4 pin fan pinout download free12/29/2023 HP fans are designed to run very fast if they receive 12VDC and no PWM braking. Example, and why I tried and gave up on the idea: Noctua fans are designed to run relatively slow to begin with. Replacing one set with Noctua will imbalance your system. Now, why even do this? I very much like the Noctua hardware but the problem with your idea is that HP has carefully balanced all of the fans together. Two wires out of the 8 total are bonded half way towards the plug end, and you just need to dissect a set to figure out which wires they combined. HP PWM 4-wire fan pinout is always ground, 12vdc, rpm sense, pwm control for pins1 to 4, and there may be a ground jumper from pin 1 to pin 5 to tell the motherboard the fan is part of a "Performance" heatsink/fan.Įach of the bonded pair of fans for the rear exhaust kit has its own 4 wire output, but they end up leading to a single white 6-pin plug end. Note the Delta draws more amps and thus might run faster and louder. so if you look up the manufacturer's code on the fan you can find other HP fans that use the same code as a single 4-wire fan. HP has used the same fans with different part numbers. There is either a set of two Delta or two Nidec fans that make that kit up when combined with the black plastic dual fan holder (which will have its own part number embossed on its surface). Looling on eBay for "Z820 rear case fans" shows that the dual rear case fan system HP has designed for the Z620/Z820 is comprised of two 4-wire PWM controlled 92x92x25mm fans with fan number 644315-001. Business PCs, Workstations and Point of Sale Systems.Printer Wireless, Networking & Internet.DesignJet, Large Format Printers & Digital Press.Printing Errors or Lights & Stuck Print Jobs.Notebook Hardware and Upgrade Questions.
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