My 5800x is reaching up to 90°C while gaming with custom water cooling. Even with undervolting (Curve Optimizer) the temperatures are 85+°C. I also reapplied a better thermal paste (Thermal Grizzly) and tightened the cooler but nothing changed. The GPU shows perfect temperatures so the flow rate should be also fine. This is my setup:
Asus ROG Strix X570‑I Gaming (latest BIOS)
Palit GeForce RTX 3080 GamingPro
AMD Ryzen 7 5800X
Crucial Ballistix 64GB DDR4 RAM 3600Mhz
1TB Corsair mp510 1tb NVMe Gen3
1TB WD_BLACK SN850 NVMe Gen4
EK-Quantum Vector RTX 3080/3090 D-RGB - Nickel + Plexi Waterblock + Backplate
Alphacool Eisblock XPX Aurora Edge - Plexi Chrome Digital RGB
Alphacool Eisstation 40 DC-LT
Alphacool DC-LT 2600 Ultra Low-Noise Pump
Alphacool NexXxoS ST30 Full Copper 240mm Radiator V.2
Do you think it makes sense to send in the processor and have it replaced? I know that the 5800x can handle up to 90°C but for a lot of users, the processor runs significantly cooler with worse cooling. Furthermore, the fans are too noisy (I'm using Noctua fans) while gaming because of the high temperatures. Thanks for your help!
Is the CPU block the highest point in the cooling loop?
If so it might be causing air to be stuck in the block limiting flow and cooling.
Don't have much experience in custom loops.
If the Temperature is reaching 90c then most likely the processor is throttling. 90c is the Maximum Operating Temperature for that processor. Once it starts to reach or surpasses 90c the processor automatically starts to throttle or lower its speed to keep the temperature at or below 90c.
You Processor has a TDP of 105 watts so your custom 240mm AIO should be able to keep it below 85 or even 80 under heavy stress or loads.
Since you have a custom built AIO most likely you have it connected incorrectly in which the fluid is not circulating properly if at all in the Radiator or the Radiator is not cooling the fluid properly or efficiently.
You should verify to see if the water-block is pumping fluid or not. Generally the input hose should be slightly cooler than the output hose on the water-block. Also you should notice some slight vibration on the hoses as fluid circulates.
I notice that you have two different water-block listed. Do both have the same issue as far as temperature on the CPU? Possibly that maybe the water-block is not powerful enough to circulate the fluid efficiently through the radiator. just guessing though if you are using one that didn't come with the Radiator.
I would also check your CPU temperature with Ryzen Master to verify it is the same as the monitoring software you are using. In case you are not using Ryzen Master.
As mentioned, an air bubble could cause a blockage to occur anywhere where fluid flows.
Basically, I doubt it is a defective processor but rather a incorrectly installed or defective Custom AIO system.
NOTE: Another User had a similar situation with his retail AIO system. The User replaced the AIO with an Air cooled CPU Cooler temporarily to troubleshoot and found out that the CPU wasn't running hot anymore. Turned out to be a defective AIO. He had a similar issue where the processor would start to overheat under heavy loads or stress.
The higher-end Zen3s hit 142W under normal usage. With PBO set to "motherboard" they can get much, much higher. Generally, you shouldn't get >75C or so with PBO disabled and good cooling/chassis ventilation, but with PBO unleashed only high-end cooling won't cap at 90C.
Thank you for your detailed answer. This is my build. I'm pretty sure everything is connected correctly and I can feel the vibration from the pump. The Alphacool Eisstation 40 DC-LT is only the case of the pump. I use the Alphacool Eisblock XPX Aurora Edge as water-block. The temperatures I took from Ryzen Master. Probably I have to install a different cooler. I still have an AMD Wraith Prism RGB cooler from my 2700x. Do you think it can handle the 5800x?
That should be able to at least eliminate your custom AIO as the problem if temperatures are cooler or the same or hotter than the AIO.
Not sure but I believe the Wraith Prism is rated for at least 105 TDP processors like yours. The Prism is bundled with the Ryzen 3900X which has a TDP rating of 105 watts, the same as your processor.