Ok, as you'll see from my extensive number of 'Post', total newb question. Got my first rig up and running...
Specs:
Gigabyte R9 290 GPUs
GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Seasonic X-1250 ATX 12V 24PIN 1250W Active PFC 80PLUS Gold Modular
I ordered these risers:
http://www.ebay.com/itm/Powered-Riser-PCI-E-Express1X-to-1-16X-molex-Bitcoin-Litecoin-Mining-/171205234589?ssPageName=ADME:L:OC:US:3160(Powered Riser PCI-E Express1X to 1/16X + molex)
Put the first GPU on the mobo and got it up and running. Tonight I tried to add a second GPU with the above riser. When I go to power on the PSU it 'trips' and provides no power. I 'think' I have the connections correct but I'm wondering if I bought the wrong riser? In the meantime I stuck the 2nd GPU on my board just get up and running.
I read that the 1/16 riser is compatible for all cards?
I've also read several comments such as, you can't mix GPUs on a riser with a GPU on the mobo. <- is that true?
I have either those same risers or ones that look identical. When you say you think you have it hooked up correctly, how do you have it hooked up? Are you plugging power into the riser? Have you tried swapping the riser for another one to see if it's bad? You have a quality power supply with a single 12V rail, so that shouldn't be the problem. The 2nd GPU works fine in another computer?
Yes, a PCIe 1x to 16x riser will work with all cards.
You can put a GPU on a riser connected to a motherboard that has another GPU plugged directly into it. I've done this numerous times before and I don't know of any technical reason why it wouldn't work.
