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Roken

Member

From: South Wales, UK

Registered: 2012-01-16

Posts: 1,340

[SOLVED] Power draw

I can find a huge number of resources that let you measure battery power draw, but what about the desktop.

My motive is that my machine has upgraded significantly over the past few months (RTX3090 instead of GTX1060, 128Gb RAM instead of 32Gb, AMD 5900X instead of 3900X, B550 MB instead of B450, and additional M2 SSD etc.) and I'm sure that the newer stuff needs more power. My current PSU is a Corsair 750W, but I want to make sure that I still have headroom, but I can't find a way in system to measure the power draw.

To be clear, I'm not experiencing any problems, but I like to not be at the red line.

Last edited by Roken (2024-12-08 22:42:19)

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Ryzen 5900X 12 core/24 thread - RTX 3090 FE 24 Gb, Asus B550-F Gaming MB, 128Gb Corsair DDR4, Cooler Master N300 chassis, 5 HD (2 NvME PCI, 4SSD) + 1 x optical.
Linux user #545703

/ is the root of all problems.

jonno2002

Member

Registered: 2016-11-21

Posts: 848

Re: [SOLVED] Power draw

get a mains power meter

jl2

Member

From: 47° 18' N 8° 34' E

Registered: 2022-06-01

Posts: 1,248

Re: [SOLVED] Power draw

RTX 3090 GPU    350 watts
Top-Tier CPU (e.g., Intel Core i9 13900K)    253 watts
Motherboard    80 watts
4 M.2 or 2.5" SSDs    36 watts
3 Case Fans (120 mm)    18 watts
2 CPU Fans (120 mm)    12 watts
Total Estimate:    749 watts
Recommended Power Supply Wattage:    900 wattsRTX 3090 GPU    350 watts
Top-Tier CPU (e.g., Intel Core i9 13900K)    253 watts
Motherboard    80 watts
4 M.2 or 2.5" SSDs    36 watts
3 Case Fans (120 mm)    18 watts
2 CPU Fans (120 mm)    12 watts
Total Estimate:    749 watts
Recommended Power Supply Wattage:    900 watts

The 5900x uses 100W less (I have the same one) unless you do some PBO/overclocking stuff, So you should be on the green, actually quite on par with the recommendation of [power draw of all components] + 100W => 749W - 108W + 100W = 741W ~ 750W
Anyway, if you don't have any problems don't bother with it, you do *not* need a overpowered 1000W PSU, if it works it works.

Have you given it a nice and old CPU+GPU stress test? I recommend "furmark" for the GPU and "stress" for the CPU, IIRC both are in the repos.

BTW the only PSUs that will report the power draw to the OS is the corsait *i line, it's possible to read those values out in linux.

Last edited by jl2 (2024-12-08 18:49:14)

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kgtuning

Member

From: New Hampshire

Registered: 2015-09-30

Posts: 60

Re: [SOLVED] Power draw

The rtx 3090 wattage numbers might not be correct… my evga 3090 ftw3 has a decent amount higher vbios. Ie 550watt bios and uses 480watts under windows in game. Just something to think about. Maybe different windows vs linux.

Roken

Member

From: South Wales, UK

Registered: 2012-01-16

Posts: 1,340

Re: [SOLVED] Power draw

The 3090 is an FE - so nothing fancy done with it. If you guys think I'd good with what I have, I'll live with that.

I'd forgotten all about furmark - thanks for the reminder

Gonna mark as solved, since what I want doesn't seem possible within the OS. I considered getting a power meter, but honestly, probably not worth it. I'm unlikely to be upgrading any more power hungry components in the forseeable.

EDIT: As an aside, I set a CPU stress test and GPU furmark (on a loop) at the same time, and no obvious problems with both CPU and GPU at 100%

Last edited by Roken (2024-12-08 22:47:56)

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Ryzen 5900X 12 core/24 thread - RTX 3090 FE 24 Gb, Asus B550-F Gaming MB, 128Gb Corsair DDR4, Cooler Master N300 chassis, 5 HD (2 NvME PCI, 4SSD) + 1 x optical.
Linux user #545703

/ is the root of all problems.

kgtuning

Member

From: New Hampshire

Registered: 2015-09-30

Posts: 60

Re: [SOLVED] Power draw

The 3090 is an FE - so nothing fancy done with it. If you guys think I'd good with what I have, I'll live with that.

I'd forgotten all about furmark - thanks for the reminder

Gonna mark as solved, since what I want doesn't seem possible within the OS. I considered getting a power meter, but honestly, probably not worth it. I'm unlikely to be upgrading any more power hungry components in the forseeable.

EDIT: As an aside, I set a CPU stress test and GPU furmark (on a loop) at the same time, and no obvious problems with both CPU and GPU at 100%

If it’s a 3090fe than you should be good unless you are having problems or want to upgrade just to upgrade.