11-25-2013, 07:06 AM
Melted down the 12V? Wouldn't it stop working all together then?
Its a single 7990 card with a 875w PSU. I assume I want a 1000W but was told 875 was enough power for the card.
To answer your question, about the supplemental power, is most likely no. I have a single PSU that supports the entire system.
This is a n00b answer so I apologize. Other than the pci-e slot and the 2 6+2's connected there is no additional power (the 6+2's are from the same PSU)
So I assume if I get a 1000W I should be ok and if I want to at some point add a second card, 2 1000W should be used? That just seems like an awful lot of power for 2 7990's.
Its a single 7990 card with a 875w PSU. I assume I want a 1000W but was told 875 was enough power for the card.
To answer your question, about the supplemental power, is most likely no. I have a single PSU that supports the entire system.
This is a n00b answer so I apologize. Other than the pci-e slot and the 2 6+2's connected there is no additional power (the 6+2's are from the same PSU)
So I assume if I get a 1000W I should be ok and if I want to at some point add a second card, 2 1000W should be used? That just seems like an awful lot of power for 2 7990's.
(11-25-2013, 06:08 AM)epixoip Wrote: do you have supplemental power supplied to the pci bus?
it sounds like what's happening is your gpu is trying to draw too much power through the pci slot, and either the motherboard is proactively shutting things down, or you've already melted down the 12V on the ATX connector and it's tripping the surge protector in the PSU.
this is actually a fairly common problem with dual-gpu cards, and the solution is to feed supplemental power to the pci bus.