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Old 04-14-2018, 03:45 PM
Lenster45 Lenster45 is offline
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Default 8700K Weird temps

I have a 8700K installed in a Asrock Z370 Taichi MB with G.Skill 3200 RAM using a Corsair H100i V2 cooler. Case is Phanteks Ethoo full size with front and rear fans
The pump is powered directly from a SATA power connector and the fans are attached to the pump.
Using Clink software, I have set the pump to performance and the fans to balanced.
Idle temps range anywhere from 35C to 44C and are different almost every time the computer comes out of sleep or is powered off then on.
The slightest bit of activity sends the temps spiking to mid 50s to low 60s. Cinebench hits 100C after about 10 seconds.
Ram and running at xmp 3200 changing it to 2133 makes no different to temps. MCE is disabled. I have tried manual cpu voltage as low as 1.16 and also tried offset -60mv. It does not seem to make any difference.
SIV and Hwinfo show Vcore max at 1.248.
H100 coolant is anywhere from 35-37 at idles and around 42C during cinebench.
I have pulled the pump many times to check the seating and the AS5 compound has evenly spread across the top of the cpu. There is no looseness in the pump / MB mount.
Coolant tubes feel about the same temp and never feel hot. The pump rpm is always around 3150. Fans go higher or lower per normal.
I am at my wits end and and wondering if my pump / flow might be bad.

This pump was used on a Z77 / 3700K with no problems prior to this new build and I used to be able to run Cinebench with a peak of high 80s to low 90s for the first month or so after after building this rig. Then the problems started.
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Old 04-14-2018, 05:34 PM
c-attack c-attack is online now
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Quote:
Originally Posted by Lenster45 View Post
H100 coolant is anywhere from 35-37 at idles and around 42C during cinebench.
Your coolant temp is the minimum possible CPU temp and this explains why you also see CPU core idle temps in the 37-45C range. However, that is pretty warm for a resting coolant value. It was 27-29C in my office when I got home last night and the H115i PRO coolant temp was still about that same value at idle. Can you explain the layout of your case? I assume the H100i is in the top, but is it intake or exhaust and the rest of the fans as well. Room and case ambient temperature are the largest determining factor in your idle coolant temp. How warm is the room? Are there other motherboard or drive temperatures that might suggest more about the case temperature? (post a screen shot of Link Home if you can)

Hitting 100C on Cinebench reads like a contact problem. That is a +60C delta over coolant. Yet your coolant delta for that at +5C is normal suggesting the heat is getting into the system. What this might mean is you need to tighten a few BIOS settings to prevent synthetic stress tests from slurping up too much voltage. Even if we knock 10C off the ambient/coolant temp, you would still be at 90C and that does not seem like an acceptable or expected number for ~1.25v.

When your pump is going, you usually get strange noises, wide fluctuations in RPM, etc. This is not the only potential problem. You also may see a flow restriction of some type that has similar end consequences. Sign this may be an issue are high idle coolant temps in an otherwise temperate room, large rises in coolant temp under CPU only load, followed by very slow declines that may take an hour or more. If you hit 100C in Cine in 10 seconds and also see a +5C rise in coolant temp in 10 seconds, then this is an issue. Coolant temp should be slow to go up. It takes mine almost 8 or 9 minutes to reach +5C at 100% load with moderate fan and pump speed.

Last edited by c-attack; 04-15-2018 at 10:42 AM.
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Old 04-14-2018, 10:45 PM
Lenster45 Lenster45 is offline
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Thanks for the reply.
Full size case config has 200MM fan in front sucking air in. H100i is mounted on top with fans blowing air out.
140 mm fan in rear blowing air out. 120mm fan on bottom sucking fan in.
gtx1070 idle is 40.
Last time I pulled the pump I placed a straight edge across the cpu and locking mechanism and I could not see any daylight using a flashlight. There are no fluctuations in pump speed or any gurgling noises.
I have attached a screenshot of clink home at idle after being asleep for about 4 hours and another after a Cinebench run.
Ambient temp in room is 77F.



Edit: I included two links to pics of Clink, but they don't show. I guess I'm not doing it right

Last edited by Lenster45; 04-14-2018 at 10:48 PM. Reason: No pics
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  #4  
Old 04-14-2018, 10:50 PM
Lenster45 Lenster45 is offline
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Here are the attachments
Attached Images
File Type: jpg clink idle.jpg (176.3 KB, 289 views)
File Type: jpg clink load.jpg (175.4 KB, 231 views)
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  #5  
Old 04-14-2018, 11:44 PM
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If the fan speeds reported by Link are accurate for your case fans, then you certainly don't have enough airflow through that case, especially with a 1070. Your case internal temperature is quite high ... this is likely what's causing your coolant temperature to get high. Most telling is that "Aux" motherboard temperature of 48C (unless that's the Chipset, which always seems to run around 50C, regardless).
What is the max value for the vCPU/vCore?

And how long does it take for your cooler temperatures to increase to 40C or higher?
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Old 04-15-2018, 03:39 AM
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Default re cooling

This is same issue i had before highest 99-100 degeree on load

Now its better

2 things first ensure the cooler is tightly fitted even a 0.2% gap will lead to enormous temps

try changing the thermal paste to different band if this is new cooler its fine leave it

3rd see if you can add another 2 fans in your case for the radiator ie push and pull either top or front change the fans according.

Do post the current oc'ing you have done.

a complete system spec including a side view of the pc built. We need to see the airflow and spacing for any further modification etc.

