3 ideas for holding the heatsink on there, of which I've used all 3 in the past
cheapest - 2 heavy duty rubber bands
midlevel - buy some high temperature nonconductive glue (not expensive) at a hardware store and mix it with thermal paste and glue it on. let it dry for a day or so
money - Buy aftermarket cooler, accelero S1 works well and if you can find it, usually only like $20
I will say though that 4870 is one of the hottest running cards out there, second only to the dual 4870 on 1 card which can heat your house
cheapest - 2 heavy duty rubber bands
midlevel - buy some high temperature nonconductive glue (not expensive) at a hardware store and mix it with thermal paste and glue it on. let it dry for a day or so
money - Buy aftermarket cooler, accelero S1 works well and if you can find it, usually only like $20
I will say though that 4870 is one of the hottest running cards out there, second only to the dual 4870 on 1 card which can heat your house