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Graphics Cards

Journeyman III

RX 580 and PCIe 2.0 x16 (x4 mode)


I was wondering should this work - RX 580 card in a secondary PCIe slot (PCIe 2.0 x16 (x4 mode))? Motherboard is Asus Z97M-Plus, which has two PCIe slots - 3.0/2.0 16x (16x mode) and 2.0 16x (4x mode).

Why I'm asking this - motherboard has PCIe 3.0 slot and there my RX 580 works just fine - but I want to change graphics cards cooler to aftermarket one, and this takes lots of room, and I have sound card in PCI slot.

I did put the card into that PCIe 2.0 slot yesterday, to see what happens, and I started having flickering and moments of black screen. It did not freeze, but it was unusable when game was running.

So, as I have understand, it should work, but with slight performance penalty, but in my case I saw flickering and black screens.

PSU should be enough, 1000 w Chieftec. 

Any thoughts appreciated.


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