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Adding additional fan to OMEN Obelisk desktop

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HP OMEN OBELISK 875-0014
Microsoft Windows 10 (64-bit)

Looking to add additonal fan to help cooling and there is an LC_PUMP 4 pin socket (currently unused). Im guessing this stands for Liquid Cooling should I add one for the CPU? But for now can i hook up either a 3 pin or 4 pin 120mm fan to it? The product page states that there is an additional mounting spot on the top of the case for a 120mm fan, but doesn't specifiy where to plug in. The System Fan slot is taken by rear fan and CPU fan slot is taken by current CPU fan, leaving just the one mentioned above. The motherboard is Edoras SSID: 84FD. Thanks In addition I noticed there is a fan spot towards the front of the motherboard, but the actual socket isn't there where you would plug in the fan. You can see where it should go but its missing and the capacitor is missing for it as well

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In addition I noticed there is a fan spot towards the front of the motherboard, but the actual socket isn't there where you would plug in the fan. You can see where it should go but its missing and the capacitor is missing for it as well. 

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Did you ever get any kind of answer?

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I haven’t gotten a reply yet. I also asked on twitter and nothing. I’m pretty sure it’s fine. The current fan for the CPU is plugged into LC_system fan and when you get liquid cooler there is a fan pin and the pump pin plus SATA plug. 

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Edit:  Nevermind.  I should have tried google first before asking.  Here is that mention of the 120mm fan.  I'd like to see some info on installing it, as well:

https://store.hp.com/app/tech-takes/hp-omen-obelisk-gaming-desktop

 

I'm leary of liquid cooling, but I hear they have made some great improvements in the form of completely self contained units.  Plumbing in my computer makes me nervous.

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