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Another 4790k Overheating - Page 4

post #31 of 42
1.26 is crazy high for stock settings.. and with stock settings it only clocks 2 cores to 4.4 with turbo right? Mine is just under 1.3 for 4.8 4/8. I was going to recommend disabling htt but if its working with turbo disabled, you're probably better off. I would still rma it if you can.
 
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post #32 of 42
Had this issue myself with an i 7 4790k. I was on custom watercooling . turned out to be a bent ihs
post #33 of 42
I had it replaced with another one and now everything is fine biggrin.gif
post #34 of 42
I hope I'm not bumping a thread that's done, but...it's recent enough and others have similar issues.

There are 4790K (and others going back to Sandy/Ivy) that simply get too hot. The primary culprit is the IHS (the can on top of the die). It is glued on with only thermal compound underneath. The older generation, and many of the higher end chips, are soldered to the die.

The glue may tend to expand as it cures, and perhaps Intel releases the clamps too early. Whatever the cause, it has been verified that the IHS occasionally shifts upward, away from the die, decoupling thermal contact. Those chips overheat no matter what we do.

However, many are just marginal. Good cooling will get fair performance. It's also been observed by a very few that over time the IHS may settled back down, under pressure from the HSF and due to heat. That is, some chips improve their thermal contact after a few weeks.

Many resort to removing the IHS. I'm preparing to do that to mine when materials arrive.

Yet, that's not all there is to it. 1.2 volts is too much for most 4790K's at 4.4 Ghz or lower. It appears that all boards assume a generalized profile, which can be updated with UEFI upgrades (sometimes to poor effect), and choose to feed more power than is required.

My stock, default settings, which ran turbo to 4.4Ghz and idle down to about 1Ghz produced 98C using OCCT on the stock Intel cooler, within about 90 seconds. A Coolermaster Hyper 612 v2 dropped that to about 87. I got that down to about 75c by setting everything to fixed mode operation. I'm at a fixed 4.4Ghz, 1.184v core, 1.7 on the main VRM, 4.2 Ghz on cache, 1.180v on cache, LLC around 50% (though it seemed to make little difference disabled).

I'm still learning this chip..well, Haswell and DC in general. It's touchy to get the right settings. I think it's more complicated trying to get adaptive modes tuned well, but I believe that's because the labels in UEFI on all the boards are difficult to understand.

Although my idle temps and power are higher than would be the case with adaptive voltages and speeds, my full load temps and power are lower than anything I could find with adaptive settings, and I couldn't stabilize the machine with adaptive settings even targeting the stock plan of 4.0Ghz with 4.4Ghz turbo. It would survive the tests, but in real world use I would have lockups/BSOD's. Once I switched to fixed mode and mapped out the chip's profile (voltage vs speed / thermal behavior) - the system has run for days without incident or reboot (72 hours since reboot, with multiple VM's, video transcoding, audio compression, RAR compression, 3DS Max editing / rendering, video editing, compiling in Visual Studio 2012...a bunch of stuff).
post #35 of 42
Quote:
LLC around 50% (though it seemed to make little difference disabled).

It's for the input voltage, not vcore
Quote:
98C using OCCT

Which test?
Quote:
I think it's more complicated trying to get adaptive modes tuned well, but I believe that's because the labels in UEFI on all the boards are difficult to understand.

good thing adaptive is pretty much useless

check the OCN thread out: http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics/
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post #36 of 42
Quote:
Originally Posted by GodKingThoth View Post

Test

Confirmed.

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post #37 of 42
Quote:
Originally Posted by Cyro999 View Post

It's for the input voltage, not vcore
Which test?
good thing adaptive is pretty much useless


Yep, adaptive is pretty much useless, even when targeting stock performance on a desktop machine. I can see the point on portables, but saving 10 watts just doesn't seem like a worthy cause.

The OCCT test that hit 98c was linpack without AVX. That was early in my setup (day 1/2). The same test is hitting about 75c now.

True, LLC is for Vrin, but with or without LLC I don't see Vrin move more than 1 or 2 thousandths of a volt off the setting on the ASRock Extreme6. I think it may be that it has 12 phase power, so until I move toward 4.6 and beyond, full load may not tax the VRM enough for LLC to be recognizably contributing.
post #38 of 42
Quote:
Originally Posted by JVene View Post

Yep, adaptive is pretty much useless, even when targeting stock performance on a desktop machine. I can see the point on portables, but saving 10 watts just doesn't seem like a worthy cause.

The OCCT test that hit 98c was linpack without AVX. That was early in my setup (day 1/2). The same test is hitting about 75c now.

True, LLC is for Vrin, but with or without LLC I don't see Vrin move more than 1 or 2 thousandths of a volt off the setting on the ASRock Extreme6. I think it may be that it has 12 phase power, so until I move toward 4.6 and beyond, full load may not tax the VRM enough for LLC to be recognizably contributing.

Software voltage monitoring isn't the greatest, you'd have to use a multimeter to really know
Quote:
I can see the point on portables, but saving 10 watts just doesn't seem like a worthy cause.

But Manual these days is just half adaptive with a cap on the voltage (if you set 1.3 for example, short of going to 1.32 under high load because of integrated voltage regulator behavior, it wouldn't go higher) - it has the same idle and low load functions as full adaptive does. The 10w saving doesn't exist, AFAIK.

Have you tried x264 test? (from the haswell overclocking guide with statistics thread)
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post #39 of 42
Quote:
Originally Posted by Cyro999 View Post

Software voltage monitoring isn't the greatest, you'd have to use a multimeter to really know
But Manual these days is just half adaptive with a cap on the voltage (if you set 1.3 for example, short of going to 1.32 under high load because of integrated voltage regulator behavior, it wouldn't go higher) - it has the same idle and low load functions as full adaptive does. The 10w saving doesn't exist, AFAIK.

Have you tried x264 test? (from the haswell overclocking guide with statistics thread)

Quite true, it's often a hunt just to figure out what sensors are attached to what labels - they don't even get the sensor's right. I use a multimeter to find what's what and to see if there's any correlation to reality. Of course, we can't test inside the CPU effectively, but at least I found Vrin.

I haven't downloaded the x264 test, but I have run x264 video compression on rendered animations and video. I scheduled a set of about 10 hours of video which took the machine 2 hours and change to complete. That was using Adobe Media Encoder CS6, set for x264, no GPU assist (mine don't really qualify for GPU anyway, IGP is disabled). Temps during that time, where I was also running two VM's (one Linux, one Win7) in a debugging session with Firefox/Chrome/IE, hovered in the low 70's, dipping to 68 occasionally, while running fixed at 4.4Ghz @ 1.184 vcore, 1.7 vrin, 1.81 uncore.
post #40 of 42
I just installed my 4790k and had same issues. I used an h60 at first, idle was 45-50 load around 85-90 while gaming, reapplied several times, went to an air cooler, then the stock cooler and temps just got worse (obviously) but I had to make sure it was the cpu and not the h60. My replacement is being overnighted to me from amazon. good customer service from them
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