Power Supply and Hookup for Sapphire Radeon R9 290

[UnPocoLoco73]

I just purchased a Sapphire Radeon R9 290. I currently have a Radeon 7850 which works fine. When I install the R9 and hook up the power, the fans turn on, but it will not display any output. I have a Seasonic 650W Gold PSU (which my several posts, should be enough even though it calls for a 750W). Am I not connecting the power correctly or something?

My processor is an AMD A8 5600K on a Gigabyte GA-F2A85X-UP4 Mobo.

 

[todd1780]

The R9 290 requires a 6-pin and an 8-pin PCI connector. Do you have both of them plugged in?

 

[UnPocoLoco73]

The R9 290 requires a 6-pin and an 8-pin PCI connector. Do you have both of them plugged in?

Yes. I have tried two ways. One using the PCI-E 12 Pin to 8 pin (two cables to power off of one 12 pin--which splits and can connect to both. And then both separate.

 

[todd1780]

659 watt seems like an odd number. Was that a typo?

 

[UnPocoLoco73]

659 watt seems like an odd number. Was that a typo?

Oops, yes. 650W

 

[todd1780]

If your 100 watts shy of the recommended power, its possible that your PSU isn't strong enough to drive that card.