Is my 400w PSU enough for my RX 580?

[thebluebumblebee]

@John Naylor , Really? So the 500 watt CM will work for him but the 400 watt EVGA won't, even though the CM unit failed its testing while the EVGA did not? Seriously? By that reasoning, a HANTOL ATX 900W would be better!

Can I please get people to understand that the manufacturer's stated wattage rating of a PSU is far less important than its actual 12 volt output at a rated temperature? For the good PSU's that we recommend here on TPU, most of them have very similar 12 volt capacities and manufacturer's stated wattage rating. Look at that EVGA. It;s rated for 360 watts for 12 volts and an over all rating of 400 watts. A Seasonic S12III 550 watt is rated for 546 watts on it's 12 volt rail.

 

[Sithaer]

I did use a cheapo Thermaltake TRS 450W PSU with my current system for like ~6 months until I bought a new PSU. 'Thermaltake PSU was a leftover from my old low power i3+gtx 950 system where it was fine'

It did work and it was stable but once both GPU and CPU was stressed enough 'like any modern game really' the PSU fan ramped up and the noise was way too much for my taste so it had to be replaced.

Even tried it with a Gigabyte Aorus Xtreme RX 580 for a day when I had that card borrowed and it still worked but at that point the fan noise was worrying me.

 

[damric]

If you are not an electronics technician, a good indication of the quality of a PSU is the warranty and the temperature rating. A temperature rating of 25-30'c means there is no way in hell this should be used in a gaming computer. A warranty of 2 years tells me that the company itself finds this product to be a risk. For the electronics technicians, those 2 specs also indicate that there are cheap capacitors that the dielectric will evaporate out, and within 2 years time it will no longer be filtering properly. DC output that should look like this -------- will look like this ~~~~~~ and wreak havok on your whole system until it kills itself or the rest of your computer. This will happen a lot faster when under higher temperatures because of the dielectric evaporation. Time and temperature...the enemies of cheap shitty PSUs.

 

[moproblems99]

It did work and it was stable but once both GPU and CPU was stressed enough 'like any modern game really' the PSU fan ramped up and the noise was way too much for my taste so it had to be replaced.

I dunno my 3900x would like to have a word with you. It usually sits at less than 20%. Sometimes even less.

 

[Sithaer]

I dunno my 3900x would like to have a word with you. It usually sits at less than 20%. Sometimes even less.

For example Far Cry 5 did put enough stress on my system that I could hear the PSU fan noise trough my headset and this happened unless I was playing old/potato games.

I also have my FPS capped btw so no extra stress on my system for no reason either.

With my current PSU its dead silent 'Fan that is',thats why I went overkill with this 650W cause I wanted to be sure that this wont happen cause it was really annoying me.

 

[moproblems99]

For example Far Cry 5 did put enough stress on my system that I could hear the PSU fan noise trough my headset and this happened unless I was playing old/potato games.

I also have my FPS capped btw so no extra stress on my system for no reason either.

With my current PSU its dead silent 'Fan that is',thats why I went overkill with this 650W cause I wanted to be sure that this wont happen cause it was really annoying me.

I was more so commenting on the any modern game will load the GPU and PSU. That statement is only true if you a have a potato for a CPU. Maybe a sweet potato.

 

[Sithaer]

I was more so commenting on the any modern game will load the GPU and PSU. That statement is only true if you a have a potato for a CPU. Maybe a sweet potato.

Well I generally just shared my personal experience with a rather cheap 450W PSU combined with an RX 570 and a 580 since thats what the topic was about.

In my case thats what happened so personally I would avoid using a 400W PSU with a 580,maybe a 570 if its a decent unit unlike what I had previously.

I know the first gen Ryzens are aging but I still wouldn't call my 1600x a potato CPU just yet.

Also that part doesn't really matter anyway since it was the total power draw under gaming load that was too much for my old PSU and it ramped up the Fan speed.
It started to happen as soon as I put the RX 570 in my system,even with undervolting that PSU could barely handle it.
I knew that this card will draw fairly more power than my GTX 950 I just did not expect my PSU to react this badly.

 

[elpapimejor]

Yup, turns out the mobo was fried, ordered another one on eBay (only 20$) and its working like a charm.

Don’t have any thermal paste rn, so using toothpaste but getting some from my teacher tomorrow.

The RX 580 wouldn’t fit in the case because the fking Sata cables are in the way, so I got some angled ones and and pushed it in there.

 

[eidairaman1]

Yup, turns out the mobo was fried, ordered another one on eBay (only 20$) and its working like a charm.

Don’t have any thermal paste rn, so using toothpaste but getting some from my teacher tomorrow.

The RX 580 wouldn’t fit in the case because the fking Sata cables are in the way, so I got some angled ones and and pushed it in there.

Are you using the evga psu?

 

[elpapimejor]

For now, yes

 

[eidairaman1]

Keep it