GPU not working (external test)??

im building my first computer, and i just tested it externally with cpu, ram, and gpu installed.

Everything went fine EXCEPT my GPU fans arent spining, and the HDMI coming out of the GPU isnt detected by my monitor.
I plugged in one PCI E.

my onboard graphics work fine.

This is the GPU:

Please help :)
(and soon bc its 1am and my build isn't done yet lol)
3 answers Last reply
More about working external test
  1. whats the rest of the build.
  2. Just reseated and inserted both PCI E cables and it works.

    I guess I'm supposed to have both PCI E's connected??
  3. yes, gpus are built so that you have to have all pci-e connections normally. they need it to have extra watts to be brought to the card.
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