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April 05, 2014, 06:32:43 PM |
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Hey guys, I've got an Asrock H81 Pro BTC and am trying to run 4 R9 280x all powered off of a Silverstone 1500 watt PSU. I'm using powered USB 3.0 x1 to x16 risers. I can get one card recognized, but none of the other cards work. This is with the risers being powered and the onboard 2x molex connectors disconnected. I unplugged all of the power to the risers, and plugged in both molex connectors on the mobo. When doing this I found that that the gpu fans won't spin up at all. Do I need to have the risers powered as well as the 2x molex's plugged in on the motherboard? Any help would be awesome!
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