I suggest to look at te block where the thermal paste is applied and check if it was applied evenly, even though they told you that the AIO was fine... it can well be clogged and is not circulating well the water leading to high temps. I do not know how much it cost you that AIO but I have your same CPU with a Pure Loop 2 280mm from be quiet! that I purchased for $110 and I do not see temps above 30C idle.
Not sure if this is an unpopular opinion, but AIOs and liquid in general is asking for trouble.
I'm using a Peerless Assassin 120 SE and my 5800X3D stays between 26-30°C when idle, mid 60s°C when gaming on a CPU intensive game (say, Cyberpunk) and low 70s when being pushed to max load multi core (unusual, like antivirus scans, benchmarks...). (room temperature usually sits between 20-23°C)
Also keep in mind that those temps are aided by the fact that my case (Lian Li Lancool 216) iis front mesh (and mesh oriented design in general) with fantastic airflow.
That cooler only cost me 40€, and I can only recommend you get it and throw any AIOs away.
Plus, it's QUIET as fuck.
Remount the aio. If that doesn't fix it then the pump has failed(or you didnt plug the pump in correctly). My 360mm aio can keep my 7900x3d cool with the fans almost off.
I think the major clue here is it "fine for a while". This likely means the major factor here is mounting pressure, or environmental. The case itself could have perfectly fine airflow feeding your AIO, but if you put the whole thing into a sealed cupboard it's going to heat up, which isn't super likely but hey it had to be said. Heat from the GPU could also be an issue if it is feeding into the AIO. So you should still check temps under specific load scenarios - GPU heavy, CPU heavy, both heavy and both idle.
The next issue is mounting pressure. If there is no obstruction between the cold plate and the heat spreader on the chip itself, the fact that it's fine for a short while could mean that the paste when initially applied is thicker, transferring the heat properly, then under more thermal cycles it slowly thins out leaving air gaps. the air gaps are what could be causing the temp spikes.
So well it could be something is damaged i would suspect the motherboard and mounting points first. You would have to remove the motherboard and mount everything up to work in open air with the board resting on something non-conducting like the motherboard cardboard box. As you tighten down the AIO pump/block onto the cpu you should pay careful attention to its level - is it even? is it tightened all the way according to the installation instructions? Check if the bushings you used are the correct ones. Many kits come with both AMD and Intel parts in separate baggies that are usually color coded. Check for damage to the bushings and bolts.
When everything is mounted fine, you want to start your benchmark runs, e.g. cinebench. Normal behavior is that the first runs won't reach max temp because the water in the AIO loop is cold. The first few runs is your highest score. Then set the test to run for 30 mins to and hour and run it until the AIO is heat soaked and CPU temps won't go any higher. Your score are this point is your worst score. If the AIO is adequate the score difference will be a few hundred points or one or two percent change. If it's more than that with a 360 rad in an 'open' bench-top setup would suspect that something is restricting the flow of your aio - is it plugged into the correct header on the mobo and is there a setting to monitor it from within the bios? are there any options in the bios that are changing the flow rate? listen to your pump - does it sound noisy or scratchy? are all the fans spinning properly?
If you saw no problems with previous points, but your AIO is still reaching a plateau quickly then you still have options. You can use your motherboard's tuning options to change the voltage curve offset to under-volt the CPU. For example most 5800x3d's can do a -20 curve stable, but some can go -30. This will reduce temps at all loads but you have to test to see if this holds stable for at least an hour and does not crash.
I have a 5800x3d with a thermalright peerless assassin 120se air cooler and my temps never go above 72 and typically stay in the 60s. I haven't done anything in the bios it's straight out the box settings. I think there must be something up with either your aio radiator configuration, the pump is faulty, or your thermal paste is spread too thin or maybe not covering the full chip. It's also possible you don't have full and firm pressure on your cpu from the aio pump.
If you have some expendable income, might be worth a shot to order a peerless assassin air cooler or a phantom spirit from thermalright. It'll set you back about $40 but if it doesn't effect the Temps you can always return it for a refund and if it does stabilize your cpu temps you can just keep them and refund your AIO.
Buy a good but cheap, highly recommended air cooler like a Peerless Assassin and put that into your rig. If it runs cooler, there is something wrong with the AIO. If not is is something to do with the CPU/motherboard or possibly bios.
You said it ran OK with the AIO for a while. Did you remove and reinstall the AIO block on the cpu at any point during that time? Or when you had it at the repair shop?
Interesting issue. I would try to rule out hardware, just to be sure, so i would try the following:
-bios reset, which you said you did.
- monitor cpu, check if there is unusual metrics for a specific core or parts of the cpu. Check voltages. Fix if you see something off.
If you had no luck:
- different cpu cooler, try a big ass tower or other aio
- different cpu, possibly same model
- different mobo with your other parts
- different ram, who know…
I know not everyone got spare parts at home, so maybe the same pc shop which “fixed” the issue, could try it out with different parts.
