First Build: Computer won't start with graphics card plugged in.

Acclue

Reputable
Aug 21, 2014
5
0
4,510
I'm doing my first build and everything was going alright until I plugged in my GPU, and now it just powers on for a moment and then off again, leaving the power indicator light on the front panel on, but not running any other hardware. Unplugging the GPU lets it start up, but since my motherboard doesn't have any on-board video, it makes the computer unusable.

Plugging only one of the 6-pins into my card allows the computer to power on, but that still won't let it display anything so that really doesn't solve anything.

I've checked all of my connections and everything looks to be secure, so I'm kind of at my wit's end on this one. Need some help from someone more experienced than me.

Relevant Specs:

Mobo: Biostar TA970 ATX AM3+
CPU: AMD FX-6300 3.5 GHz 6-Core with Cooler Master Hyper 212 Evo 82.9 CSM Sleeve Bearing CPU Cooler
PSU: Corsair Builder 600W 80+ Bronze Certified ATX
GPU: Sapphire Radeon R9 270X 4GB Dual-X
HDD: Seagate Barracuda 1TB 3.5" 7200 RPM
 

Acclue

Reputable
Aug 21, 2014
5
0
4,510
Talked with some friends about it and they said that the PSU might not be providing enough power to run everything, but from what I've read, my parts shouldn't be getting anywhere near 600W. Could it be a faulty PSU?