GPU PCIe cables - Do I need to use the molex-pcie?

[Leprekaun]

Hello all. This is just a general question that I don't think really matters that much but I would just like to make sure. With my previous Radeon HD 5850 and my current GTX 660, I've noticed that they both came with molex to PCIe cables for powering the fan of the GPU I assume? Anyway, my PSU also came with PCIe cables so I've powered my GPU using the cables directly from the PSU so is it ok to do that or I should use the molex to PCIe cables? What makes me wonder about it is that the molex to PCIe cables have 2 wires going to pin 2, top row and nothing going in pin 5, bottom row while the PCIe cable coming from the PSU itself has 1 wire going into each pin so that's what got me thinking. I have no electronics knowledge to determine different voltages, types etc. so does it make any difference which cables I use or they're the same? Thanks.

[DIREWOLF75]

I've noticed that they both came with molex to PCIe cables for powering the fan of the GPU I assume?

AFAIK or i misread something you wrote, hardly!

The extra connections are needed because the PCIe slot can not provide enough power to the card.

The molex to PCIe power are there only for if you have a PSU with too few PCIe power cables.

[Hammer_Time]

Dire is absolutely correct. The PCI Express slot ( version 1 or 2 at least ) can only provide max 75 watts to the card, the rest of the power it needs comes from those PCIe power cables from your power supply. It is best to use the native connectors from your psu, as you are doing right now. You only need to use molex 4 pin ---> PCIe 6 pin ( or 8 pin with some very power hungry top of the line cards ) converter cables ( adapters ) if you don't have enough of the proper PCIe power cables coming from your psu. You have it hooked up correctly, nothing to worry about...

[Sauron_Daz]

There is no must in using those adapters.