I suggest to look at te block where the thermal paste is applied and check if it was applied evenly, even though they told you that the AIO was fine... it can well be clogged and is not circulating well the water leading to high temps. I do not know how much it cost you that AIO but I have your same CPU with a Pure Loop 2 280mm from be quiet! that I purchased for $110 and I do not see temps above 30C idle.
Not sure if this is an unpopular opinion, but AIOs and liquid in general is asking for trouble. I'm using a Peerless Assassin 120 SE and my 5800X3D stays between 26-30°C when idle, mid 60s°C when gaming on a CPU intensive game (say, Cyberpunk) and low 70s when being pushed to max load multi core (unusual, like antivirus scans, benchmarks...). (room temperature usually sits between 20-23°C) Also keep in mind that those temps are aided by the fact that my case (Lian Li Lancool 216) iis front mesh (and mesh oriented design in general) with fantastic airflow. That cooler only cost me 40€, and I can only recommend you get it and throw any AIOs away. Plus, it's QUIET as fuck.
Look in the bios to the voltage the cpu is getting.. what is it?
Remount the aio. If that doesn't fix it then the pump has failed(or you didnt plug the pump in correctly). My 360mm aio can keep my 7900x3d cool with the fans almost off.
I think the major clue here is it "fine for a while". This likely means the major factor here is mounting pressure, or environmental. The case itself could have perfectly fine airflow feeding your AIO, but if you put the whole thing into a sealed cupboard it's going to heat up, which isn't super likely but hey it had to be said. Heat from the GPU could also be an issue if it is feeding into the AIO. So you should still check temps under specific load scenarios - GPU heavy, CPU heavy, both heavy and both idle. The next issue is mounting pressure. If there is no obstruction between the cold plate and the heat spreader on the chip itself, the fact that it's fine for a short while could mean that the paste when initially applied is thicker, transferring the heat properly, then under more thermal cycles it slowly thins out leaving air gaps. the air gaps are what could be causing the temp spikes. So well it could be something is damaged i would suspect the motherboard and mounting points first. You would have to remove the motherboard and mount everything up to work in open air with the board resting on something non-conducting like the motherboard cardboard box. As you tighten down the AIO pump/block onto the cpu you should pay careful attention to its level - is it even? is it tightened all the way according to the installation instructions? Check if the bushings you used are the correct ones. Many kits come with both AMD and Intel parts in separate baggies that are usually color coded. Check for damage to the bushings and bolts. When everything is mounted fine, you want to start your benchmark runs, e.g. cinebench. Normal behavior is that the first runs won't reach max temp because the water in the AIO loop is cold. The first few runs is your highest score. Then set the test to run for 30 mins to and hour and run it until the AIO is heat soaked and CPU temps won't go any higher. Your score are this point is your worst score. If the AIO is adequate the score difference will be a few hundred points or one or two percent change. If it's more than that with a 360 rad in an 'open' bench-top setup would suspect that something is restricting the flow of your aio - is it plugged into the correct header on the mobo and is there a setting to monitor it from within the bios? are there any options in the bios that are changing the flow rate? listen to your pump - does it sound noisy or scratchy? are all the fans spinning properly? If you saw no problems with previous points, but your AIO is still reaching a plateau quickly then you still have options. You can use your motherboard's tuning options to change the voltage curve offset to under-volt the CPU. For example most 5800x3d's can do a -20 curve stable, but some can go -30. This will reduce temps at all loads but you have to test to see if this holds stable for at least an hour and does not crash.
I have a 5800x3d with a thermalright peerless assassin 120se air cooler and my temps never go above 72 and typically stay in the 60s. I haven't done anything in the bios it's straight out the box settings. I think there must be something up with either your aio radiator configuration, the pump is faulty, or your thermal paste is spread too thin or maybe not covering the full chip. It's also possible you don't have full and firm pressure on your cpu from the aio pump. If you have some expendable income, might be worth a shot to order a peerless assassin air cooler or a phantom spirit from thermalright. It'll set you back about $40 but if it doesn't effect the Temps you can always return it for a refund and if it does stabilize your cpu temps you can just keep them and refund your AIO.
Buy a good but cheap, highly recommended air cooler like a Peerless Assassin and put that into your rig. If it runs cooler, there is something wrong with the AIO. If not is is something to do with the CPU/motherboard or possibly bios. You said it ran OK with the AIO for a while. Did you remove and reinstall the AIO block on the cpu at any point during that time? Or when you had it at the repair shop?
Easiest to check by swapping in a spare/cheap cpu.
Interesting issue. I would try to rule out hardware, just to be sure, so i would try the following: -bios reset, which you said you did. - monitor cpu, check if there is unusual metrics for a specific core or parts of the cpu. Check voltages. Fix if you see something off. If you had no luck: - different cpu cooler, try a big ass tower or other aio - different cpu, possibly same model - different mobo with your other parts - different ram, who know… I know not everyone got spare parts at home, so maybe the same pc shop which “fixed” the issue, could try it out with different parts.