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7700k bad chip?

post #1 of 8
Thread Starter 
Hi, I recently upgraded from a 6600k to a 7700k(yes, bios is updated) and this is actually the 2nd 7700k I've tried. The first needed to be undervolted just to keep temps in check stock, so I exchanged it. This second chip runs a bit cooler, but still hot so I upgraded my cooling to a h115i. Thing is max temps are still high. Idle is fine between 25-30c but under load while in the 60-70s most of the time, temps will randomly spike into the 80s, or even 90s if I try to oc and run occt.

And speaking of overclocking, I can run realbench and xtu for hours stable at 4.9ghz and around 1.30v with realbench maxing at 88c. I tried for 5ghz but couldn't get it stable going up to 1.36v and temps where already in the 90s running realbench. So, I figured I'd settle for 4.8, which is also stable for hours running realbench and xtu at 1.28v and a max temp of 84c which I can live with. Problem is these setting fail instantly when trying to run occt. Occt fails after 5 minutes of 4.8ghz at 1.33v in bios with temps hitting the 90s, including cputin. The best stable oc I can get running occt is 4.7ghz at 1.28v. Anything more fails, even with huge voltage bumps.

Is cputin supposed to match the hottest core? Also shouldn't a h115i keep this chip cooler than this? And lastly I read that every 7700k should be able to hit 4.8ghz around 1.3 volts, yet I'm unstable at anything past 4.7. Is there something wrong with my chip that temps are so high and there's so little overclocking potential? I know you have to play the silicon lottery, but this is ridiculous. Thanks.

specs are
z170 gaming k6
7700k
h115i
r9 390
16g 2400 ddr4
evga 750w b2
Edited by MrObscura - 4/8/17 at 4:15pm
post #2 of 8
Temps are fairly high

Reseat & repaste your cooler. Make sure your case airflow is optimal.

If that doesn't do anything, Delid with the easy to use tools online (Rockit 88, Delid Mate 2) for a major decrease in temps.
 
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Black Beauty
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post #3 of 8
Thread Starter 
the cooler is definitely seated properly, idle temps are low and consistent and the chip displayed the same behavior with the previous cooler i had as well. i dont want to delid so thats not an option. as i said this is the second 7700k ive tried. the first was easy to replace since it was still within the 2 week return period at microcenter, but this one is not since i waited to upgrade the cooler figuring that would make a difference.
post #4 of 8
Quote:
Originally Posted by MrObscura View Post

Hi, I recently upgraded from a 6600k to a 7700k(yes, bios is updated) and this is actually the 2nd 7700k I've tried. The first needed to be undervolted just to keep temps in check stock, so I exchanged it. This second chip runs a bit cooler, but still hot so I upgraded my cooling to a h115i. Thing is max temps are still high. Idle is fine between 25-30c but under load while in the 60-70s most of the time, temps will randomly spike into the 80s, or even 90s if I try to oc and run occt.

And speaking of overclocking, I can run realbench and xtu for hours stable at 4.9ghz and around 1.30v with realbench maxing at 88c. I tried for 5ghz but couldn't get it stable going up to 1.36v and temps where already in the 90s running realbench. So, I figured I'd settle for 4.8, which is also stable for hours running realbench and xtu at 1.28v and a max temp of 84c which I can live with. Problem is these setting fail instantly when trying to run occt. Occt fails after 5 minutes of 4.8ghz at 1.33v in bios with temps hitting the 90s, including cputin. The best stable oc I can get running occt is 4.7ghz at 1.28v. Anything more fails, even with huge voltage bumps.

