Question about how much power to give a powered riser

[coinbeast]

Hi everyone,

I bought these risers,

http://holybitcoin.com/product/pci-e-1x-16x-6-pin-powered-usb-riser-card/

I want to know if I can power them with these, but only using one of the two 4 pin molex's.

http://www.ebay.com.au/itm/Dual-4-Pin-Molex-to-6-Pin-PCI-E-Graphic-Card-Power-Adaptor-Cable-/172409234482?hash=item2824642432:g:LesAAOSwrklVMOKz

In hindsight I should have bought the 4 pin molex risers instead of these 6 pin ones. 6 pins seems a bit overkill to me.

[Intristing]

One 4pin molex should be enough to power one PCIE slot. But you cannot connect more than two from a single cable.

[sigb0y]

I have connect two Molex Risers from one cable with my PSU. It works.

[coinbeast]

Thanks, I ended up making some cables that split one pcie into 3 pcie so I can power 3 risers from one pcie plugged into the PSU (EVGA 1200w)

[Intristing]

I have connect two Molex Risers from one cable with my PSU. It works.

For the old cards like R9 390 or R9280x, you can connect more than two.