Radeon Rx570 on 300w psu?

Gentwee · 21 Jun 2019 at 15:12

I've been offered an RX570 to replace my internal gfx card which is broke.

Specs say it's needs a 450w PSU but mines only 300w. It's a BeQuiet 300w (s6-sys-ua-300w) so hopefully decent quality but is old and has no 6 pin connector so an adaptor would be needed.

All that's in the pc ATM is an AMD a6-3500, 2 sticks of ram, 1 SSD and 1 2.5 inch HDD so pretty bare bones. Am I likely to get away with this?

StarShock · 21 Jun 2019 at 15:43

I wouldn't. A spec like that would likely peak around 350w, and really you want headroom. I also really don't trust those adapters. Might have to look at getting a beefier power supply. Not ideal as you probably don't want to throw money at it

EsaT · 21 Jun 2019 at 16:49

RX570 can spike over 200W, while PSU has only 250W in 12V.
https://www.tomshardware.com/reviews/amd-radeon-rx-570-4gb,5028-15.html

Also that PSU wasn't any quality PSU even as new but pretty much cheap PSU.
After all these years it has no doubt degraded and would be spewing out of specs ripple.
Further such low end platform and group regulated design would be bad news for voltage regulation in such 12V heavy loads that graphics card could create.

Gentwee · 21 Jun 2019 at 17:45

Thanks for the feedback, it's was more of a long shot.

LuckyBenski · 21 Jun 2019 at 18:51

As a general rule, only use the connectors your PSU has. They're specced up to deliver, well, exactly what the plugs on the end are specced for.