn't stable. I would be able to boot, but usually 3-5 minutes into prime95 it fails. I've given it 1.46v and it still isn't stable, so i'll stick with 4.8ghz @ 1.41v. smile.gif
     
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post #522 of 9565
Hi guys, I'm new to overclocking and this is my current stats. I've followed everything on the guide, with +0.005V Offset, managed to run P95 blend for 1.5 hours without any problems at all. I know my temperature is a little higher but I'm using this PC for gaming so yea shouldn't be loading the CPU 100% all the time isn't it?

I've tried 4.5Ghz but it crashes, but seems like its memory rather than voltage issue because my software crashes, eg hwinfo , prime95 , cpu-z.
And during 4.5Ghz, whenever I start my firefox (with 4 tabs), it will crash. I tried increasing offset to 0.010 and 0.015 but its still the same.
I left all my ram settings at auto (1.5v auto DRAM volt). Anyone know how to solve my issue? If not I'll probably just stay at 4.4Ghz
Anyway below is my rig:

CPU: i5-3570K
MOBO: ASRock Z77 Extreme4
CPU Cooler: CoolerMaster Hyper 212 EVO
HDD: Western Digital 2TB Caviar Black SATA3
SSD: Intel 520 Series 120GB
GPU: Sapphire Radeon HD7850 OC Edition
RAM: G.Skill Ripjaw 1600Mhz 8GB
PSU: FSP Aurum Gold Series 550W Modular
Optical Drive: LG 24X
Casing: NZXT Phantom 410 White USB 3.0
OS: Windows 7 Home Premium OEM
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post #523 of 9565
Thread Starter 
Quote:
Originally Posted by kingsen View Post

Hi guys, I'm new to overclocking and this is my current stats. I've followed everything on the guide, with +0.005V Offset, managed to run P95 blend for 1.5 hours without any problems at all. I know my temperature is a little higher but I'm using this PC for gaming so yea shouldn't be loading the CPU 100% all the time isn't it?

I've tried 4.5Ghz but it crashes, but seems like its memory rather than voltage issue because my software crashes, eg hwinfo , prime95 , cpu-z.
And during 4.5Ghz, whenever I start my firefox (with 4 tabs), it will crash. I tried increasing offset to 0.010 and 0.015 but its still the same.
I left all my ram settings at auto (1.5v auto DRAM volt). Anyone know how to solve my issue? If not I'll probably just stay at 4.4Ghz
Anyway below is my rig:

CPU: i5-3570K
MOBO: ASRock Z77 Extreme4
CPU Cooler: CoolerMaster Hyper 212 EVO
HDD: Western Digital 2TB Caviar Black SATA3
SSD: Intel 520 Series 120GB
GPU: Sapphire Radeon HD7850 OC Edition
RAM: G.Skill Ripjaw 1600Mhz 8GB
PSU: FSP Aurum Gold Series 550W Modular
Optical Drive: LG 24X
Casing: NZXT Phantom 410 White USB 3.0
OS: Windows 7 Home Premium OEM

Took me quite awhile to figure out why your temps were so high (compared to vcore). You're on Ivy Bridge, not Sandy Bridge! tongue.gif

So first, your temps look fine. Your chip wont even throttle until 105C so at 80C max you're doing great. Remember that in all practice, no game will ever get you max temps. This is why some people even let overclocks go as high as 90C in a stresser.

Second, what you think is a memory issue is really a CPU issue. wink.gif Looks like you got enough juice to boot, but if you try to put the processor to full running state (ie. opening a program) it can't handle it and it crashes. Although you did try more vcore, you probably didn't do enough. Or it could be a couple of other things.

