New 9900x build - high temps

Grrrrr

Grrrrr

Grrrrr

Soldato
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Hi all,

I've recently put together my first new build in about a decade and everything seemed to go pretty smoothly apart from the thread title.

CPU: 9900x
Mobo: MSI MPG B850 EDGE TI WIFI
Cooling: Lian Li HydroShift II LCD-S 360CL

CPU Idle: 50°
CPU after 1min of Cinebench: 95°
Case temps: 30°
Water temps: 25°

I wondered if I had put on too much thermal paste (the generic one that came with the cooler) and after taking the cooler off and checking, yes, i probably did. I've now scraped off most of the excess and only have a thin layer but it didn't do anything to help with temps, if anything they are slightly worse.

I still wonder if it's a thermal paste issue, so I've ordered some Arctic Silver 5, but in the meantime I wonder if anyone else has any thoughts on what the problem could be?

Thank you
 
Are you stock or overclocked?

With a decent cooler at stock settings you should be seeing around 80-85, with less optimal cooling possibly due to case or fan profiles you can see low to mid 90"s.

From memory in an NZXT H6 with a Silent Loop 3 240 AIO the 9900x was around 40/45 just doing internet and stuff, around 80/85 during cinebench, fan profiles were set for quiet with the pump at 75%

Two 140 pure wings in the bottom, and three 120 NZXT intake, 240 AIO in roof and a rear 120mm.

Cannot remember if my lad ran the curve optimizer but I know we didn't manually undervolt or set limits in bios.

What is your case, case fans? Your 360 orientation?
 
I dunno about MSI but Asus have a PBO setting which just basically lets rip to 95C, so something similar might be favourite?

The base temp sounds about right.
 
Vestas said:
I dunno about MSI but Asus have a PBO setting which just basically lets rip to 95C, so something similar might be favourite?

The base temp sounds about right.
Click to expand...
Yeah, idle temp on some of newer CPUs spike like crazy making idle temp look high.

95c is throttle temp, which they claim is safe but I prefer at least 10c cushion. ;)
 
need to check voltages and ideally what kind of power draw the cpu is going to in cb, stock 9950x power should be around 170-200w before you enable pbo, if the cpu is pulling over 250w for some reason then something in the bios is allowing the cpu to pull a tonne of power, regardless off cooler 90-95c is to be expected
 
doyll said:
95c is throttle temp, which they claim is safe but I prefer at least 10c cushion. ;)
Click to expand...

On the Asus board I have I set it to PBO 70C which throttles at 70C. I get something like 95% of the peak performance* on cpu for about 80% of the power and rarely hear fans. Phanteks 360 cooler.

OP hasn't come back so I guess they've found other PBO settings :)

*peak performance is the PBO 95C setting where it lets rip and the CCD with X3D cache is more like 97-98C.
 
Thank you, everyone. I had been keeping an eye on replies but not had the chance to sit down properly and report back on everything. The new thermal paste arrived today and after applying that everything is looking a whole lot better. I'm currently idling mid-40s and 85C under full load with very gentle fan/pump settings, cooler if i increase the RPMs.

It's kind of moot now, but to go back and answer some of the quetsions:
  • Motherboard is running stock
  • Case is Lian Li 217 Inf (so plenty cool enough, those front fans are huge)
  • Prior to today i had experimented with the fans running at all kinds of settings, but even running max it didn't do much to the temps
  • I hadn't used hwinfo before but downloaded that on the recommendation above and I'm loving the crazy levels of detail it gives
  • I mentioned it was my first new build in about a decade so I'm pretty out of the loop and 'PBO' meant nothing to me before this thread - I now know what I'll be experimenting with over Christmas :)
 
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