Question Weirdly high 7800x3D temperatures & performance

[WumpusTheCoder]

Hello there,

As the title says - my (relatively) brand new 7800x3D currently never reaches no less than 49-50c when "idle".

When under full 100% load with e.g. Prime95 or Cinebench - the temps easily reach upwards of 89c (and are never lower than 83c), which is then when my CPU starts to thermal throttle.
Gaming sees temps of the high 70s, also.

Here is some info and/or steps I have taken to try and rectify this problem:

1. I have reseated the AIO cooler's block many times, as well as even going as far as trying a completely different make and model of AIO. Still, the results listed above have been consistent throughout.
2. When installing my cooler, I remove pre-applied thermal paste, and apply my own bit of MX-4, applied consistently as a thin layer via a spatula to cover all parts of the IHS.
3. I have reset my CMOS and updated my BIOS to the newest version.
4. I have used the Windows MCT to make a fresh Windows 11 installer to then install Windows 11 fresh on the system after every couple of tries with my cooler etc. I would also then after OS & (chipset & graphics) driver installation then install my 4-5 most commonly used apps*.
5. After every re-seat of the pump block etc., I would clean both the IHS and the pump block with 70% Pure Rubbing IPA, which I would then (after cleaning) let dry fully for 10 minutes in a low-minimum dust environment.
6. The wattage used when under full load also does not seem right. I am using only around 65-ish watts or so when running a Cinebench R23 Multi-Core test(*2).

If anybody could please provide any advice whatsoever on how to diagnose all of this further/rectify the issues - I'd be very grateful.

Thanks a lot.

---

*: In my circumstance, I'm defining IDLE/my most commonly used apps as only having Discord open (in the background, not in a call etc.), Fan Control open (in the background), and HWiNFO open (again, in the background).

*2: My average Cinebench Multi-Core score is around 17200 or below. Never higher, unless it's an anomalous result - and even then it would only be higher by ~100pts.

Full build specs:
https://uk.pcpartpicker.com/user/SyndicateBear/saved/#view=XLWdqs

Most recent CPU-Z "Validation": https://valid.x86.fr/4c2xbe

 

[Lutfij]

Sig space specs can and will change over time, which can and will render this thread moot to the person in the same boat as you're in now. This is why I shoehorned your build's PCPartPicker link into your thread.

That being said, can you elaborate on how the AIO is oriented in your case? A picture would help us two fold. Number of fans in your build + orientation of fans in said build? Out of curiosity, did you swap the fans in your list with that on the AIO? Since the AIO's fans have a higher static pressure rating which is necessary for pushing air through heatsinks and/or radiator fins.

 

[WumpusTheCoder]

Sig space specs can and will change over time, which can and will render this thread moot to the person in the same boat as you're in now. This is why I shoehorned your build's PCPartPicker link into your thread.

That being said, can you elaborate on how the AIO is oriented in your case? A picture would help us two fold. Number of fans in your build + orientation of fans in said build? Out of curiosity, did you swap the fans in your list with that on the AIO? Since the AIO's fans have a higher static pressure rating which is necessary for pushing air through heatsinks and/or radiator fins.

The AIO (LS720SE) is fitted with the default fans in the default exhaust config.

The AIO is oriented with the tubes facing down, and then the radiator is at the top of the H9 Flow with the tubes coming from the right (standard configuration).

So, the overall fan config is as follows: 3x side fans as intake, 3x bottom case fans as intake, 1x outtake fan at back of case, 3x fans (came with AIO) on AIO rad in outtake config. Everything is stock.

 

[Phaaze88]

When under full 100% load with e.g. Prime95 or Cinebench - the temps easily reach upwards of 89c...

That's functioning within expectations. All Ryzen 7000s shoot up like that, specifically under all core load.
The cooler affects the max turbo average over a period of time; stronger cooling yields higher averages. Not going to be easy to see this difference in average without other coolers on hand to try out. The following shows what I'm referring to though:

View: https://www.youtube.com/watch?v=OGuFq3jm9hM

 

[CelicaGT]

As Phaase88 noted, all very normal. Run the bag off it and enjoy.