Question No display output - is that because of under-powered PSU or a graphics card problem ?

[idkman4939]

Hello,
I have a AMD R9 270x graphics card laying around. I have a 350W PSU and when I entered my computer's specs (including the R9) into the OuterVision PSU calculator, it said 348W (which I understand is not enough - I'm planning on buying probably a 500W PSU).

I decided to install the graphics card and try to run the computer for a few seconds to see if the graphics card even works - it did turn on, the graphics card lighted up blue and started spinning one fan, but I'm getting no display output to the monitor (HDMI - I don't have anything else currently).

My question is if this is likely to be a problem caused by the under-powered PSU, or if it could be indicative of some different problem with the R9? I heard that when using an under-powered PSU, the computer will run but it will be very unstable under pressure, so I'd like to know if no display output is one of the possible symptoms as well, or if the graphics card could have a problem.

Thanks very much in advance!

 

[Phillip Corcoran]

It's most likely insufficient power.

A quality PSU of at least 500w is required for an R9 270X

Is an R9 270x compatible with a 430w psu?

I have a 430w PSU and i plan on upgrading my graphics card to a Sapphire R9 270x. I dont plan on overclocking my gpu but i do plan on overclocking my cpu. I just wanted to know if an overclocked Athlon 760k and R9 270x will run on a 430w power supply?

forums.tomshardware.com

 

[idkman4939]

Thank you very much Phillip, I appreciate your help! I will buy a 550W PSU just to be safe, it's only a few € more. Thanks again and have a beautiful day!