But for now just leave it at 4.4GHz if you don't want to deal with the extra voltage. thumb.gif

Don't forget a 4.4GHz on an Ivy Bridge is nearly equivalent to 4.6GHz on a Sandy Bridge!! That is quite a feat with no voltage change! biggrin.gif
post #524 of 9565
Quote:
Originally Posted by kennyparker1337 View Post

Took me quite awhile to figure out why your temps were so high (compared to vcore). You're on Ivy Bridge, not Sandy Bridge! tongue.gif
So first, your temps look fine. Your chip wont even throttle until 105C so at 80C max you're doing great. Remember that in all practice, no game will ever get you max temps. This is why some people even let overclocks go as high as 90C in a stresser.
Second, what you think is a memory issue is really a CPU issue. wink.gif Looks like you got enough juice to boot, but if you try to put the processor to full running state (ie. opening a program) it can't handle it and it crashes. Although you did try more vcore, you probably didn't do enough. Or it could be a couple of other things.
But for now just leave it at 4.4GHz if you don't want to deal with the extra voltage. thumb.gif
Don't forget a 4.4GHz on an Ivy Bridge is nearly equivalent to 4.6GHz on a Sandy Bridge!! That is quite a feat with no voltage change! biggrin.gif

Hey kenny you really made my day!! I thought I've gotten a bad bad chip, but you just lightened up my day thumb.gif

Need more info on ivy, I was worrying 70+ temp is bad, but now I realize most of other user compared it to sandy, which runs cooler by default. biggrin.gif
post #525 of 9565
Quote:
Originally Posted by mitchrapp1 View Post

Thank you for this guide. I used all the same settings, except enabled Internal PLL Overvoltage. I have an i7 2700k, Asrock Z68 Extreme 3 Gen 3 MB, 16 GB (4x4) Kingston Hyper-X DDR3-1600 (1.65V) RAM, and a CoolerMaster Hyper 212+.
I can run 4.8 GHz at a +0.125 offset. That gives me a vcore of around 1.36V (as reported in CPU-Z). It's been running Prime95 stable for about 1 hour. The thing that concerns me is the heat. Load values are in the high 80s - low 90s. Is this expected for 1.36V?
Anything I can do to lower the heat? Or is this the best that can be expected on air?

Ok, so I decided to go back down to 4.5 GHz. I have a +0.020 offset with 1.25V in CPU-Z. It ran Prime 95 blend for 12 hours with no failures and temps in the 60s. Was pleased with it, but now, all of a sudden, I get random reboots (no BSODs). I'm not doing anything CPU-intensive when these reboots occur. What could be the cause?
post #526 of 9565
I would say that your idle voltage is too low. For some reason ive seen many people run blend and pass but then fail at idle. I personally ran SmallFFT and havent had a problem w/ full load or idle.

You probably need to increase your offset because that will increase you idle voltage along w/ you full load voltage. Maybe try a +0.025 or +0.030 and see if the problem goes away.
Edited by Lucky 23 - 5/9/12 at 10:27am
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post #527 of 9565
Thread Starter 
Quote:
Originally Posted by mitchrapp1 View Post

Quote:
Originally Posted by mitchrapp1 View Post

Thank you for this guide. I used all the same settings, except enabled Internal PLL Overvoltage. I have an i7 2700k, Asrock Z68 Extreme 3 Gen 3 MB, 16 GB (4x4) Kingston Hyper-X DDR3-1600 (1.65V) RAM, and a CoolerMaster Hyper 212+.
I can run 4.8 GHz at a +0.125 offset. That gives me a vcore of around 1.36V (as reported in CPU-Z). It's been running Prime95 stable for about 1 hour. The thing that concerns me is the heat. Load values are in the high 80s - low 90s. Is this expected for 1.36V?
Anything I can do to lower the heat? Or is this the best that can be expected on air?

Ok, so I decided to go back down to 4.5 GHz. I have a +0.020 offset with 1.25V in CPU-Z. It ran Prime 95 blend for 12 hours with no failures and temps in the 60s. Was pleased with it, but now, all of a sudden, I get random reboots (no BSODs). I'm not doing anything CPU-intensive when these reboots occur. What could be the cause?

