[Question] Is the following combo viable?

TheEpsilonToMyDelta · August 19, 2020

I've been putting together my first gaming PC over the past few months. As of today I have a Ryzen 3400g on a Gigabyte A-320-S2H motherboard with no discreet graphics. I have a pretty barebones "DS" case and I'm using the PSU that came included with it (I know it's terrible but at the time I had lost my old PC, needed a new one and couldn't afford anything better). I want to start upgrading it, starting it with the PSU. Money is tight right now so the highest I can aim for are the following PSUs, all of which are 80+ Bronze:

Seasonic S12-550 (III), 550w
Corsair CV450, 450w
GameMax VP-500, 500w
GameMax GP-500, 500w
Aerocool KCAS Plus 500w
Cooler Master MPX-5001-ACAAB 500w.

I intend to eventually get a discreet graphics card, probably an RX570/580 or RX5500 XT. I want to know if any of these PSUs can handle the 3400g + the graphics card alright. Thanks in advance!

lmeneses · August 19, 2020

Since they're 500w, yes, they all in theory can support it, but the quality of some of those is not good. See how they rank on this list

mariushm · August 19, 2020

47 minutes ago, TheEpsilonToMyDelta said:

I've been putting together my first gaming PC over the past few months. As of today I have a Ryzen 3400g on a Gigabyte A-320-S2H motherboard with no discreet graphics. I have a pretty barebones "DS" case and I'm using the PSU that came included with it (I know it's terrible but at the time I had lost my old PC, needed a new one and couldn't afford anything better). I want to start upgrading it, starting it with the PSU. Money is tight right now so the highest I can aim for are the following PSUs, all of which are 80+ Bronze:

Seasonic S12-550 (III), 550w

Corsair CV450, 450w

GameMax VP-500, 500w

GameMax GP-500, 500w

Aerocool KCAS Plus 500w

Cooler Master MPX-5001-ACAAB 500w.

I intend to eventually get a discreet graphics card, probably an RX570/580 or RX5500 XT. I want to know if any of these PSUs can handle the 3400g + the graphics card alright. Thanks in advance!

I'd go Seasonic , Cooler Master, Corsair CV , Aerocool, GameMax ...

Seasonic may be a bit overpriced, I guess it could vary from country to country, but here Seasonic power supplies are sold with a markup due to reputation and brand name.

I'm placing Corsair CV lower than Cooler Master because it's only rated 450w at <= 30c ambient temperature, if the temperature inside your case goes above 30 degrees you're supposed to de-rate the power supply by around 10-20% and in that case the already low 12v output rating (36A x 12v = 432w) should be read at somewhere around 350-380w on 12v

The Cooler Master psu is rated 43A on 12v (460w) at up to 40c ambient temperature.

Seasonic is rated at 40c ambient, for the 550w model it will output up to 45.5A (546w) on the 12v output.

For reference your 3400g probably consumes up to around 80 watts from the 12v output of your power supply.

A RX 570 consumes up to ~175w, RX 580 will go up to ~225w. The 5500xt will go up to 125w and 5600xt up to 160w.

In nVidia's camp, 1060 is ~125w , 1070 is ~150w, 1650 is 80w, 1650 super is 95w , 1660 is 135w, 1660w super is 110w

Your motherboard will consume maybe 10w from 3.3v and 5v to power chipset, onboard audio and network

Your ram consumes maybe 2 watts per stick, usually powered from 5v output of your psu and each hard drive consumes around 6-8 watts (half from 5v and half from 12v). SSDs will consume less, and only from 5v, usually 1-2w when reading, up to 3-5w during writing.

So you're looking at up to around 300w taken from 12v output of your psu, which means you'll want a power supply that can provide at least 400w on the 12v output ... that would be 400w/12v = 33A ... pretty much any 450w psu should be able to do this.