Weird GU Tempratures

[CoolaxGaming]

Hey guys,

I have recently finished a new build and I am getting very weird gpu tempratures. Some context of the cooling stuff:

8x nf a12x25 on 2x 480mm radiators (front)

8x nf a12x25 on 2x ek thick 480mm radiators (top)

+ 2x nf a12x25 as rear exaust

dual d5 ek pump

 

This stuff cools 2 blocks, the maximus z690 glacial running a 12900ks and a 3080ti (regular waterblock and an active backplate from EK).

The thing is, the 3080ti tempratures are totally whack. The card runs so much hotter than it is supposed to be. I had a 11900k (I believe) with a 2080 super in my old build which just ran off 1x 480mm rad and 1x 120mm rad and I never saw temps cross 70?

Anyways, ambient is usuallly 23-26 degrees C and I never let it go over or under that. However the GPU temprature is very weird:

GPU Load: 86%

Memory Controlled load: 75%

Memory Temprature: 46C

HotSpot: 103C

GPU Temprature: 78C

This is over a 10-15 minute ldoad. The thing is, the thermal camera I have never shows anything go over 30-35 degrees, but I thinjk thats just reading the temp of the water, which is confirmed by the motherboard water temp sensor never going over ~37C

 

Now, so far I am thinking I should just drain this thing, undo the GPU block get new pads and go over the whole thing again and see if I missed a pad or didnt spread out the paste. Though I am confused why the hotspot is so much higher than everything else. Another thing is that the tempratures go up within a second or two under load and they drop all the way down a second or two after load. This is a bit unusual for me as I remember temps going down slowly in previous builds, never this fast. Anyone got any other ideas besides just redoing the water block?

[Bitter]

High hotspot only indicates poor contact, either a paste spread issue or a mounting pressure/mounting flatness issue. Hotspot generally will be within 10-20C of GPU temps depending on the cooling used, with water cooling it should be closer to the 10C delta range I'd expect.