Re: how many W a PSU for non-gaming Debian?

[Linux-Fan]

Emanuel Berg writes:

Linux-Fan wrote:

>>> CPU power doubled to account for short-time bursts.
>>
>> Double it, that something one should do?
>
> In Intel world, yes :) In AMD world it seems to be slightly
> better, cf.:
> https://images.anandtech.com/graphs/graph16220/119126.png
>
> The TDP is given in the labels whereas the actual max power
> consumption observed is in the diagram. It seems that for
> AMD systems, the most extreme factor observed there is
> 143.22/105 = 1.364 [...]

OK, included ...

> SSD highly depends on the model. No need to argue for one
> general figure over the other. I think my SSD is specified
> 14W, but it is large and not the "newest" :)

OK, it says the SSD and RAM are

  Corsair Vengeance LPX · DDR4 · 2*8GB=16GB · 3600Mhz

  250GB Kingston KC 2000 (SSD/NVMe/M.2)

if one can find exact digits, that's optimal, but what do you
search for to find out? I mean in general? The model name
and ... ?

... datasheet
... power consumption



[v] https://www.kingston.com/datasheets/SKC2000_us.pdf

This does not yield anything ineteresting for the RAM here, but for the SSD we get a useful datasheet this way: Which indicates on page 2 that the max. power consumption is 7W under heavy write loads. I get most of my estimates derived from the figures of a PC magazine I regularly read :)

Anyway, the computation now lands at 307 W.

  device  model/category                     max W   note
  -------------------------------------------------------------------------
  CPU     AMD Ryzen 3, 4 cores                89     exact plus extra   [i]
  fans     80 mm (3K RPM)                      9     3*3W =  9W        [ii]
          120 mm (2K RPM)                     12     2*6W = 12W        [ii]
  GPU     geforce-gt-710                      19     exact            [iii]
  mb      Asus ROG Strix B450-F Gaming AM4   101     exact excl CPU    [iv]
  RAM     DDR3 (1.5V)                          3     actually a DDR4   [ii]
  SSD                                          2.8                     [ii]
  -------------------------------------------------------------------------

3W is for one module per [ii] but further above you write 2x8GB so why not at least compute it at 6W? Also, SSD could go up to 7W per datasheet [v]. For actual PSU sizes this will end up at 350W min. which is OK I guess.

total, with +30% wiggle room:
(ceiling (* 1.3 (+ (* (/ 143.22 105) 65)
                   (* 3 3) (* 2 6)
                   19
                   (- 166.2 65)
                   3
                   2.8) )) ; 307 W

  [i] https://www.amd.com/en/products/apu/amd-ryzen-3-3200g
      https://images.anandtech.com/graphs/graph16220/119126.png
 [ii] https://www.buildcomputers.net/power-consumption-of-pc-components.html
[iii] https://www.techpowerup.com/gpu-specs/geforce-gt-710.c1990

[iv] https://www.techporn.ph/review-asus-rog-strix-b450-f-gaming-am4- motherboard/ https://www.techporn.ph/wp-content/uploads/ASUS-ROG-Strix-B450-F- Gaming-Benchmark-1.jpg

[...]

HTH and YMMV
Linux-Fan

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