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1  Alternate cryptocurrencies / Mining (Altcoins) / Strange behavior from an older motherboard on: July 21, 2017, 05:31:51 PM
I've had 2 rx470's mining in my old 965P-DS4 for quite a while now. Since one of my other motherboards crapped out and is now in warranty, I needed to move its 580's into other rigs. This motherboard is acting strange though.

Basically, it has 5 pcie slots total - 2 of them are 16x and 3 of them are 1x. It has no problems with any video card/riser combo as long as I'm either using the 16x slots exclusively or the 1x slots exclusively, I can't use all of them at the same time. Essentially, as soon as anything is plugged into the 16x slots, the 1x slots stop identifying video cards.

I can plug other stuff in the 1x slots and have them identified, it had no problem running 2 video cards in 16x slots, a wifi card, usb 3.0 card and a sound card in the 1x slots at the same time.

When I switch it up and fill the 1x slots with video cards though, if there is anything in the 16x slots (not just video cards), it won't even boot.

Looking around the BIOS, the only thing associated with PCI-e is its frequency, I can overclock it but I left it on default. Also should mention that the board only supports PCI-e 1.0 and is running the latest bios update.

The type of risers I'm using are the externally powered USB ones, version 006S and are perfectly functional as far as I can tell. I'm testing with a corsair ax1200i so power isn't an issue either.

Anybody else experience something like this?
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