Not enough 6 pin PCI-e for Crossfire

[arataka]

I currently have a Corsair GS700 powering my rig with a single HD 6870. I plan to add a second one now for crossfire considering the recent drop in prices. Due to earlier planning I checked that the wattage is enough to support the crossfire setup but I overlooked the issue with cables.

The GS700 comes with 2 PCI-e 6+2 pin cables which is just sufficient for a single HD6870. It doesnt have the 4 cables required to power 2xHD6870.

However, I have 5 number of spare 4-pin cables. I know two numbers of 4 pin can be converted to one 6 pin. I just want to check if converting the 4-pins is the right way to power my second HD6870 or if I will actually need to replace my power supply.

Can anyone guide me with this setup?

Thanks in advance

P/S not sure if this belongs to the graphic card forum or psu forum. sorry if i posted it in the wrong location.

 

[sl4y3r]

I too have a 6870 CF setup.I have a Cooler Master GX 650 that has 2 6pin connectors just like your PSU. I power the 2nd card with the 4pin to 6pin pci-e adaptor. Works just fine, your current PSU is good to go.