can a gtx 780 or gtx 590 be installed in dell t7400 or hp xw8600?
More aboutgtx 780 gtx 590
gtx 780 is faster than gtx 590 .gtx 780 needs one 8 pin and one 6 pin power connectors and draws up to 250W . Check if your PSU have them . dell t7400 have 980W psu , so it may handle the needed watts for gtx 780 .Dell t7400 has 2 pci-e x16 Gen 2 which is ok. The same is the situiation with HP XW8600 Workstation has 2 pci-e x16 Gen 2 slots and 800/1050W psu . check for the needed pin connectors.