Quote:
Originally Posted by Lucky 23 View Post

I would say that your idle voltage is too low. For some reason ive seen many people run blend and pass but then fail at idle. I personally ran SmallFFT and havent had a problem w/ full load or idle.

You probably need to increase your offset because that will increase you idle voltage along w/ you full load voltage. Maybe try a +0.025 or +0.030 and see if the problem goes away.

An unstable overclock doesn't cause random reboots as far as I know. Seems like you ran into another issue.

The most common causes of random reboots are:
  1. Heat - Limit reached...shuts the chip down..reboots.
  2. Faulty PSU - Not enough voltage being sent out...hardware shuts off due to not enough power...reboots.
  3. Hardware Issue - A faulty mobo, or RAM chip could cause this also.
  4. Driver Issue - Some drivers can conflict so harshly, they cause a reboot.

There is an issue with C states causing BSOD during idle while using Offset mode, but again you said no BSOD... so most likely not that. Could be worth a shot.

If you passed 12 hours of prime, I see no way how your chip is that unstable. I have had much better stability with much less testing.
post #528 of 9565
Quote:
Originally Posted by kennyparker1337 View Post

An unstable overclock doesn't cause random reboots as far as I know. Seems like you ran into another issue.
The most common causes of random reboots are:
  1. Heat - Limit reached...shuts the chip down..reboots.
  2. Faulty PSU - Not enough voltage being sent out...hardware shuts off due to not enough power...reboots.
  3. Hardware Issue - A faulty mobo, or RAM chip could cause this also.
  4. Driver Issue - Some drivers can conflict so harshly, they cause a reboot.
There is an issue with C states causing BSOD during idle while using Offset mode, but again you said no BSOD... so most likely not that. Could be worth a shot.
If you passed 12 hours of prime, I see no way how your chip is that unstable. I have had much better stability with much less testing.

Well, I've upped the offset to +0.030V and it's been stable on normal use/idle for the past 13 hours with no reboots. I'll update if I get any more reboots.
post #529 of 9565
Thread Starter 
Quote:
Originally Posted by mitchrapp1 View Post

Quote:
Originally Posted by kennyparker1337 View Post

An unstable overclock doesn't cause random reboots as far as I know. Seems like you ran into another issue.
The most common causes of random reboots are:
  1. Heat - Limit reached...shuts the chip down..reboots.
  2. Faulty PSU - Not enough voltage being sent out...hardware shuts off due to not enough power...reboots.
  3. Hardware Issue - A faulty mobo, or RAM chip could cause this also.
  4. Driver Issue - Some drivers can conflict so harshly, they cause a reboot.
There is an issue with C states causing BSOD during idle while using Offset mode, but again you said no BSOD... so most likely not that. Could be worth a shot.
If you passed 12 hours of prime, I see no way how your chip is that unstable. I have had much better stability with much less testing.

Well, I've upped the offset to +0.030V and it's been stable on normal use/idle for the past 13 hours with no reboots. I'll update if I get any more reboots.

Upping the vcore is always worth a shot! thumb.gif

I hope thats all it was though. Seemed very weird to me. I doubt this is the issue, but Windows can be set to skip BSOD (Kernel) dumps, and just instead reboot. Perhaps something was causing the kernel dump to fail... headscratch.gif. How in the world you passed that long in prime and still were "unstable" is beyond me. Don't think I've ever seen this situation occur.


Implementing several updates over the days on the guide to include Ivy Bridge more properly.
post #530 of 9565
Hi all, I'm wondering if anyone can help me understand the relationship between the VID at a given multiplier and the Vcore we see in CPUz under p95 load. My set up always shows a lower Vcore than VID... Sometime a lot lower. Why would this result in a stable setup? I mean, I thought the VID was the volts needed by the chip at that multi? So seeing vcore so much lower .... Well, makes me nervous that it's just waiting for the right moment to bsod. Even worse, under some stress conditions the VID will actually change (both core temp and real temp).

Is the CPUz vcore supposed to be the same as bios vcore? Or >= VID?

Or is this just a stupid irrelevant question?
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