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- Re: two GPU P4000 and K6000 on Z840 1125W
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09-28-2019 02:13 PM
I've searched across the forum but couldnt find reply on the following question:
i would like to use two GPU, one is 160W with 6-pin connector and second one is 235W with 2x6-pin connectors.
I have only 2x6-pin connectors, what adapter\partno do i need in order to run two GPUs?Can i use a sort of splitter?
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Accepted Solutions
09-29-2019 06:14 AM
the z840 like the z820 with the 1275 watt upgraded supply should have 3 six pin gpu power connectors, so no adapters/splitters should be needed for your stated configuration
the stock 850 watt supply only has two six pin gpu connectors (GPU-1) if you have this supply you can not run your listed two video cards!!!
two gpu connectors are on GPU-1 rail
one gpu connector is on GPU-2 rail
normally you want the card with the two six pin connectors to be using a connector from each GPU rail (1 and 2)
this splits the load so each power rail is supplying only 115 watts, but since you will be using two video cards
placing the 235 watt card on GPU-1 using both 6 pin connectors and the 160 watt card on GPU-2 is preferred in this case as gpu- is now 235 watts max, and gpu-2 is 160 watts max
note both gpu rails will be using just under 400 watts total,...... which is pushing the system to what HP specs as a safe wattage
09-29-2019 06:14 AM
the z840 like the z820 with the 1275 watt upgraded supply should have 3 six pin gpu power connectors, so no adapters/splitters should be needed for your stated configuration
the stock 850 watt supply only has two six pin gpu connectors (GPU-1) if you have this supply you can not run your listed two video cards!!!
two gpu connectors are on GPU-1 rail
one gpu connector is on GPU-2 rail
normally you want the card with the two six pin connectors to be using a connector from each GPU rail (1 and 2)
this splits the load so each power rail is supplying only 115 watts, but since you will be using two video cards
placing the 235 watt card on GPU-1 using both 6 pin connectors and the 160 watt card on GPU-2 is preferred in this case as gpu- is now 235 watts max, and gpu-2 is 160 watts max
note both gpu rails will be using just under 400 watts total,...... which is pushing the system to what HP specs as a safe wattage
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