I have an AMD Phenom CPU and it SAY to USE a CPU Fan with a speed of 4800 RPMs But I got a Fan that has a speed of 2800 RPMs
And the Fan does have a heat Sink will I be ok or is this not ok to use with the CPU it will go ontop of it?That depends on what size of fan it wants at 4800 RPM. a LARGER fan would move more air- in order to run it at 2800RPM safely, you would need a fan at least a LITTLE less then twice the size of the stock fan.