I have an 875 Watt power supply its 8 pin power connector isn't right for the card. Rather than the normal (this is gonna sound dumb) []()()()
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I have no idea how "bad" it is but it does not look like high end PSU. Stil might be a decent one.
here what i found
CONNECTORS:
20+4-pin x1 (will support/work with both 20pin & 24pins motherboards)
ATX CPU 4/8 pin (4 Pin+ 4 Pin) X 1
PCI-Express 6 pin X 1
PCI-Express 8 pin (6 Pin + 2 Pin) x 1
SATA X 4
Molex 4 pin X 5
Floppy X 1
So it has the 6+2 = 8 pin connector for your new GPU.