High CPU temps in BIOS First Build

[BigP_00]

First Build CPU 84C in BIOS

So I built my first PC

-Ryzen 9 7900X
-RTX 4070 Super
-32 GB DDR5 6000MHz
-1TB NVME
-850W PSU
-Coolermaster 360L Liquid AIO

I got the system to post, all fans spinning (although one stopped for some reason just now got to figure out why). Anyway when I first booted I was getting steady temps of 74C in BIOS, I thought maybe I pasted improperly (used way too much thermal paste) so I repaired and remounted the cooler and now it’s 84C steady in BIOS. I top mounted my radiator with the fans as intake, CHATGPT says this is the issue cuz hot air rises but I figure that wouldn’t make that much of a difference for my CPU to be 84C. I’m lost and could use some advice. Pls help, I want to install windows but don’t want to do it while my CPU is 84C while it’s doing nothing. Also not temps do not get better if I press down on the cooler so I feel like that isn’t the issue. I’ve attached some photos down below.

[xAcid9]

Did you remove the sticker on the baseplate? 

What does the thermal paste look like when you remove the waterblock?

[Beerzerker]

2 hours ago, BigP_00 said:

First Build CPU 84C in BIOS

So I built my first PC

-Ryzen 9 7900X
-RTX 4070 Super
-32 GB DDR5 6000MHz
-1TB NVME
-850W PSU
-Coolermaster 360L Liquid AIO

I got the system to post, all fans spinning (although one stopped for some reason just now got to figure out why). Anyway when I first booted I was getting steady temps of 74C in BIOS, I thought maybe I pasted improperly (used way too much thermal paste) so I repaired and remounted the cooler and now it’s 84C steady in BIOS. I top mounted my radiator with the fans as intake, CHATGPT says this is the issue cuz hot air rises but I figure that wouldn’t make that much of a difference for my CPU to be 84C. I’m lost and could use some advice. Pls help, I want to install windows but don’t want to do it while my CPU is 84C while it’s doing nothing. Also not temps do not get better if I press down on the cooler so I feel like that isn’t the issue. I’ve attached some photos down below.

 

 

First off you're trying to draw air in from the top down, that goes against what heat wants to do naturally and that's to rise.

The guys on CHATGPT are correct about how the setup should work.

Your rad fans need to be reversed to blow up and out instead of in and down, taking advantage of the natural rising of heat which will help remove it.

The fans I see at the side should be blowing air in instead of out, that way you have air coming in to cool the board and other things, then all that heat will be drawn up and out the top through the rad with the air pressure assist they'll give by doing that.

So:
Reverse the direction of your fans up top to blow up and out and be sure the side fans are blowing in instead of out, you should notice a difference right way when done.
After that, be sure to check temps UNDER LOAD, not at idle and see where they really are.
Use a monitoring program such as HWMonitor for example to see these temps in real time while in the OS because what's seen in the BIOS is at idle only (No load).

Let us know what happens.

[kitnoman]

So it's 84c already while still in the bios? i'm going on a limb here, but it's most likely a mounting issue. Either too loose or too tight. Try to lay the case to it's side so the motherboard would lay flat. Then remove the block and just turn it on without it. Go to the bios and check the temps(don't worry, it won't do anything bad to your cpu. Then take, cpu block and gently press it to the cpu without screwing it. Slowly apply downward pressure, making sure not pressing too much. While pressing, check if the temp drop to 50-70c. If it does, turn it off and screw it in, but just hand tight it and don't use a screw driver. If the temps does not change, then either check the cpu or AIO, by testing and replacing them, one at a time. Well if you have a spare that is.

[OU812]

Uneven mounting pressure. Look at the mounting screws. They are not equal.

[leclod]

(You have 6 fans intake and 1 fan exhaust, the 6 fans are competing for a little air)

Edited September 15 by leclod