Brilliance or insanity?
Cooling two Xeon 6146 Gold processors in a Dell Poweredge R640 for use as a FEA/CFD analysis machine.
I 3D printed adapters that clamped onto the 'barbs' of the radiator, and then clamped onto those adapters the final adapter with the 3/8" barbs pressing an o-ring up to the face of the radiator 'barbs.' The inlet adapter printed nicely and the print was internally sealed. The outlet though was a different story and I ended up using polyurethane to seal the wetted faces.
The 3D adapters were a pain getting the o-ring to seal. Turned out to be a design mistake and the o-rings were being squeezed inward and not outward. Had to 3D print a adapter open in the middle to see the issue. After that, they sealed up fine against the radiator. Next came trying to seal the NPT fittings. Even with the tap to clean up the printed threads, and multiple layers of sealing tap, they would still leak ever so slightly. Ended up gluing them in to solve the issue.
There are no power connectors inside the server to use to power the pumps, so I ended up getting a 12V power supply and adapting that to a 4-pin molex connector, then to two molex to fan connectors.
At idle, including the monitor, it is drawing ~170W of power as measured at the outlet.
At full tilt ~590W
Max temps are 58C and 61C as reported by HWMonitor
Radiator ~$30 off of Amazon
Topsflo Cooling Pump x2 ~$50
Bitspower CPU block x2 ~$98
3/8" Tubing ~$10
3/8" barb to 3/8" NPT ~$6
3/8" NPT tap ~$6 (to clean threads on 3D printed adapters)
12V Power supply ~$13
Box Fan ~$10 off of Facebook Marketplace
Universal SAE O-ring kit ~$16
G1/4" to 3/8" Barb ~$13
Roll of PLA ~$13 (though only used a fraction of it printing and testing the adapters)
Total: $388
Is it in its final form? Not really.... I will at some point try to figure out how I can mount the radiator horizontally and see if I can get away with passive cooling.