CPU cooler running hotter after reinstallation

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grandmst20

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Feb 24, 2017
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AMD FX-9590 @ 4.7GHz (Stock)
Corsair H100i v2
32.0GB Dual-Channel Corsair CMY16GX3M2A1600C9 DDR3 @ 669MHz (9-9-9-24)
Gigabyte 990FXA-UD3 R5
EVGA NVIDIA GeForce GTX 1070 FTW Edition
Mushkin MKNSSDEC512GB (OS)
Western Digital WDC WD20EURX-57T0FY0
Seagate Barracuda ST2000DM006-2DM164
Corsair RM850 PSU
Windows 10 Pro 64-bit

Recently swapped out my motherboards as part of another issue. Went from an Asus M5A97 LE R2.0 to a Gigabyte 990FXA-UD3 R5. Of course, I had to clean and reapply thermal paste to reseat the cooler to the CPU on the new motherboard. The CPU cooler is a Corsair H100i v2.

With the old (Asus) motherboard my CPU idle temps were 15-30 degrees Celsius, and 30-50 under load.

Now, with the new board (Gigabyte) the idle temps are around 40, and under load is around 60.

This is for the CPU package. The radiator temps are almost exactly the same as what they were with the previous install (with factory thermal paste pre-applied), sitting at 30 degrees idle, then 35-40 under load.

First response is it's not seated correctly or too much/too little thermal paste, which may very well be true. I tried 2 different thermal pastes, Arctic Silver 5 and some unlabeled brand. This was merely to compare, both are giving me the same temps.

I have cleaned and reapplied the thermal paste 4 times, each time with less because it seemed to be too much previously.

First try: a line with a card smear
Second try: a pea size dot, spread via cooler compression to the board
Third try: half a pea size dot, spread via cooler compression to the board
Fourth try: half of the previous, almost a tiny glob, spread via cooler compression to the board

All 4 attempts listed above gave the exact same temp ranges. I just don't get it.
 
Solution
Supahos
Those damn things run insanely hot under any circumstances. 60 is to be expected as long as it's running full speed at 60 then I think everything is fine. Those chips should come with a nuclear symbol on them. The weird part is water-cooling actually makes the situation worse in a lot of cases. The lack of extra air on the vrms can wear them out. Make sure you have a case fan blowing across the heatsink near the cpu
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Supahos

Supahos

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Nov 11, 2013
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Well it's very possible that your old board was downclocking that CPU because it doesn't support it and now you're getting the full brunt of the CPU. Also possible you damaged the cpu running it in an unsupported board. Could've used too much paste, could have used too little. Could be the pointless nuclear reactor you dropped in your board is pointless.
 
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grandmst20

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Feb 24, 2017
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As far as the downclocking goes, that's very probable and something I suspect, but wouldn't I notice something like that through the numbers? It still ran at 4.7GHz, with +-1.5V, although I can't recall the actual wattage at idle/under load on the old board.


 
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grandmst20

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Feb 24, 2017
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That I can't answer for sure, because up until today I hadn't had this processor at full load (go figure). Even with my most demanding games maxed out, the processor doesn't come near the limit. Which is good, because it's precisely why I upgraded it, my FX-4350 was maxing out on some of the games.

It wasn't until today (because of this issue) that I learned of RealBench to actually max it out and see how hot it would get.

I was just wanting to clarify the issue and make sure it's not something I particularly did wrong. I'm kinda in agreeance with you that it may now be running at the full force whereas before it was throttled.
 
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Supahos

Supahos

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Nov 11, 2013
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Those damn things run insanely hot under any circumstances. 60 is to be expected as long as it's running full speed at 60 then I think everything is fine. Those chips should come with a nuclear symbol on them. The weird part is water-cooling actually makes the situation worse in a lot of cases. The lack of extra air on the vrms can wear them out. Make sure you have a case fan blowing across the heatsink near the cpu
 
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