[SOLVED] Dangerously high 5900x temps

[leeeetian]

Got a prebuilt from CyberpowerPC so that I could snag a 3080 and 5900x. However, I'm facing extremely high temps on the CPU and feel like I've tried everything

• Got a new CPU cooler, H80i V2 Pro
• Re did thermal thermal paste, confirmed contact is being made. Pre applied thermal paste still gave same results so removed it and applied new, still same
• Bought new case fans, confirmed configurations. Front fans are intake, top and back fans are exhaust
• Cleared the dust
• Felt the pump, can feel vibrations and seems to be working
• Updated BIOS
• Maxed out the pump and fans
• Tried lowering the voltage on the CPU to 1.2/3 and did a stress test and it shot up to 100+ and shut down
• PBO is on auto
• Tried both CPU_FAN and CPU_OPT ports on the mobo. Manual said CPU_OPT was for water cooling so currently have it on that. Same result on either one

Idle temps are around 60-70 and it'll randomly shoot to 90+. Loading a game like monster hunter will bump it to 90+. GPU temps are perfectly fine hovering around 35-50. All the fans are working. Find it hard to believe that 2 coolers in a row are faulty but not sure what else it could be.. MOBO is x570 Gigabyte UD

 

[Karadjgne]

Are you sure about that Karadigne?
With a 360 mm custom loop my 5900x sits around 30C at idle, so I wouldn't be surprised to see one with a 120 mm aio idling at 40-50C.

If we allow another 10C for poor ventilation of the case we're at 60C for idle.

Maybe I'm wrong and we can pull the temperatures down a lot with the 120 mm aio, but I'm a little sceptical - if you're idling at 30-40C you're doing pretty well and I just wouldn't expect that with a 120 mm for this CPU.

Of course, there's no harm in checking the bios settings and power plan settings, but I think the expectation here is that a more robust cooling solution is required to get good performance from that CPU. A 120 mm AIO just isn't good enough.

Absolutely sure, 100% positive. You are falling into the same trap most ppl do, assuming size is a measure of ability. It isn't. Size is a measure of Capacity. A 120mm AIO is rated to handle somewhere around 140w, same as a Hyper212. A 240mm can handle @ 250w, same as a NH-D15. A 280mm is closer to 300w and a 360mm closer to 350w. That's capacity in wattage.

Underneath those limits is a different story. At 100w cpu output, there's multiple coolers that are Better than an NH-D15, the NH-12S being one of them. Simply put, it's more efficient, gets lower temps.



At 15w-20w, even an ancient, tiny, stock FX cooler shouldn't have any issues whatsoever with a 5900x at idle and be getting @ 10°C over ambient plus any Ryzen boosting.

I have 480mm in my loop and my 3700x sits at 40°C with occasional bumps to 50°C, in a shoebox with almost Zero actual airflow. And I'm fine with that since loads rarely reach 65°.

In a correctly working pc, idle is a measure of airflow. If there isn't any, idle will be high since it's physically impossible to cool an object below ambient temps by mechanical means. Ambient temp to an aircooler or aio at exhaust is case air, not outside air. If case temps are 50°C, the best the cpu can do is 50.1°C. Ambient temp is only outside air temp to an aio at intake and if idle is 60°C, then there's either an issue in the cpu, or Op lives in a sweatbox.

60-70°C is too high for any stock or close idle. There's either lack of airflow in the case, very high voltages, not an idle state (according to the pc), or something not right with the cooler installation. Period. Any one of those issues just gets multiplied with a load, leading to even higher than recommended or normal usage temps.

 

[Deleted member 2871437]

Absolutely sure, 100% positive.
...
At 15w-20w, even an ancient, tiny, stock FX cooler shouldn't have any issues whatsoever with a 5900x at idle and be getting @ 10°C over ambient plus any Ryzen boosting.
...

So, you can say all of that without considering the heat the RTX 3080 is putting into the case?

 

[BogdanH]

...asserting that it must not be properly mounted if the CPU is more than about 10-12 degrees above ambient temperature (assuming ...) is potentially misleading.

I'm sorry if you see it that way. Truth is, high idle temperature always indicate cooler is not mounted properly or fan(s) not working or water pump not working (in case of water cooling).
That is, high idle temperature has almost nothing to do with cooler's cooling performance.

