290X pci-e cable power supply question

[tommybhoy]

Trying to make a hybrid 290X/670 system in order to run Physx/Gameworks via the 670 and mantle/TA through the 290X, but Nvidia disable PhysX through the 670 if an AMD card is present.

Don't want to remove/install the 290X from the mb each time I want to play a title through the 290X, thought about disconnecting my pci-e extension cables.

Is it possible to leave the 290X fitted in the pci-e lane without power(pci-e cables disconnected) or will it damage the gpu?

 

[wazza300]

pitty you couldn't solder in an inline switch into the pcie power cable

cant see it damaging anything,idk if the mb would detect it being on or off though?

 

[tommybhoy]

Yeah, might not work regardless in relation to the mb still detecting it, just looking for the easiest solution to the problem.

 

[zx128k]

This is not a good idea, do not solder an inline switch to the pci-e power cable as the graphic card will then be powered only from the PCI-e port.

 

[tommybhoy]

Not going to solder anything bud.

I don't think the card comes on as such without the pci-e cables, iirc a red warning led activates without the pci-e power cables attached(forgot to plug power in once).