i just noticed that the store also has refurbished GeForce GTX560Ti (which is way better) on sale for the same price. it recommends a 500 psu, but i currently only have a 460w psu that came with my dell xps 8300. So i'm curious would i have to buy a new psu to use the card or could i slide by with the 460w psu?
I would be safe and use a 500W PSU. That's because your computer may not be running at full load all the time, but if it runs at full load and your PSU cant handle it X(
560TI, but second hand...Just be sure what you're paying for. Make sure its not some GPU that's been thrashed. I'd say stick with a 7770/90 so your not that out of your budget but you will still have a guarantee that your're cards lifespan is not already half over.