Nope, a new heatsink will not make more noise. Not sure if you changed the fan, but that'll likely make your unit be whisper quiet. 

Maybe in the future for fun. Does it make more noise?

Currently the stock one is keeping it at ~55° C at ~60% which is pretty nice.

m0wer

That's pretty damn good for a stock heat sink! On my units, I've noticed a considerable temperature drop when I upgrade the heatsink. The fan upgrade is more of a noise thing, IMO. All that's to say is you could be even more impressed with performance if you did upgrade that heatsink, but I sense you don't want to. :)

bitcoin_Mining

Bitaxe Gamma 601 hitting 2 th/s?

metadavid

That's pretty damn good for a stock heat sink! On my units, I've noticed a considerable temperature drop when I upgrade the heatsink. The fan upgrade is more of a noise thing, IMO. All that's to say is you could be even more impressed with performance if you did upgrade that heatsink, but I sense you don't want to. :) 