The cooler is maybe just not up to the job

Yes, if idle temperatures would be within normal range, but your CPU goes up to 90°C at full load, then that indicates you need better cooler or better airflow.

 

[Deleted member 2871437]

I'm sorry if you see it that way. Truth is, high idle temperature always indicate cooler is not mounted properly or fan(s) not working or water pump not working (in case of water cooling).
That is, high idle temperature has almost nothing to do with cooler's cooling performance.

Yes, if idle temperatures would be within normal range, but your CPU goes up to 90°C at full load, then that indicates you need better cooler or better airflow.

With a RTX 3080 in poorly ventilated case in a small room, an inadequate air cooler is not only going to fail to maintain the CPU at 10-12 degrees about ambient temperature, the computer is actually going to raise the ambient temperature as well.

 

[Ash95]

I did a build the other day, 3700X paired with a cooler master ML240mm and the idle temp was over 90 degrees... was a pump failure. Switched it to a H100i EC and idle was 25 degrees.

I would definitely look at changed that AIO though, my H150i keeps my 5800X below 65 degrees.

 

[getochkn]

Here is a 3900x with the stock cooler that came with it. 1.2v, 4200 mhz clock set. At idle though, it uses 2 cores, one at 300mhz, one at 450mhz or so, so any cooler including a piece of cheese should help cool it at those speed. In the BIOS, it should be a similar load. My CPU is using 2.5W at idle, that should not make anyone's system shoot up to 60c at idle. Something else is wrong not cooler related or also, but not just the cooler.

 

[Nemesia]

Here is a 3900x with the stock cooler that came with it. 1.2v, 4200 mhz clock set. At idle though, it uses 2 cores, one at 300mhz, one at 450mhz or so, so any cooler including a piece of cheese should help cool it at those speed. In the BIOS, it should be a similar load. My CPU is using 2.5W at idle, that should not make anyone's system shoot up to 60c at idle. Something else is wrong not cooler related or also, but not just the cooler.

How did you get that maximum TDC, PPT and EDC to be at 520A and 1000Watts? Take a look at mine. I left everything at auto btw in the BIOS. No PBO or OC.

https://imgur.com/a/CmSXgmI

View: https://imgur.com/a/CmSXgmI

 

[Karadjgne]

Not hard to bump those. Both Gigabyte and MSI and to some extent ASRock do not adhere to AMD official recommended settings for TDC, PPT and EDC. Their PBO settings (I have PBO, PBO lvl 1,2,3 on an Asus Strix) are off the charts. Just using Dragon Center (MSI) will bump those up to serious values.

But those are limits. Only happens under extreme loads or OC, otherwise anything over AMD settings is just a higher stopping point. On the Aorus Master and Godlike boards, the values are so rediculously high the VRM's would burst into flame long before ever reaching the limits. You can't put 1000A through a VRM.

With a RTX 3080 in poorly ventilated case in a small room, an inadequate air cooler is not only going to fail to maintain the CPU at 10-12 degrees about ambient temperature, the computer is actually going to raise the ambient temperature as well.

Again, you miss the point. IDLE. that means the gpu is idle too. It's not putting out anywhere near its rated capacity. A 3080 might be capable of @ 320w, but at idle its @ 9w. That's it. 9w. That doesn't even require a cooler. Direct die to air would be sufficient.

It takes 0.005w to raise 1ft³ of air 1°F in 1 hour.
Or 1w to raise 1ft³ of air 3.3°F in 1 minute.

Unfortunately, a standard 120mm 50cfm fan can totally replace the air inside an ATX mid case in about 2 seconds or less. 9w isn't going to do anything to raise cpu temps nor case temps, 3080 or not, to the point it adds 20°C to a cpu at idle, not unless there's zero airflow or an issue with the AIO, like it's fan is not spinning or the pump is not working at rated capacity. With just 15w at cpu idle, the radiator is totally capable of handling that load Passively, doesn't even need the fan. Just needs the pump circulating the coolant. And the pump actually needs to be seated firmly, correctly.

Fix the idle temps, find that cause first and then figure out load temps, if they even need fixing at all.