Just replaced the stock cooler on a Sapphire 4870 with the Accelero S1 coupled with a Scythe 800rpm 120mm fan. Very fiddly putting it on but certainly worth it:
Stock idle temp: 68
Stock load temp: 87
S1 idle temp: 44
S1 load temp: 56
And it's now completely inaudible
Stock idle temp: 68
Stock load temp: 87
S1 idle temp: 44
S1 load temp: 56
And it's now completely inaudible
