I7 6700K gets very hot on new build

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Paul_147

Commendable
Jun 6, 2016
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1,510
Hello people,

I just finished my first build, which was more difficult than anticipated (I guess I never learn).

However I did manage to make it work and install windows 10, only when I was stress-testing the system the CPU gets way too hot.

When I used Asus RealBench 2 cores even almost hit 100C just after a couple of minutes. so I stopped it before it even ran for 5 min.

On some other benchmark programs it quickly went well over 80C as well.

Now I haven't installed any games or video editing software yet just Win10, chrome and a bunch of testing programs.

Even when the system isn't doing much the temps spike up to 60C+ every now and again (using RealTemp).
also the cursor lags sometimes, which is weird if I'm not running any programs.

Now the system is slightly overclocked by the Asus Bios "EZ Tuning Wizard" and the X.M.P enabled.

Which was the only way to get the system to boot properly!

This might have something to do with the Crucial Balistix Sport DDR4 2400 (I guess this frequency might be the problem)

the list of my system's components (even the probably irrelevant ones):

- I7 6700K (bought second hand)

- Asus Z170i pro gaming mini-ITX (bought second hand) (updated the bios) https://www.asus.com/Motherboards/Z170I-PRO-GAMING/

- Crucial Balistix Sport DDR4 2400 16gb kit (2x8gb) http://www.tweaktown.com/reviews/7147/crucial-ballistix-sport-ddr4-2400-16gb-quad-channel-memory-kit-review/index.html

- Corsair SF450 450W

- Samsung SM951 NVME M.2 ssd (boot drive) http://www.anandtech.com/show/9396/samsung-sm951-nvme-256gb-pcie-ssd-review

- Scynthe Shuriken Revision B CPU cooler (which probably isn't great but I guess better than stock, plus my ITX case won't fit much larger. http://www.scythe-eu.com/en/products/cpu-cooler/shuriken-rev-b.html

- One 180mm fan on the top blowing straight down on the motherboard and the CPU cooler.

- The case is a Silverstone SG-08 Lite. http://www.silverstonetek.com/product.php?pid=484

- One samsung 750 evo ssd + one westerndigital blue HDD

If I need to clarify anything else please let me know.
I really can use some help because I'm not sure what more to try, also I'm living in Japan and taking it to a shop and explain what the problem is is going to be very difficult.

I think that maybe the voltage of the CPU is to high (my noob guess) but I tried other ways in the bios to not use any OC on the CPU (or just very little by hand) but then the system just won't work.

I'm afraid to use the system now, or at leas running anything like video editing software for example. but that was the main reason I build the thing.

I don't need the fastest system, just a stable one that is capable of running some video editing software, so I guess the CPU and RAM should be able to do this at stock speeds as well (if I could get this to work.)

your help really is much appreciated,

Many thanks from Japan!

Paul.

 
Solution
basroil


That cooler was never designed with Skylake in mind, especially the tiny height difference between it and 1155/1156 chips. Just get a new cooler:

http://shop.tsukumo.co.jp/goods/0843591025096/204010080000000/ <-- if you really plan on overclock or are worried about clearances
http://shop.tsukumo.co.jp/goods/4716123315629/204010050000000/ <-- if you want quality air that's compact enough for that case
http://shop.tsukumo.co.jp/goods/4719512035092/204010060000000/ <-- cheap air that's skylake certified...
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basroil

basroil

Glorious
Oct 19, 2013
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Sounds like you aren't getting enough pressure on the CPU mount or your CPU overclock is too high.

Try stock speed with a cooler designed for skylake (if you have tsukumo nearby you can usually get a "used" one for ~1000yen) and see if that helps
 
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Paul_147

Commendable
Jun 6, 2016
11
0
1,510


Wow that's quick, thanks for your reply!

Is there a way to get it to fit more tightly? since it's a click system I thought it just clicks in and that's it.

And I tried to get it to run at stock speeds, but somehow it won't work. when I was looking into the problem I found somewhere that maybe the RAM needs a slightly higher voltage to work. that's why I tried the OC Wizard, and it seemed to do the trick.

