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**Ivy Bridge Overclocking Guide** (with LN2 Guide at The End) - Page 49

post #481 of 1508
Quote:
Originally Posted by bgineng View Post

You probably still have voltage set to Offset: Auto. So your system is most likely pumping WAY more voltage into your cpu than it needs to for 4.2GHz.
I dont know which is the offset option cryingsmiley.gif
Is there a specific name for it?
post #482 of 1508
Thread Starter 
first you want to manually set the vcore. then you can worry about offset.

Go into the MIT menu, the voltage section, then to CPU voltage options, and you will see vcore, it should be the first. See what is greyed out and is stated as the current voltage.
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post #483 of 1508
I tested with Prime95 and my temp barely hit max 70C, but with IBT went 80C max. Which one should I trust?
post #484 of 1508
IBT or LinX are always 5-10 degrees higher than Prime95. So that looks correct.
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post #485 of 1508
Quote:
Originally Posted by malikq86 View Post

Seeing as you have built 13 IB systems....whats the average OC and max temp you seeing?

Using realtemp, the highest reported temp I've seen during p95 testing is between 98- 100c. I've never seen anything report higher temp than those. Even on a dedicated watercooling loop, quad rad on CPU alone anything above 95c would result in BSOD given enough time under max stress.

My personal build atm has a 360 rad cooling 3570k alone. I got my chip OCed at 5.0ghz @ 1.38v and temps peak at 85c, but generally hover around 78-82c in P95. In gaming the temps peak at ~72c but hovers ~65c. Idle is ~36c.

Intel decided to use thermal paste instead of the usual fluxless solder between the CPU die and heat spreader, which is causing some issues with the chip, especially on air coolers.

The difference between using an H100 and a real water cooling loop were massive on the 3570k. On SB 2500k and 2550k builds I've done, most of them do 5.0ghz no problem even on air coolers.

My recommendation to anyone looking to get a 3570k / 3770k and overclock it well, is to spend a couple extra bucks and get a water cooling loop. Something simple like a 240 rad kit from XSPC sell for ~$130 and go a long way with these chips.
Edited by Gallus - 6/24/12 at 9:50pm
post #486 of 1508
Quote:
Originally Posted by Sin0822 View Post

first you want to manually set the vcore. then you can worry about offset.
Go into the MIT menu, the voltage section, then to CPU voltage options, and you will see vcore, it should be the first. See what is greyed out and is stated as the current voltage.
I found the DVID below vcore, however it is greyed out. How can I turn it on?
post #487 of 1508
Just installed Scythe Gentle Typhoons on my H100.

Peaks at 80 now sitting at 4.8GHz. @ 1.33v.

biggrin.gif
post #488 of 1508
Quote:
Originally Posted by Gallus View Post

Using realtemp, the highest reported temp I've seen during p95 testing is between 98- 100c. I've never seen anything report higher temp than those. Even on a dedicated watercooling loop, quad rad on CPU alone anything above 95c would result in BSOD given enough time under max stress.
My personal build atm has a 360 rad cooling 3570k alone. I got my chip OCed at 5.0ghz @ 1.38v and temps peak at 85c, but generally hover around 78-82c in P95. In gaming the temps peak at ~72c but hovers ~65c. Idle is ~36c.
Intel decided to use thermal paste instead of the usual fluxless solder between the CPU die and heat spreader, which is causing some issues with the chip, especially on air coolers.
The difference between using an H100 and a real water cooling loop were massive on the 3570k. On SB 2500k and 2550k builds I've done, most of them do 5.0ghz no problem even on air coolers.
My recommendation to anyone looking to get a 3570k / 3770k and overclock it well, is to spend a couple extra bucks and get a water cooling loop. Something simple like a 240 rad kit from XSPC sell for ~$130 and go a long way with these chips.
You are talking nonsens here, if the problem is with thermal paste between chip and IHS, why then would "real" watercoling help? The problem is the chip-IHS heat transfer, not IHS-cooler/block base heat transfer.
The only way you can significantly lower the temps, is to change thermal paste between chip and IHS.
Also what temps you are going to get depends on chip itself, watercooling can help, but difference between air and water is way smaller than on previous generations.
Edited by sena - 6/25/12 at 9:13am
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post #489 of 1508
The theory is that the thermal paste inside the chip doesn't transfer the heat as quickly/efficiently as solder does. Causing heat to spike faster than on chips. Due to the nature of water, it helps combat the spikes by dealing with the heat quicker than air coolers do.

Here is a clip of the Tom's article talking about it

Toms- "We've now illustrated that Ivy Bridge dissipates its heat in a much smaller die than Sandy Bridge, and then uses a less effective mechanism for transferring it away from the die and out to a heat spreader. Once the overclocked processor's four cores are saturated, the temperature increase happens so fast that the CPU's thermal monitor triggers throttling faster than we could take and save a screen shot of Core Temp. The jump was phenomenal, taking less than a second from idle to throttling temperature. In the end, we had to use a script to take the shot.

Getting Rid Of Excess Heat

Our experience highlights one of the obstacles that prevents higher clock rates on Ivy Bridge-based CPUs: the cooling subsystem must be able to operate effectively and without any delay. On air, the throttling mechanism triggers before a cooling fan can spin up. We didn't have the luxury of risking the destruction of our test chips by prying their heat spreaders off, and we don't recommend that drastic step to anyone, really. So, we're recommending a closed-loop liquid cooling setup, at least. More extreme enthusiasts can pick a more serious cooling technology, of course."

Full Article.
http://www.tomshardware.com/reviews/ivy-bridge-overclocking-core-i7-3770k,3198-4.html

Also from personal experience in the past, a good after-market air cooler was always just as good / slightly better than the H100/H60 closed loop coolers. However, the difference on ivy bridge between aftermarket coolers vs H100 was pretty drastic. Going to real water cooling was even more drastic.

The ivy bridge series CPUs, imo, has benefited from water cooling more than any other chip I've ever seen. (And I've been building / modding PCs since the original Intel Pentium / AMD K5 days.)
Edited by Gallus - 6/25/12 at 9:44am
post #490 of 1508
Ok, then explain how with high end watercooling kits, temps is still spiking at 80C?
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