I'm running an Antec TruePower 550W PSU and I have 2 BFG 7800 GTX's that I want to hook up in SLI. I just had to RMA my motherboard and disconnect everything that I put together a couple years ago (also when I only had 1 7800 GTX). The problem is that I can't remember how I had my graphics card plugged into the PSU. I've got 2 chords coming from my PSU that say PCI-E on them but I seem to remember using the Y-Cable that came with my graphics card. The Y-Cable has 2 molex connectors that go into 1 PCI-E conector. I remember I had a power complication - is it possible that the PCI-E chord coming from my PSU doesn't supply enough current for the card and that is why I needed to hook up TWO molex connectors to it? How would I look up this information? Also, considering that now I want to hook up 2 cards...if I do end up having to use the Y-Cables, that means I'll need to use FOUR molex power connections from my PSU...Is it okay if I hook a bunch together that are on the same wire as the one that goes to my optical drive, for example, or do you not get as much power that way? I don't think I have 4 SEPARATE molex wires coming from my PSU. Any help would be greatly appreciated! Thanks!
post #1 of 18
7/2/07 at 6:14pm