 
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Hyboria

Hyboria

Reputable
Aug 25, 2015
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Just to get the obvious questions out of the way:

1) Did you put thermal paste on the cooler?
2) Is the cooler firmly attached to the CPU?
3) Have you tried re-seating the CPU cooler? I'm skeptical of this "Versatile Toll-Free Multiplatform System"

Also, hot air rises. I wouldn't have the fan on the top of the case blowing hot air back down into your case. Do you have any other fans on the case?
 
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Paul_147

Commendable
Jun 6, 2016
11
0
1,510


Also many thanks to you for your very fast reply!

to answer your questions:

1) yes I did, I didn't use the little bag of sealant that came with the cooler but I got one of thos little injection needle type ones because I thought those would be easier to apply, however I did not get the nice "pea" shaped drop as I in the videos on youtube, i got more like a little grey dog turd.

2) as far as I could tell, yes. the black pins were visible in the middle of the white pins, and I even pressed a little harder on it to make sure. Although not too hard because I was afraid to snap the motherboard.

3) I guess I should get the whole thing out and do try to re apply the cooling paste and stuff.

you think the Synthe cooler might be the problem? It was only 30 dollar so I didn't expect much, but at least normal cooling. Plus it fitted in the small case.

I did read about the airflow and that it's better to go from down in the case to higher, it's just that this case (pretty as it may be) doesn't have much other places to fit fans but the top.
 
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Hyboria

Hyboria

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Aug 25, 2015
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If you can find any space to attach a case fan at the front or bottom of the case sucking air in, and flip the fan on the top of the case over you'd get much better air flow.

If the cooler is firmly seated on the CPU, isn't wobbly, and you've applied thermal paste correctly I'd probably have a look at the overclock settings.
 
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basroil

basroil

Glorious
Oct 19, 2013
8,698
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That cooler was never designed with Skylake in mind, especially the tiny height difference between it and 1155/1156 chips. Just get a new cooler:

http://shop.tsukumo.co.jp/goods/0843591025096/204010080000000/ <-- if you really plan on overclock or are worried about clearances
http://shop.tsukumo.co.jp/goods/4716123315629/204010050000000/ <-- if you want quality air that's compact enough for that case
http://shop.tsukumo.co.jp/goods/4719512035092/204010060000000/ <-- cheap air that's skylake certified (http://www.coolermaster.com/company/newsDetail-M1507210001dcf7-20150721.html?page=2)
 
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Solution
P

Paul_147

Commendable
Jun 6, 2016
11
0
1,510


Thanks for your suggestions as well!

Unfortunately the motherboard sits flat on the bottom and the front is completely closed (as is the back btw.) so haven't got that many options.

I did check for any wobbling but it seems to be stuck pretty well, it's mostly the motherboard flexing.
 
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Paul_147

Commendable
Jun 6, 2016
11
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1,510


Aha, I didn't know there was a hight difference. I guess that might be the problem then.
Thanks for the links btw! it's even a Japanese shop.

any chance I damaged the CPU btw? like I said, the temperatures almost reached 100C.
 
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basroil

basroil

Glorious
Oct 19, 2013
8,698
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From heat? Unlikely, the CPU automatically slows or shuts down when overheated to protect itself. From voltage? Possible if you overvolted the CPU like crazy or lifted the memory voltages above ~1.35V

And tsukumo is the bomb, lowest prices in Japan usually. If you live in Fukuoka, Nagoya, Tokyo, or Sapporo, the brick and mortar stores are fun to visit. Sometimes you can get things like a H100i for ~8000 yen (but only first 5 people, and it sells out in minutes)
 
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Paul_147

Commendable
Jun 6, 2016
11
0
1,510


Well that's a relief then,

btw, how do you make sure that a CPU cooler is specifically designed for Skylake? because the Scynte cooler box does say to be LGA 1151 compatible specifically.
 
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basroil

basroil

Glorious
Oct 19, 2013
8,698
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Most makers had some sort of press release stating which models worked. Scythe hasn't stated anything, though the fact that they claim compatibility with everything back to a pentium 4 usually doesn't work in their favor!
 
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Paul_147

Commendable
Jun 6, 2016
11
0
1,510


I see what you mean then. I can understand these tolerances are too small to work with "one-size-fits-all" parts.
 
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