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7900GT eVGA

C

Cygnus X1

Senior member
I plugged the card in then plugged the power extension with 1 square 4 pin molex into the back of the card. On the other end is 2 count 2, 4 - pin molex power connectors. I plugged power into each of them. Is this right? The eVGA manual left something to be desired.
 
The card should only have 1 4 pin PCIe (note I said PCIe) power connector if it's PCIe, which it is. Thats NOT molex (afaik).

Just plug the card in the slot, then plug in the 4 pin PCIe power, then plug in monitor and you should be good to go. Then do all the other normal stuff, update drivers, etc.

And in the end, profit 😛
 
What the...I thought the new 7 series cards don't have power connectors

EDIT: Nevermind, only the 7600GT doesn't have one.
 
The PCIe power adapter needs two molex connectors plugged into it. Of course if your PSU has a PCIe power connector on it, use that.
 
i thought they had 6-pin PCI-E connectors, though I did see a card with 2 molex connectors. Can't remember what it was.
 
Originally posted by: MDE
The PCIe power adapter needs two molex connectors plugged into it. Of course if your PSU has a PCIe power connector on it, use that.
Click to expand...

Ok so I did it right. I wish it would spell it out in the manual. This must be very power hungry for 2 power connectors. I thought it was supposed to take less power. Anyway I have enough connectors it's just weird. This is my first pci-e card. I'm a pci-e virgin.
 
Originally posted by: Fraggable
i thought they had 6-pin PCI-E connectors, though I did see a card with 2 molex connectors. Can't remember what it was.
Click to expand...

He's talking about the Y cable that converts two 4-pin molex plugs into a single 6-pin PCIe power connector, not the card itself. The only dual molex card I know of offhand is the AGP 6800 Ultra, which pre-dates the 6-pin plug.
 
oh....now i see what he's saying.

you only need to connect one end of the 4 pin molex

the dual 4 pin molex design allows you to use it for additional components instead of only "wasting" it on the video card
however, i'd recommend leaving the second 4 pin molex alone since you want as much power dedicating to the video card as possible
 
Yes Cygnus, you have done it correctly. You use 2 of the 4-pin Molex connectors due to the high power draw of the card.

A newer power supply will have 6-pin PCI-E Molex power connectors made for the purpose.

Molex is a company, all of these type connectors are generally referred to as Molex connectors, even if Molex didn't make them, because Molex created the type.

The main power connector on the mobo is also a "Molex" connector, btw.
 
the 4pin power connector, that you used to use for HDs, and still use for CD roms and some fans is a molex (2 black wires in the middle as ground, 1 red for 5v,1 yellow for 12v) is a Molex connector...yeah, OP was talking about the PCI-e to 4pin molex Y cable...the connector for the mobo (20 pin or 24 pin) is the ATX connector...

Oh - and Op: 7900 GT? NICE!
 
The ATX connector is a Molex connector too, as I already explained.

Molex is a type of connector, named after the company, not a specific connector.

A Molex connector can have just about any number of pins, actually.


 
Actually, I have the EVGA 7900GT Superclock and my PSU does have the 6 pin PCIe connector. However, when I connected this to my 7900GT, the graphics card would not display anything. Just a blank screen. The system would boot fine because I could hear normal system beeps and hard drive access. I went back in the case and used the Y power adapter that came with the card and hooked it up to the PSU using 2 of those 4 pin Molex connectors (Initially, I used two Molex connectors on the same wire from the PSU). The 7900GT finally displayed the boot screen and windows. However, the card was'nt stable. Windows would freeze after a few minutes. I then opened the case again and split the Y adapter up from using two 4 pin Molex plugs on the same wire from the PSU, to using one 4 pin Molex on two different wires from the PSU. This setup finally seems like it is working as I have a more stable system now. Has anyone else encountered this? This is my first PCIe graphics card. I have a 400watt Coolmax PSU, 2 400gig WD harddrives in RAID 1, Athlon 64 X2, 4200+ @ stock speed.
 
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