How to install a second GTX980 graphic card to Hp640z workstation

[Erogol]

I have one GTX980 installed already to my Hp640z and I want to place the second one. However I cannot see any auxiliary pci power cable to en power the second GPU. How can I place this new one to that machine? Any help?

 

[Petrossa]

As far as can be determined, the PSU in your system has 2 PCIe power connectors, though it is not clear what they are, though one can speculate that they are either 2 x 8-pin of 1 x 8-pin and 1 x 6-pin (judging by the upgrade options officially on offer).
You'd have to swop out your PSU if you need more, rather than use Molex-PCIe connectors.

 

[Erogol]

I can only see two pci power connectors. One 8pin and one 6pin but motherboard has two pci3 ports supporting 2 GPUs then. So I suppose there should be a solution for two GPUs other than changing psu

 

[sizzling]

I very much doubt a motherboard used by HP will support Sli. Are you sure your motherboard supports it?

 

[Petrossa]

According to the reading material, no SLI support.

 

[Erogol]

Then the only solution is changing the psu?

 

[Petrossa]

Correct