Is cputin supposed to match the hottest core? Also shouldn't a h115i keep this chip cooler than this? And lastly I read that every 7700k should be able to hit 4.8ghz around 1.3 volts, yet I'm unstable at anything past 4.7. Is there something wrong with my chip that temps are so high and there's so little overclocking potential? I know you have to play the silicon lottery, but this is ridiculous. Thanks.

specs are
z170 gaming k6
7700k
h115i
r9 390
16g 2400 ddr4
evga 750w b2

your temps are about the same as mine,i get 79.c core temp running Intel Burn Test Extreme at stock clocks
I will eventually delid,im going to order a Rocketcool deliding kit
Edited by trailer park boy - 4/10/17 at 5:23am
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strix Z270E
(18 items)
 
HAF 922
(14 items)
 
902
(11 items)
 
CPUMotherboardGraphicsRAM
I7 7700K strix Z270E asus gtx970 dcII 4gb 16gb gskill ripjaws 2400mhz 
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seagate sata 1 tb samsung 850 evo 500gb ssd lg blueray corsair H105 
OSMonitorMonitorMonitor
windows 10 home  asus 27inch 1080p  acer 24 inch 1080p acer 24 inch 1080p 
KeyboardPowerCaseMouse
logitech G110 evga supernova G2 750watt fractual design define XL R2 mx518 
Audio
sony wireless,,,headphones 
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fx 6300 asus m5a99X evo asus gtx 670 2gb  8gb 1600mhz gskill ripjaws 
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corsair 120gb ssd WD 1 tb 7200rpm lg blueray H100 
OSMonitorKeyboardPower
windows 7 home premium 50 inch 3d plasma 1080p,,smart tv logitech wireless  corsair tx 750 watt 
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coolermaster 922 denon 7.1,home theatre 
CPUMotherboardGraphicsRAM
amd 965x4 asus,m4n72-e asus gtx 570 1.25gb 8gb 800 gskill ddr2 
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samsung 840 evo lg cheap zalman something cpu cooler??,,,works pretty good lg 22 inch 
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post #5 of 8
I would delid with a razor or a delid kit or a vice. then apply cool laboratory liquid metal on the silicone and the ihs and make sure you scratch the surface of the ihs both sides. then use thermal grizzly on the cpu and make sure you scratch the surface of the copper block of the h110 cooler make sure you don't use more themal paste then you need. I delid my 7700k as soon as I got it and applied all that and load temps with realtemp at 5.0ghz never get above 60C they stay around 47-52c and spike to 55- 60c after about 15 mins. so yea the delid helps out a lot and scratching both surfaces with the brillo pad that comes with the cool laboratory liquid metal. you may be able to use the liquid metal on the h110 to the ihs but it make be hard iv never tried it that stuffs kinda hard to work with. but the thermal grizzly is a good paste I think its more liquidly then artic silver 5 which was what I used for 10 years until I switched to the grizzly. but yea delid that chip and your temps should trop 25-30c
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post #6 of 8
Thread Starter 
just an update... fortunately the place i got it from is cool and they are going to let me exchange it for a third chip. after 3 chips if things are still the same, then ill just live with it.
post #7 of 8
My cpu was about the same temps at similar speeds and voltages on a custom loop with 2x200 rads just on the cpu. I delidded shortly after hitting a 4.9ghz thermal wall. After delidding, my temps at 4.9ghz were similar to what they were before at stock speeds.

The process was not difficult with the proper tools. And in my experience, it was worth it with a 30c drop in temps at 4.9ghz. Now I can run 5.1ghz stable, and bench at 5.18ghz. My everyday speed is 4.8 with about 1.29v, so I don't have a golden cpu... but the stock heat spreader installation was very restrictive of my thermals. Now I see a max of about 74c load temps after a few hours of stress testing at 5ghz.

It doesn't matter how good your cooling is if the heat isn't being transferred to the cooler from the die.

I previously had no changes in my 3570k going from a 120 CLC to a 200 + 240 rad custom loop. The 3570k just couldn't transfer the heat
Edited by EMUracing - 4/13/17 at 6:12pm
post #8 of 8
Quote:
Originally Posted by MrObscura View Post

...
Problem is these setting fail instantly when trying to run occt. Occt fails after 5 minutes of 4.8ghz at 1.33v in bios with temps hitting the 90s, including cputin.
...

Completely remove and Reinstall OCCT with your machine at stock settings. If you run HWiNFO64 while running OCCT, you'll sometimes see OCCT report an erroneous core temp of 95C on one of your cores when HWiNFO reports maximum temp of 76C or so. Don't know why it happens, but I've seen it on 2 machines with great cooling. I haven't bothered trying to debug it. I just run RealBench loops instead.

See this for quick fix: Overclock.net previous thread: OCCT Bug
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