Question Is 80 - 85 degrees a reasonable temperature for my build?

Mar 22, 2019
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Hello,

I just built a new machine with the following spec:

  • Intel Core i9 9900K 3.6Ghz
  • Gigabyte Z390 Aorus Xtreme mobo
  • Be Quiet Dark Rock Pro 4 cooler
  • NVidia GFX 1080
  • 32gb G Skill Trident Z memory
  • 2 x 1tb Samsung 970 Pro V-Nand M.2 drives
  • Corsair 850w Gold power supply
  • Be Quiet Base 900 case (one external fan and two front intake fans)
When I built it, I used the thermal paste stuff that comes with the dark rock cooler. Ambient room temperature is around 18 - 20 deg.

While the machine is idling, CPU-Z shows CPU temps of around 35 - 40 which I guess is reasonable. However I noticed that after gaming (Battlefield V for instance) the max temperatures have reached 85 or so.

After some research, I disabled multicore enhancement and retried it. Same temperatures at idle but under load the temps came down to around 75 - 80. Now, I understand what multicore enhancement does but my question really is whether 85 degrees C is even a temperature I should be worried about. I notice from the Intel datasheet that the max temp is 100 and even under Prime95 the temps (with multicore enhancement enabled) doesn't really go beyond 85 C.

Am I looking at normal temperatures or should I do something else here? Also, what's this SVID stuff all about? Can't seem to get to the bottom of whether it should be disabled (for normal gaming use) or not?

Appreciate your time,
JT

ps. Should also say I'm not interested in overclocking anything.
 
I'm wondering if anyone else on here has a similar build with air cooling, and what kind of temperatures they see during game load.

And to be honest, with regards the multicore enhancement thing - I couldn't really see a noticeable difference when it was off. So maybe that's the solution for me.
 
I could bring the curve down a little to kick them off sooner I guess because they do seem to keep the temperature under control. Going to add another exhaust fan at the top rear of my machine too and possibly check the mounting screws are tight. Just really surprised it burns this hot regardless. My previous i7 never came close (running around the 65 mark at all times)
 
See, I was also expecting around the 75 mark on load, hence this post. No idea how to bring it down though. Can try reseating and using different compound I suppose. Also going to put another exhaust fan in the box in case it's not being drawn out quickly enough. Any other ideas how I can bring it down a bit? I'd be happy at 75 (without disabling multicore enhancement)
 
Yes, definitely mounted it properly and removed the plastic. Didn't use a huge amount of the compound but everything looked okay to me. It's possible the screws weren't tight enough so i'll check that when I get home. I previously had a Noctua on my last machine so am accustom to fitting coolers with rear brackets etc.
 
i did look at your case and you could not had a fan on top of it check if you could use a higher cfm fan fo the back even a 140 mm on if you could there is also a bracket for a little front fan in the box that coild be had on top front .

According to the manual you can have two 140 or three 120 fans in the top, so I've ordered a single 140 to put at the rear back. Hopefully that'll be here today sometime.

Thanks for the responses so far. I've been reading about delidding the CPU - is that worth the risk? (I'm assuming there would be risk given I've never done it before)
 
Well, I installed another exhaust 140 fan at the top-rear of the case today and it didn't really change much. Temperatures still reaching 80 C (plus it actually does seem pretty cool inside the case, so likely a seating issue i'd think). Also adjusted all fans to kick in a little earlier but that didn't change much either.
 
Jayztwocents have pointed out in a couple of videos that these newer Intels often don’t have perfectly flat top of the cpu heatspreader. He shows how lapping them to get them flat can have significant improvements in cpu temperature.
Jaytwocents wasn't even born when concavity discussions were happening here on the core2duo/quad, and lapping of CPU IHS's has been common for extreme cooling for good while before that for the same reasons.
 
Very timely article on Tom's relating to your issue. https://www.tomshardware.com/reviews/intel-9900kf-vs-9900k-overclock-comparison,6038.html

Note that there is a great variation in temperature among the top 23 out of 200 chips this overclocker tested, even at the same voltage. One of the 9900Ks ran at 1.32v/5300MHz/92c while another sample listed just below it ran at 1.32v/5200MHz/81c, which is an 11c difference! (see table titled "Max Passable Freq Water Cooled"). The lowest temp was 71c/1.30v/5300MHz on a single CPU vs highest temp at 96c seen on two different CPUs at 1.38v/5300MHz and 1.41v/5200MHz. 13thmonkey's insight is spot-on when stated, "85 is not great, but not bad."

So, how are your voltages and clocks compared to the above figures? Are you in the ballpark?
 
As it stands just now, with multicore enhancement ON and the extra exhaust case fan, I'm now seeing running temps of around 70, occasionally fluctuating up to around 80 but not for long. Adjusted all fans to kick in a little earlier which seems to have helped now they are all watching the CPU temperature. Oddly it's only Battlefield V which seems to push the temps really far up. In fact, it seems to stress the PC more than Prime95 and HeavyLoad. However in other games like Apex Legends, the CPU is happy to sit around 60 - 65 C. I'm going to try a different thermal paste and reseat when the stuff arrives on Monday, but failing that - I'll just have to accept that the I9 is a bit of a fireball.
 
So, how are your voltages and clocks compared to the above figures? Are you in the ballpark?

I'll be honest, I don't even know what I'm looking for with voltages. With multicore enhancement on, it shows all cores at 5000 Mhz but oddly they drop to 4700 in-game. I presume this is due to ME being set to 'auto'. No idea what they should be though.
 
I have the same processor and these temperatures are normal under CPU intensive operation.

I have a Noctua D15 fan and it does a wonderful job, while also being quiet, much more than my previous system based around a 3770k and a Arctic freezer 13.

If you are playing games and have these temperatures I would say that there isn't adequate cooling. I only have 80c temperatures while encoding 2 hour videos (with Handbrake for example) or playing with effects in Vegas 13.
 
It’s actually only one game (Battlefield 5). Otherwise it’s usually sitting around 60 - 70 C for other games and around 35 - 40 for idling in Windows. Gonna try reseating on Monday and see how that goes.

Thanks all for your various feedback so far.