What would you recommend for a graphic card for a system that doesn't have a connector for a supplemental power connector. The system is a Dell Optiplex GX745 minitower. There is only a single-wide slot and no connector (for either a 6-pin PCI-e or 4-pin hard drive) from the power supply.
The power supply probably is rated at around 300Watts.
Also, I need to drive a single 2650 x 1600 30" monitor. I'd like to get the card with the best performance that this machine will drive.
(I'm kind of bummed that I can't use a high performance card in this machine, but we're restricted to the Dell Optiplex line at work.)