Question X62 + 9700K temp issues

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lapinobel

Prominent
Nov 10, 2019
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System :
i7 9700K (stock)
MSI Z390 ACE
2x8gb Corsair RGB ram PC3200 with XMP enabled
Fractal Define R6
radiator in front of case, 2x140mm Noctua as intake (in front of rad)
1 140mm intake at bottom (same speed as radiator fans)
1 140mm outtake at read (600rpm)

Ambient temp : +- 24°C
Liquid temp after boot : +- 35°C

After booting the pc, idle temps seem to hover around 41°C - 43° (but with regular spikes to +50°C - 60°C sometimes, depening on activity)
When running Intelburn, temp shoots up almost immediately to around 95°C (drops down to +- 75°c then rises again until finished)
When running Furmark CPU burn : almost immediately jumps to +- 95°C

No bubbles to be heard from the pump, pump runs at around 2.400rpm with performance mode on. Already tried reseating the cpu pump, applying new thermal paste (AS5), tried moving the radiator a bit more low or higher (I need to have it front mounted, with the tubes on top). The cpu pump is well below the tubes of the radiator, so should be good (I know it's better to have the tubes at bottom, but not possible in my case/gpu combo).

BF:V gaming : puts cpu around 80°C (performance mode)
Doom:Eternal : +- 62°C (not very cpu intensive)

Also tried running temp benchmarks with case open/closed, no difference. Liquid temps usually stay around 40°C max (or a little bit over under heavy stress). So a bit at a loss here, idle temps seem a bit too high, but especially stress tests seem very high, this is after all an X62 AIO, not some cheap air cooler. The X62 is about 3yrs old now, give or take a few months. It all 'seems' to run fine, but I have a feeling cooling performance isn't quite ok.

Or maybe my case just is very bad for airflow, but it got very good reviews so that's why I bought it together with the mainboard/cpu etc. Never noticed these high temps, but only recently started checking them. PC is pretty stable though, but no overclock. I though using an AIO like the X62 would indeed allow me to get a pretty good oc, but with these temps I don't even consider trying it.

Suggestions?
 
Did what you guys suggested, put the rad on top of my case just to rule out air pockets. Same results, idle temps are even in the lower 60's, jumping to 80 or more now. Guess it's really EOL. New X63 should be delivered today, will see then.

YpPZZqc.jpg
 
Just installed the new cooler. Idle temps 31°C - 33°C, liquid temps 28°C. Same orientation : radiator in front, fans behind radiator (so case>rad>fans). Pump running at 2800rpm. This is with the radiator fans at 30%. Unfortunately, it seems my Fractal fan hub is not reporting RPM to the bios (even though it's WPM). So cannot control fans from within Windows (this was possible with the previous X62, I knew this is not possible with the X63).

This is with open case, one outtake fan at the rear (Noctua NF14s), two intake fans behind the radiator (NZXT).