Hello,i want to buy xfx-hd5770 850m ddr5,but my motherboard is dg31pr. does my motherboard supprots this card?
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You should be fine.
As for as your motherboard is having a PCI-Express X16 slot.You can install any card in it and it will work just fine.Considering that your Psu can deliver the required power to Gpu and your other components won't be a bottleneck in your RIG.