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05-17-2020 02:33 AM
Operating System: Microsoft Windows 10 (64-bit)
Just changed thermal paste and blown the dust in my Z620.
With BIOS Idle FAN set to 0 / 5, I get this idle temps.
Is it a bit too high 47-50 @ IDLE ?
This is a comparison in full-load 100% before (GC-Extreme 2years+) and after (Phobya HeGrease Extreme) TIM replacement.
Differences are visible in full load. But the Idle scares me.
Should I add 1 step for BIOS Idle FAN 1 / 5 ?
3 REPLIES 3
05-17-2020 03:09 AM
Mentions: I did read @BambiBoomZ problem with faulty sensor reading (because of OS updates), did read the Z620 Manual and Quickspecs and some other forum threads.
Found out that workstations are ok with running these 44-60 degrees Celsius @ IDLE ... but I am not relaxed with it.
05-17-2020 01:54 PM - edited 05-17-2020 04:41 PM
Since your running in a dual CPU configuration in your Z620, (and you don't have the space to fit them), you can't use the Z420 liquid coolers, or larger 4 heatpipe HP CPU coolers. These are known to work rather well in single CPU Z620 systems. I'm guessing you are kind of stuck with the stock HP 3 heatpipe CPU coolers, (if you don't want to mod).
Personally, I recommend Thermal Grizzly Kryonaut thermal paste, it has a thermal conductivity of 12.5W/mK, compared to 8.5W/mK (e.g. both GC-Extreme and Phobya). As for pricing;
GC-Extreme - £9.99/3.5g
Phobya HeGrease Extreme - £3.75/3.5g
Thermal Grizzly Kryonaut - £5.99/1g
Yes, a little more expensive, but 1g will easily cover 2 CPU's. I prefer to thinly spread the paste across the CPU before mounting the heatsink.
I would also suggest that if your are using any high end GPU(s), consider removing any remaining PCI slot cover blanks to help the GPU breathe and stay cooler. In general, focusing on improving air flow through the chassis.
HP Z620 - Liquid Cooled E5-1680v2 @4.7GHz / 64GB Hynix PC3-14900R 1866MHz / GTX1080Ti FE 11GB / Quadro P2000 5GB / Samsung 256GB PCIe M.2 256GB AHCI / Passmark 9.0 Rating = 7147 / CPU 17461 / 2D 1019 / 3D 14464 / Mem 3153 / Disk 15451 / Single Threaded 2551
05-18-2020 11:05 AM - edited 05-18-2020 11:07 AM
1.Yes I am stuck with stock coolers which I ain't going to change them. I love the stock PRO design and modularity of Z620.
2. The backside GPU blanks is a good tip, thanks. I guess the dust is going in that way, so there should be no dust problems.
I did add 1 out of 5 levels in Bios IDLE FAN . |****
The temps got lower with 5 to 6 degrees, which is now closer to 40, which is now better for my psychique.
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