So in an attempt to quiet down the old z800, I started to replace fans with Noctua fans-- but HP does not use standardized fan connectors. In particular, putting 4 pin PWM fans on the header that is meant for a dual fan setup that terminates into a 6 pin connector. The 6 pin layout is essentially the standard 4 pin layout of hot wires and RPM wires, but the 5th and 6th pin are just for the RPM of the second fan (power is paralleled). So to make the annoying BIOS 'fan not detected' error go away (requiring me to press F1 to complete boot up-- and also to put the provided Noctua resistors in place as the MB makes the fans go into overdrive with this error) I found that Philmore locking socket 70-4856 fits the 'proprietary' HP 6 pin fan header perfectly. I paralleled two wires with pins to the Noctua RPM wires to go into the last two blanks-- boot up-- Error free and no need to use the reistors as well!!! Success!!
Hi there, great post. I have a z800 and have just upgraded the processors to two Xeon x5670's. so I have purchased non genuine heat sinks with 4 pin connectors. I'm having trouble connnecting the 4 pin power to the 5pin board connector. Any ideas ? I'm in the inner west of Sydney.
ReplyDeleteAdd a jumper wire for pin1 to pin5
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