I seem to have hit a brick wall while building a gaming computer to compete with the upcoming MMO's. I decided that the GTX 560 Ti NVIDIA was a great choice of card to use for the budget I had, but there is alot of debait on the internet on the power supply required to run it. People say that it can be run on a good 450W and others say you need a 700W. Nvidia also stated you need a 500W. According to PCspecialist, a 450W is compatable with the card, but now I'm afraid it may be too risky. Does anyone use this card or have any opinions on the subject? I'm trying to keep it as under budget as possible (£700) because I also have College this year. If I choose to go with a higher end power supply, I will have to downgrade the Cpu to an Intel Celeron dual-core G530 is that risky?