Just take your fan off your current HP ZX20 heatsink and switch it over to the ZX40 one noted. The fan and the fan plug wiring for HP workstation heatsinks is key. They fit perfectly under the memory fans shroud on the Z620 workstations if you have one of those. These bigger heatsinks have 4 instead of 3 heat tubes, and almost twice the fin surface area. The processors are not cross compatible but the heatsinks are. The ZX40 larger heatsink fits perfectly atop the ZX20 sockets. Here is the solution I developed and posted about in here (with nice pictures). What would be required by either solution 1) or 2)? Is it possible to do either one or the other solution on the stock Z420 motherboard? There could be some issues in fitting the radiator, but since I don' t care about aesthetics I 'll figure out some way.Ģ) I thought about an external fan controller, but not much is being said on this. I know I could set Fan Idle Mode to "6" (temperatures won' t go over 65☌), but this implies:ī) I have to restart the PC before and after every simulation (which is pretty annoying) Ĭ) All fans are sped up, while I'd just want the CPU fan to work some more.ġ) I thought about replacing the OEM heatsink with a liquid AIO system, possibly with PWM fan control, and I was thinking of Corsair ones (H80i, H100 GTX/v2 or H110i) which come with factory software for fan speed controlling. Still, I would like to keep it under 60☌ under load for reliability, since I' m going to run CFD simulations and CPU is going to be at 100% for hours. I read on other threads this is pretty normal and Xeons (E5-2680 in particular) can withstand easily that temperature also my cooling system works very good as, when I stop the stress-testing, temperatures drop to 65☌ within 1-2 seconds and in about 10 seconds it gets almost to 40☌.
This is with BIOS>Power>Thermal>Fan Idle Mode set to "0".
I 've got a refurbished Z420 v1 (Boot Block Date ) and I noticed that, stress-testing with CPU-Z, CPU fan won' t speed up until 80☌ are hit, as to HWMonitor readings. Some threads treated this subject (such as ), but I didn' t find them very helpful. After lots of researching in this forum, in the "Maintenance and Service Guide" and in the Internet, I thought it was time to ask here.
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