1. Is the pci-express connector the 6 pin one?
2. Are they required to use a pci-express GC (ie need a PSU with it or my computer wouldnt go?
3. If no to question 3, what is the need for it and is it much of a performance difference?
Almost definitely upgrading to (when i get new PSU);
XFX Geforce 6800GS 256mb XXX edition
To go with my;
AMD 3200 64 bit CPU
2GB (4x 512) GeiL PC3200 Dual Channel DDR (with the blue heatspreaders)
Seagate 120GB 7200RPM
Seagate 80GB 7200RPM
Coolermaster Wavemaster Blue Edition Case
LG DVD Burner
Pioneer DVD ROM
Netgear pci wireless card
Samsung 172X LCD
The one thing that fishmahn didn't mention is the fact that GPU come with, or you can buy separately, a converter to change 2 standard 4-pin molex power connectors to the 6-pin PCIe one. If you're planning a new PSU, aim to get one with the connector already on (or even 2 if you want SLI), but it's not the end of the world if you don't have one.