Harry P-W
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On average and for the games he plays 2x 280x performs 20% better, and the cost also depends on the brand he choses (2x£180 vs £360). As for upgrades, that's not so much of a concern (It'll be a few years, and at that point we would use them to replace the 270X in the casual/ media PC and it would have enough power to do so without getting a new PSU. It's what what we always do, at one point we even had a Nvidia and an AMD GPU inside it, hooked up to seperate screens of course).
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2x R9 280X is cheaper than a single R9 290X and has better performance. The GTX 980 probably has the same or more performance, but is even more expensive.
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Awesome, thanks! I know, I said that was fine.
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Hiya, my friend is looking to do some PC upgrades but I'm worried that what he wants to do might not work very well. My main concern is his Crossfire set up. His CPU supports 16 PCIe lanes, and his motherboard has 2 x PCIe 3.0/2.0 x16 (x16 or dual x8), 1 x PCIe 2.0 x16 (x4 mode, black), and 3 x PCIe x1. He is looking to install 2 GPU's and 1 wireless card, so my question is, will the GPU's run at PCIe 3.0 x8/x4 (which is fine), or something else? Also, will it do so automatically, or will it disable the wireless card and run in PCIe 3.0 x8/x8 (which he will then have to edit in the bios)? For Reference: CPU: I7 4770 (in current PC) Mobo: Sabertooth Z87 (looking to buy) GPU: 2x R9 280x (looking to buy)