Has anyone tried putting a Inno3D nVidia GeForce RTX 3080 Ti X3 OC 12GB into a HP Z840 ?

I want to put this in my HP Z840, it's a dual slot version based on Nvidia's Founder's Edition, can anyone offer any advice whether the 1125w power supply will be enough ? The GPU requires an 8+8 pin power cable so any help finding resilient 6 pin to 8 pin power adapters would be appreciated. Here's the GPU : https://microdream.co.uk/inno3d-nvidia-geforce-rtx-3080-ti-x3-oc-12gb-gddr6x-gaming-graphics-card.html

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  • Not sure if this is much help but i run a GIGABYTE RTX 3060 Ti GAMING OC PRO it requires a 6+8 Pin setup. I have the 1125w and run dual cpus with no problem with overheating throttling or anything. I use 2 of the 6 pin connections to a 8 pin adapter, and the 3rd 6pin for my GPU. Im sure you could use a dual 6pin to 8pin and on single 6 pin to 8pin. I used to use that setup with a 750w psu with no issues. hope this helps. 

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  • 6 pins are rated for 75 watts. 8 pins are rated for 150 watts. You have a 75watt pcie slot. A 3080ti draws up to 350 watts. So with 2 REAL 8 pin connectors and your slot that puts it at 375 watt so 25 watts of over head. Using 3 6 pins to make up 2 8 pins with a 75 watt pcie slot give you 300 watts which is 50 less than what is required.  A 3060 ti draws up to 200 watts. The ratings get me a little by double output for 2 additional pins but that's what's listed.

  • I actually take some of that back. The 6 pins in the z840 are rated much higher than normal. You can use just 2 6 pin connectors for that GPU. Hp does sell a high amperage cable adapter to go from 6 to 8 pins  part number N1G35AA. I'd really recommend using 2 of those and not skimping on anything using that card. Really wouldn't want to see melted components.

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