Originally Posted by wmandra
the N20 Z4 uses the same 600W fan as the N54, so I would think the 850W fan from the 335is would a decent upgrade. Don't know about the N54, but on the N20 the JB4 has a "Max Cooling" mode which essentially runs the water pump and fan at full power all the time.
That's good news. I've tried to source one on eBay before, but no luck. Would love to pick one up if it wasn't too expensive.