£50 a year on power, and fan noise, Don't make me laugh lol, utter none user Crap.
Stop reading reveiws and try hardware, it's the future.
Fan noise is important to some users, for me its really important as I like a quiet system. I would happily sacrifice 2% of performance for it.
Do you need to answer like if you were a 4 year old boy?
I currently have a 460GTX and are far removed from being a fanboy, just buy whatever is best in terms of value for money.
Seems that I got my facts slightly wrong though regarding energy usage (did it of the top of my head! hehehe, not reliable!)
Lets say he uses the computer 3 hours a day and that on average, if the card uses 50W on load more than the 6870 (and that is assuming the card is at stock) he will spend around
£12 more a year, so yes, I got it wrong, but it is still worth mentioning I reckon. I don't know who pays the electricity in your case but in mine its my job wages!
Also, if he wants to do CrossFire, the cards scale very well and you won't need a mammoth PSU to run them both.
Plus driver improvements are probably going to affect more the new series of ATI cards instead as we have had a few good drivers for the nVidia series now.
Worth saying too is that the cheapest 470 is £188 and the cheapest 6870 is £176.