Do share the pics and details system spec for to proceed.
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Old 04-15-2018, 09:53 AM
Lenster45 Lenster45 is offline
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Thanks for the replies.
I have cranked all the fans up to max and it had no effect on idle or load temps.
The air coming out the back of the case feels cool.
Coolant temp takes less than a minute to rise 5-6 degrees.
I have attached a pic of the case interior. I have added another 120mm fan at the opening of the 5.25 drive bays blowing air over the cpu area to no effect.
Running with case covers off make no difference in temps (idle or load)
I also have attached a copy of SIV hardware status which show max vcore of 1.2v
There has been no overclocking. other than XMP for my ram, the only thing I have done is changed fixed voltage to 1.16 and then I tried offset voltage with -60mv offset.
neither setting has had any effect on temps.
I am beginning to suspect it is a seating problem, but for the life of me, I can't figure why.
I am thinking my next step may be to pull the MB and see if I can visually look at the way the pump sits on the CPU.
Attached Images
File Type: jpg IMG_20180415_093537.jpg (4.10 MB, 139 views)
File Type: jpg SIV.jpg (410.0 KB, 124 views)
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Old 04-15-2018, 10:06 AM
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Your fan speeds are low for the stock fans on the H100i V2.

What connector do you have this plugged in on? Are you running Link and SIV at the same time? (do not do that)

That said ... a rise of 5-6C in a few minutes is not normal or expected. This is usually indicative of some kind of blockage. Your case ambient temperature does seem a little on the high side as well but that shouldn't cause the coolant to rise that quickly.
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Old 04-15-2018, 10:09 AM
Lenster45 Lenster45 is offline
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Quote:
Originally Posted by DevBiker View Post
Your fan speeds are low for the stock fans on the H100i V2.

What connector do you have this plugged in on? Are you running Link and SIV at the same time? (do not do that)

That said ... a rise of 5-6C in a few minutes is not normal or expected. This is usually indicative of some kind of blockage. Your case ambient temperature does seem a little on the high side as well but that shouldn't cause the coolant to rise that quickly.
The H100 fans are attached to the pump. I have tried cranking them up to max and nothing changed. No I do nor run SIV and link at the same time.
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Old 04-15-2018, 10:49 AM
c-attack c-attack is online now
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Quote:
Originally Posted by Lenster45 View Post
Thanks for the replies.
I have cranked all the fans up to max and it had no effect on idle or load temps.
The air coming out the back of the case feels cool.
Coolant temp takes less than a minute to rise 5-6 degrees.
This pretty much nails it as a flow problem or partial blockage for me. The only other reason you might see this behavior is if the radiator cannot shed heat for some reason, like if were fitted with a dense dust filter or other restriction of that type. Rapid coolant temp rise is never good and the combination with high idle coolant temps is pretty damning.

The Cinebench stuff may need another look at a few BIOS settings, but no reason to get into that until a new cooler is in place. Use the support ticket system link at the top of the page to create a RMA request. If you have another viable cooler, put it on. If you can, ask for the express RMA with a credit card hold so you can get a replacement cooler in and then ship the old back. Another option is to pick something new of your choosing and then use the RMA replacement cooler as a back up or for use somewhere else.

Last edited by c-attack; 04-15-2018 at 01:17 PM.
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Old 04-15-2018, 12:58 PM
Lenster45 Lenster45 is offline
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Thanks for the analysis. I opened a ticket.
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Old 04-15-2018, 08:44 PM
Lenster45 Lenster45 is offline
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Just an update. I pulled the V2. The only thing I had to use was a stock intel HSF. It idles in the mid 40s but no spikes and Cinebench tops out at 94 as opposed to 100 with the V2,
but it sounds like my neighbor is sanding wood.
If Corsair does not want to replace it as I cannot find a receipt, I think I will upgrade to an H115i
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Old 04-15-2018, 09:16 PM
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Quote:
Originally Posted by Lenster45 View Post
Just an update. I pulled the V2. The only thing I had to use was a stock intel HSF. It idles in the mid 40s but no spikes and Cinebench tops out at 94 as opposed to 100 with the V2,
but it sounds like my neighbor is sanding wood.
If Corsair does not want to replace it as I cannot find a receipt, I think I will upgrade to an H115i
Yeah, it's unlikely that you'll get it replaced without the receipt. The H115i PRO is an excellent replacement.
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Old 04-15-2018, 11:19 PM
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I don't intend to thread hijack, I can make my own thread if wanted, but this is precisely the problem I'm having.

I have Ryzen 3, 1.35V, 3.85ghz, I was never happy with my H115i but it used to be a lot better. It used to max out at in low 70's C with these settings (my similar spec HTPC with H90 and worse airflow was still better). It has been going up slowly, now I tested today and it went to 88C before system crashed. Only doing 2 core Prime95 I'm sitting at 78C. Room temp is <20C (it's cold in upstate NY), idle mobo/vid card is 28C, idle CPU is 35C and coolant 33-34C. After 5-6 minutes coolant has risen to 41C. After 10 mins, 42C. Fans are at 2000 RPM, pump at 3000.

Seems you guys think this is a flow problem. What exactly could cause flow problem and where does it happen, at the pump or in the rad or tubes? One thing I've always noticed, at full load the rad only seems to get hot near where the hot fluid enters the rad and nowhere else, putting my hand above that spot the air is warm but everywhere else on the rad it's cold. Another question is where is the fluid temp sensor exactly? I think it must be near the hot tube.
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Old 04-16-2018, 12:18 AM
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can you try changing the thermal paste. How long have you been using the cooler for.

I have same issues with cooler master pro gel which is not suffice. As this coffee lake is really hot.

So better try noctua or any know top brand paste and re-apply. I have managed to get the temps under 90 most of the time when my ambient is below 30 but if its 35+ it still reaches 93 but never goes above 95 or even sees a spike of 100
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