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i5 8600k temperatures...

SB118

SB118

SB118

Soldato
Joined
18 Oct 2002
Posts
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"Sunny" Plymouth
Gave up waiting for a retail chip and tried my tray unit, i5 8600k, Asrock Extreme4, Team prodark 3866 ram, evo212 cooler.

At stock i'm hitting 82c under load with burn in test, it seems a little high. It will boot and run happily at 5ghz with 1.375v but the moment i put any load to it, it hits 100c in a couple of seconds and throttles back.

The cooler isn't even warm, my ir thermometer says the base is around 45c. I've removed and refitted the cooler three times with different paste every time and the temps don't improve.

I've fitted another fan to the 212 to give it a push/pull flow and the temps don't change.

Do i have a contact problem or just a spectacularly bad chip in need of deliding?
 
i havent overclocked mine yet but it never goes over 50 even in prime95 (on a h100i v2, with fans at less than 1000rpm)

either your cooler isnt making good contact or its a dud cpu?
 
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The base of the 212evo is a damn awful scratchy mess where they flattened the heat pipes but i've tried three different pastes and the temp behavior is the same on all of them.
 
you sure its clamping down properly on the motherboard / cpu? maybe try another cooler or wait for your other CPU and see if its that I guess

you took the plastic cpu socket cover out first i take it :p
 
gettothechopper said:
you sure its clamping down properly on the motherboard / cpu? maybe try another cooler or wait for your other CPU and see if its that I guess

you took the plastic cpu socket cover out first i take it :p
Click to expand...

Pretty sure it's clamped, I'm getting a nice paste spread when I pull the cooler off. I've got a stock intel cooler but that's a job for this evening, pulling the board isn't on my list of "fun things that fit into half term" (okay, it's on mine but it's not on hers...)

Plastic cover? Erm, brb ;)
 
SB118 said:
Gave up waiting for a retail chip and tried my tray unit, i5 8600k, Asrock Extreme4, Team prodark 3866 ram, evo212 cooler.

At stock i'm hitting 82c under load with burn in test, it seems a little high. It will boot and run happily at 5ghz with 1.375v but the moment i put any load to it, it hits 100c in a couple of seconds and throttles back.

The cooler isn't even warm, my ir thermometer says the base is around 45c. I've removed and refitted the cooler three times with different paste every time and the temps don't improve.

I've fitted another fan to the 212 to give it a push/pull flow and the temps don't change.

Do i have a contact problem or just a spectacularly bad chip in need of deliding?
Click to expand...


I am not surprised. When delided my 8600K, saw that barely had any TIM applied to it. The silicon in direct naked contact to the IHS by around 40% of the surface area.

(pictures can be found on the last couple of pages in the big Coffeelake discussion).
 
Panos said:
I am not surprised. When delided my 8600K, saw that barely had any TIM applied to it. The silicon in direct naked contact to the IHS by around 40% of the surface area.

(pictures can be found on the last couple of pages in the big Coffeelake discussion).
Click to expand...

Oh fun. Is liquid metal "essential" for deliding or is it just the best thing out there?
 
SB118 said:
Oh fun. Is liquid metal "essential" for deliding or is it just the best thing out there?
Click to expand...

it makes sense tbh for the silicon to ihs connection. And would last longer compared to normal paste. It's appliance isn't difficult. get the thermal grizzly product and use the masking tape method to apply it. Plenty of videos about it.

my delded 8600K goes all way to 50C while benching at 5.2ghz and the predator 360 at around 50% speed.
 
SB118 said:
Gave up waiting for a retail chip and tried my tray unit, i5 8600k, Asrock Extreme4, Team prodark 3866 ram, evo212 cooler.

At stock i'm hitting 82c under load with burn in test, it seems a little high. It will boot and run happily at 5ghz with 1.375v but the moment i put any load to it, it hits 100c in a couple of seconds and throttles back.

The cooler isn't even warm, my ir thermometer says the base is around 45c. I've removed and refitted the cooler three times with different paste every time and the temps don't improve.

I've fitted another fan to the 212 to give it a push/pull flow and the temps don't change.

Do i have a contact problem or just a spectacularly bad chip in need of deliding?
Click to expand...

For a point of reference, i just ran the burn in test with my 8600k at 5ghz and set the voltage to 1.375v. max temps got up to 81c on 1 core while the others cores where around 75c. this is with a 280mm AIO. not delided . surely it must be your cooler thats the problem and not the cpu . how did it go with the stock intel cooler ?
 
OldBoy75 said:
For a point of reference, i just ran the burn in test with my 8600k at 5ghz and set the voltage to 1.375v. max temps got up to 81c on 1 core while the others cores where around 75c. this is with a 280mm AIO. not delided . surely it must be your cooler thats the problem and not the cpu . how did it go with the stock intel cooler ?
Click to expand...

It kept a R5 1600 in the mid 50c range under load, don't have an intel stock cooler as it's a tray chip.
 
southernorth said:
If you wanted a fairly cheap, but well performing CPU cooler, the Dark Rock Pro 3 is currently on sale for under £50 in a few places. It performs similar to most 240mm AIO's
Click to expand...

That's the problem, i don't want to spend £50ish to find it's the chip itself that's the problem. I can put my finger on the ally block at the base of the evo212 and feel virtually no heat at stock idle, after 20 minutes of load it's warm but not much more, which i guess means the heatpipes are working. But the moment i try to clock it there isn't enough transfer and it throttles.
 
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Just to update this, i've delided and applied liquid metal then reassembled and the temperatures were no different! Still bouncing off 100c and throttling under any load when clocked.

So i put my water block on it, complete with knackered pump that rattles enough to drown out my video card, aaaaaaand, it hits 90c under load @5ghz, wtf? (that's with 0 AVX offset though ;) )

Took the block off and put on a different paste and the temps were the same. argh!

Sudden brainwave, after deliding, is my socket interfering with the contact surface?, there wasn't that much height difference between the IHS and the arms of the retention socket after i removed the adhesive on the chip.

So i use a straight edge (new stanley blade actually) to check the "deck" and find that there is a couple of rizzla clearance between the IHS and the socket arms (when i rocked the flat edge of the blade, it only just came off the far side of the ship before it hit the arms of the socket), so although it's tight, the socket isn't the problem.

BUT, and here's the breakthough, putting the straight edge across the IHS showed the chip was rocking a massive concave surface, i'm talking a good 0.5mm low spot in the middle of the contact surface. Thermal paste is there to fill up the air gaps, not be used as a filler so this thing is going to need lapping (very, very gently!) to get rid/reduce the defect.

Yeah, lots of words for little payoff, but the process might help somebody else who is having a similar problem and can't find the problem.
 
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