I have a copper coolermaster heatsink and fan which is the one that is desighned for overclocking this had a 6800 rpm 60mm fan on it it was noisy although after a while you get used to it, but i bought an akasa 60mm to 80mm adaptor. Unscrewed old fan fitted this and a ystech 80mm 3000rpm fan which seems to run at 3400 rpm this is more eficient and a bit quiter of course its a bit difrent with a slot 1 amd cpu i would try a bigger fan if posible not sure what other options for slot one most place sell socket a now.
i just found these heatsinks and fans for slot a, might be better than what you have
overclockingstore
