Originally posted by Rawr
Compact cards aren't designed to be overclocked. The reason you see GPUs with large coolers is for overclocking. Better cooling allows for better clock speeds. If you were to buy a GTX 970 with a cooler that uses a 3-fan design versus a compact GTX 970 that uses a 1-fan deisng, but kept both of them at their stock speeds, they'd perform the same. But if you start overclocking, the GTX 970 with the 3-fan cooler will be able to overclock much further than the 1-fan cooler which will allow for better FPS performance. Most GPUs that use a single fan design aren't designed to be overclocked. While you could get a minor overclock with the single fan cooler, don't expect any major improvements in games compared to the stock speeds.
You'll need to purchase a wifi adapter.
Could you also list what parts you are buying? I see you have purchased a Z97 motherboard. What CPU are you buying? Depending on which CPU you bought, the motherboard could've been a pointless purchase. That's a large price jump over the motherboard me and Toke have recommended. Since you've spent more on the motherboard, you must've cheaped out on something else unless you extended your budget. I gave a specific list of parts for a reason. I took your ~£600 budget and worked with it to design a build that would utilize every single dollar to provide the best bang for your buck. If you extended your budget, you should've said something so that I could fix the partlist I put together.