I just ordered and installed a refurbished Sapphire R9 280x Toxic in my PC today, and I'm having some issues. The Toxic has two 8-pin connectors, and I hooked up my power supply to both. I hooked up all my other cables up to my setup, including the HDMI of course. The GPU was obviously getting power, because the light on the card (visible from outside) was on. However, after sitting there for a few moments, the screen was still black, and remained so for the next 5 minutes it was plugged in. My monitor simply said "No signal" when the HDMI was secured in the port. So obviously I was confused, and I unplugged everything to check if everything on the inside was looking correct. After poking around for awhile, everything seemed to be in place, so I went back and plugged in only the power cord and the HDMI, and turned it on. This time however, it began to beep and blink in sync. I assumed that was a bad thing, so I just turned it off. At this point I don't want to try much of anything with it, for I fear that I could mess something up. So if anyone has any ideas of what may work, please go ahead and reply.
Thanks in advance!
Thanks in advance!