Ryzen Zen3 system build including follow up.

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timmmay

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#2611501 27-Nov-2020 06:17

Well, this morning the computer isn't working.

Last night I had it running HCI Memtest from a USB stick, it was at about 80% when I went to bed. This morning the fans were on, but nothing came up on the monitor when I turned it on. The power and reset buttons didn't do anything. I had to turn it off at the PSU - just like when it first arrived. After leaving it off for a while there's no change - it won't POST. The motherboard CPU light is on.

I guess it's going back to PBTech for them to work out what's wrong, an unreliable computer is no use to me. They can put the motherboard I actually ordered in, and I'll get the CPU heatsink upgraded at the same time.

Jase2985

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#2612769 29-Nov-2020 21:20

Ran my fathers PC up today. Didnt see temps any higher than 78deg running prime 95 and that was on the stock cooler in a average case for airflow. did you have the cpu cooler on properly?

on the plus the PC is about 20% faster than my 3600.

timmmay

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#2612843 29-Nov-2020 21:57

Jase2985:

Ran my fathers PC up today. Didnt see temps any higher than 78deg running prime 95 and that was on the stock cooler in a average case for airflow. did you have the cpu cooler on properly?

on the plus the PC is about 20% faster than my 3600.

No idea, PBTech did the assembly. R5 case is ok for airflow, but it's quite rather than cool. I'll end up with probably two front fans and one exhaust, probably Noctua.

The computer's back with them now since it failed after 2 days. Not sure now if the initial problem was the BIOS wasn't flashed or something else. Initially the RAM light came on, then just before I took it back the CPU light came on. I suspect some kind of hardware fault. Motherboard should be replaced by the one I ordered, if it fails again I'll probably RMA the entire thing and get an Intel. Hopefully they fix it up and do some kind of burn in before they send it back.

Once it comes back I'll give it a week burn in then get the Noctua NH-U14S cooler. Meant to be good, almost as good as water, and it's a reliable brand, current Noctua is 8+ years old and works perfectly.

timmmay

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#2615253 3-Dec-2020 06:03

PBTech diagnosed a faulty power supply. I've ran Handbrake / Prime95 for about 6 hours no problems, HCI Memtest ran overnight with no problems, so I think their diagnosis was correct. I'll run Prime95 for a few more hours today, and then run some general stability tests before I move hard drives over from the old PC. I'm not sure if the initial problem was an old BIOS or this. They also put the motherboard I ordered in, it's just that their website is not very clear - the website says B550 Pro v2 but it's actually still v1 but with a newer AX WiFi chip, they called it V2 so people knew it was the slightly newer version. Slightly misleading but it's fine.

The fans sound better now, I guess it was a power supply problem. I'm still going to go with the Noctua U12S CPU cooler (140mm version is too big with my RAM) and a couple of Noctua A14 case fans on PWM, plus I'll put an older but unused Noctua fan in the front case down by the disks at low speed for a touch more cooling. That should keep it cool and make it quieter.

Temperatures were lower once the power supply was replaced as well. Prime95 sits on 81 degrees C, it sits on about 35 - 40C when idle. When I turn "CPU Boost" off and run Novabench the peak temperature drops from 74C to 55C, the frequency drops from 4.3GHz to 3.6GHz, the score drops from 3115 to 2830, and rendering time increases by about 8%. I was just curious, I turned it back on, but interesting that the temp drop is fairly significant. For someone doing really intensive work that wants a really quiet PC the trade-off is probably worthwhile.

I noticed the RAM usage of the machine is a couple of GB lower than the older machine. I suspect ReFS and / or Storage Spaces uses up a bit of RAM, probably in a similar way that ZFS does. I haven't decided yet if I'll keep my ReFS Storage Spaces mirror. The disk is slower, sometimes takes a while in Windows Explorer to look at folders, and the disk noise when it's doing its scrubbing is frequent and somewhat annoying. I might just go with NTFS disks and keep even better backups.

mentalinc

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#2615254 3-Dec-2020 06:17

Thanks for the update.

I put a noctua-nh-d15-chromax-black-cpu-cooler in over the weekend and put the second fan towards the back of the case instead of the front if that's and option, really depends on clearance toward the side of the case.

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timmmay

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#2615268 3-Dec-2020 07:36

mentalinc:

Thanks for the update.

I put a noctua-nh-d15-chromax-black-cpu-cooler in over the weekend and put the second fan towards the back of the case instead of the front if that's and option, really depends on clearance toward the side of the case.

That's more cooler than I need, I think, plus apparently RAM clearance can be an issue. The one I linked above is a good cooler, very effective, very quiet :)

ratsun81

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#2615280 3-Dec-2020 08:08

You could install the gigabyte software for on the fly fan tweaking.

I find that with the fan curve that the gigabyte boards have the fans ramp up to aggressively, at least in my setup they do.

You have to install the App Center first then the System Information Viewer.

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timmmay

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#2615282 3-Dec-2020 08:19

ratsun81:

You could install the gigabyte software for on the fly fan tweaking.

I find that with the fan curve that the gigabyte boards have the fans ramp up to aggressively, at least in my setup they do.

You have to install the App Center first then the System Information Viewer.

The Ryzen CPU heats up pretty quickly when you put load on, so fans spinning up quickly is fine. I'll just put a better heatsink on, which blows towards the main fan, and better fans to increase airflow while keeping the case cooler. I specifically bought a case that's quiet so I should get decent quiet fans, Noctua lasts a really long time and are about the best available so I'm happy spending $200 or so on that.

If it's still too loud I'll try the Gigabyte software thanks.

timmmay

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#2617841 7-Dec-2020 22:14

I have the Noctua NH-U12S and two 140mm fans in. The idle temperature dropped a bit, from 40 - 45 to 30 - 35 (in a 23 degree room), but it's pretty close to silent. At 100% CPU in Prime 95 the max temperature has fallen from 95C to 65C, though it's pretty loud at that load. Prime95 does work it very hard, other programs like RAM test that takes 100% CPU it doesn't get so hot. The noise is also less annoying - a low, steady hum rather than an annoying whine. Their fans have a 6 year warranty, but my old PC has fans that are something like 10 years old and still working perfectly. Worth the $210 or so for the cooler and three fans (one more on the way to cool the hard drives).

Conclusion: Noctua good. Significant improvement over stock.

Jase2985

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#2617871 8-Dec-2020 05:22

i still dont know how you were getting 95 degrees with the stock cooler unless you were in a room that was 35 degrees and your case had zero ventilation.

timmmay

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#2617885 8-Dec-2020 07:38

Jase2985:

i still dont know how you were getting 95 degrees with the stock cooler unless you were in a room that was 35 degrees and your case had zero ventilation.

Maybe the CPU was fitted badly. I've online it's not uncommon.

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