Welcome to the forums!
I guess you did not take the time to read the requirements of the 6970.
It requires a quality PSU rated at 550watts or better.
I bought a Corsair GS600 to go with the card, which has 600 watts of power. I used the 6970 with the GS600. The 250 watt power supply is the stock PSU that came with my computer.
4pin like 0000 or
if it was
00 that is power for the CPU and it need be plugged in.
It had two rows and two columns. I think that may be the problem, I didn't plug that in. That's really inconvenient though, because there is no 4 pin in easy reach of the plug. I'll try figuring something out, thanks for the suggestion.
Okay, it turns out the 8 pin connector I didn't use splits into two 4 pin connectors after some investigating. I'll try that solution. Thanks again.