My Z640 has a 925w poer supply but the only 6-pin power plug I find remaining isn't sufficient to power my GTX 1070 video card under heavt use. It requires 2x 8-pin power plugs and the adapter I have installed is not always able to provide enough power. HP chat help wasn't any help. Do I need to install a new power supply that provides 8-pin pci-e power plugs?
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