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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 607

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post #6061 of 9531
X2 ive never been a fan of speedfan. Run Core temp or real temp when OCing
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post #6062 of 9531
Finaly got my 2600k to play nice at 5.2 (after a long day trial&error) smile.gif

Vcore 1.544 !!!!! Moar VCOREEEE!!!!!

Temps are below 90s wink.gif lol

also gSkill ram 1866 @ 2133mhz 1.66v(something like that, but I didn't notice increasing the voltage made the system more stable...)



Is the cpu vcore too high for this clock and 24/7 use? Previously I had it at 1.504 -1.512 but was not stable at all, most of the time refised to boot! Than I made some changes and bumped right to 1.544 and no crashes at all.

I shall not dare to stress test this because it will go up in flames and probably fail. Hoever it is very stable I have rendered some 3d for 40 min while multitasking (watching flash videos & writting to disk). Also played gta 4 and even OC'ed my gpu and no crash/freeze.

Temps stayed below 90c at all times even when rendering.

My board is asrock p67 extreme 4 and it has held up quite nicely over the years(bought jan 2011). Perfect board! Today must have rebooted my comp 1000 times.tongue.gif
post #6063 of 9531
wowzerz! 105c on cores 2 and 3!

That can double as a furnace any day biggrin.gif
post #6064 of 9531
Quote:
Originally Posted by windowszp View Post

Vcore 1.544 !!!!! Moar VCOREEEE!!!!!

I shall not dare to stress test this because it will go up in flames and probably fail. Hoever it is very stable I have rendered some 3d for 40 min while multitasking (watching flash videos & writting to disk). Also played gta 4 and even OC'ed my gpu and no crash/freeze.
You're just begging for a new CPU with that amount of voltage you're pumping through the chip.
And you cannot call an overclock stable before you haven't stress tested it. Although arguably rendering is some kind of stress testing, it will probably not reveal all instabilities with the current setup. And wouldn't it just suck to lose 2 hours rendering time because the computer crashed when it was almost finished?


@Ketadine
You're running into thermal throttling with these temps, and actually your CPU might just shut down completely if it goes any higher.


@Lucky
There's still not much benefit in lowering the Vcore that much in idle, the power saving features will take care of most of that already. In fact, how much Vcore is provided largely depends on which power saving features are enabled.
It's probably nice to know how low you could go though.
post #6065 of 9531
Quote:
Originally Posted by Ketadine View Post

Thanks for all the advice! I've got a stable 4.4 GHz (at least for 15 min) with additional turbo voltage +.09v and around 1.35v from what Core Temp says and 1.288v from CPU-Z . Vcore temp is at +0.005v . 4.5 GHz hits the maximum temp it seems. I will stress it more as soon as I can.

RAM is at 2133 MHz 1.60v as per XMP profile, but I did manual set the base RAM to 133 MHz and DDR-2133 .

@spoonium , @Lucky 23: LLC is 0%, 50% or 100%. Set to 50%

@Lucky 23: The four power limits( long duration, short duration, current limit) cannot be changed, the only thing that I can change is the Long Duration Maintained which is between 1-56 seconds.

I've added idle temps at 16x and CPU-z full load voltage.

I also have a question: I've tried CPU-Z and Core Temp, but they are showing me different voltages. Also, Core Temp and SpeedFan show different temperatures. Which one of this programs is more accurate for temp and / or voltage ?
Warning: Spoiler! (Click to show)

Sadly, you have reached the thermal wall. This is why people run custom water loops and delid their processors. When stress testing, you should consider anything over 98C a fail, as that is when the processor will drastically reduce performance to save the chip from overheating, the processor will power off at 106. There are some things you can try to bring temperatures down, such as replace the TIM in between the IHS and the cooler with an aftermarket TIM, you could also upgrade your cooler, or you could try re-evaluating the importance of properly placed case fans. IVY gets HOT! I have delidded my processor and lapped the IHS to lower my temperatures, but both will void your warranty and are not for the faint of heart.

15 minutes stress testing will not cut it, it is suggested to test for at least an hour, and upwards of 24 hours if maintaining stability is essential for your workload. Dropping the LLC% will reduce the voltage droop under load, and provide a more even voltage, however voltage spikes are higher when dropping LLC, 50% should do you just fine. Your chip still has headroom for 45x with voltage, but you need to get those temperatures down and KEEP THEM DOWN if you want to go higher.
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post #6066 of 9531
So to illustrate my point, I've made a few tests with different offset values while my watt meter was connected to the CPU plug:
Code:
Watt Usage while Idling

Offset    Vcore    Watt
------    -----    ----
+0.150    1.176     105
+0.130    1.152     105
+0.100    1.128     105
+0.050    1.072     104
+0.005    1.032     103
-0.050    0.976     103
-0.075    0.952     103
-0.100    0.928     102

So with a difference for a truely massive 0.250v in the offset is a very tiny 3 watt. It's certainly nice to have, but hardly worth optimizing for, let alone basing your overclock around it.
The really important settings are SpeedStep and to a lesser extend the C1E state. Disabling any other power saving feature only increased the consumption by another ~4 watt.
Edited by spoonium - 4/28/13 at 3:44am
post #6067 of 9531
Little update:


Tested with LLC level 4 now,

4.4 Ghz, same +0.004 Offset Turbo and 0.005 Offset Vcore running just as stable as before in Prime, gonna test Crysis 3 later. Voltage is jumping between 1.248, 1.256 and 1.264
post #6068 of 9531
Can someone please look over my settings? I am running Sandy bridge btw. I lowered my voltage to -0.005 and Load Line to 4. Voltage stayed the same. questionmark.gif

CPU-Z idle is 0.976-1.064. Idle temps are 25C-35

Ran prime 95 on blended for close to 45 minutes. Ran half the time blended and changed to the settings on Page 1. I know it needs to be hammered longer, but Page 1 said 5 minutes, then 15 minutes. Before running it longer, I wanted feedback first.

Thanks.





Edited by MoInSTL - 4/28/13 at 10:58am
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post #6069 of 9531
Quote:
Originally Posted by MoInSTL View Post

Can someone please look over my settings? I am running Sandy bridge btw. I lowered my voltage to -0.005 and Load Line to 4. Voltage stayed the same. questionmark.gif

CPU-Z idle is 0.976-1.064. Idle temps are 25C-35

Ran prime 95 on blended for half the time and changed to the settings on Page 1. I know it needs to be hammered longer, but Page 1 said 5 minutes, then 15 minutes. Before running it longer, I wanted feedback first.





You can set your Primary and secondary current limit at 250 also. Either select XMP profile or set your ram manually to the correct speed, timings, and voltage( cant see if your ram voltage is on auto or set). Besides that it looks good. How are your C-states? Did you disable C3 & C6?

Setup custom blend like the guide states on the first page and let it run. If it fails you will want to start adding additional turbo voltage to increase you full load vcore. Just post up here if you get a BSOD's or if a worker stops
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post #6070 of 9531
Thanks for the quick response. I am currently using the XMP profile. It's rated @ 1.5, so it's fine. Will check those other settings and edit this post.

C States were already disabled.

All I changed was the Duration.

FWIW, I have a Fractal R4 with the onboard fan controller. I am running 3 fans @ 5v plus 1250 RPM Macho cooler fan with the door closed.

My question though was I thought that my voltage would be lowered since I lowered it to -0.005 and changed Load Line to 4.

Just started Prime95 with the custom settings. Should be fine since I only changed the other two duration levels.




Edited by MoInSTL - 4/28/13 at 11:52am
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