Ryzen 9900x temps

[deshepherd]

Just putting together a new system using a Ryzen 9900x ... after install mboard, CPU and DDR5 I was running memtest86 to confirm that the RAM was ok ... tests passed fine but looking at the results saw it reporting min/max/av temps of 42/83/61 which seemed high - also at present BIOS reports temp of 45 while on the BIOS screen (nb memtest86 had RAM temps of 21/41/34 which seems more resonable) - CPU has a phantom spirit cooler and at present the case is fully open. By comparison on my 5800x3d PC memtest CPU temps were 32/71/49.
Quick google seems to suggest that 9900x temps are/can be high - are the figures I'm seeing "normal" for a 9900x or should I be looking at reseating the cooler etc!

 

[hornetstinger]

Could try undervolting the CPU.

I think it's the curve optimiser or something like -20 to -40

 

[Tetras]

Quick google seems to suggest that 9900x temps are/can be high - are the figures I'm seeing "normal" for a 9900x or should I be looking at reseating the cooler etc!

Can you run something like Cinebench and some games? Not sure how to judge memtest because don't know what level of CPU load is normal for that.

 

[deshepherd]

Can you run something like Cinebench and some games? Not sure how to judge memtest because don't know what level of CPU load is normal for that.

Not installed an OS (or even attached the SSD yet!) ... and this machine is going to be Linux.
Think these higher temps maybe expected as the "idle" freq of the 9900x is 4.4GHz vs 3.6GHz on 5800 so power will be higher. Article I'm seeing elsewhere seem to say that idle temps in the 40s is normal.
Anyway, trying with PBO -20 to see if anything changes

 

[Tetras]

Article I'm seeing elsewhere seem to say that idle temps in the 40s is normal.

Yeah, 40s idle, 60s average is fine, nothing to worry about there, 83 would also be fine on air if that's max load.

Just a question of what kind of load the CPU was actually dealing with for those average and max temps.

 

[deshepherd]

It was just running memtest86 from USB stick - this would be hammering the mem interface pretty hard and watching it for a bit the temp rises during the random data tests which I guess have more compuational activityt to generate the random values! I'd also assume that its just a "bare-metal" test so won't be doing anythig special to reduce power.
I'll look at the linux temperature monitoring and CPU loading utilities when I've got that installed to see if there's any more info then

 

[sastusbulbas]

It's normal, idle can be around mid 40's, sitting looking at a 9900x running stock here on the desk next to me with a Silent Loop 3 240 AIO and its at 46 idle, earlier it was 55 during a GTA game and now around mid 60's downloading 50 odd GB of data.
Previously with no fan curve it was at 36 idle but the CPU fan noise was too loud, that was with a BeQuiet AIO, three 120mm side intake fans and two 140mm bottom intake fans within an NZXT H6 case before adjusting any fans on a new build.

My own 7600x on this desk is at 48 currently doing very little.

Both stock settings, I hit mid 80's during Cinebench.

My lad on his 9900x is still playing with fan curves, we both will most likely look at under-volting and AMD Curve optimizer for these CPU's in the near future. I am sure the 9900x can also be set in Eco mode in bios at a much lower wattage if needed. We are still to do some homework on optimizing these for less noise during intense workloads and downloads or such as we get the occasional CPU fan spin up as the CPU ramps up.

I recommend putting your mind at ease by watching some video's of the CPU then look at the options everyone seems to be doing to all AM5 processors with under-volting and tuning.