Re: Power consumption GTS 250 versus GTX 240/260/275 with the Linux drivers?
The GTS 250 is (sadly) only a relabeled 9800 GT and sports pretty high overall power consumption and doesn't have good power management. These are hardware properties not affected by the driver.
The GT 240 is a good option if you need low power consumption, especially low idle power consumption (< 10W). It'll be a bit slower than a GTS 250, obviously.