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You can OC the BCLK on the 6600. Might want to spend the extra £25 on a better cooler, something like a Dark Rock Advanced C1 or something. XFire support so you can easily add a 2nd 390 at any point, if you need/want to do so.

Looks a solid build to me + under budget, think i would go with a better cooler, just to be on the safe side, what's the min/max OC do you think i could get if i were to OC ?
Thanks btw .

No idea. Couldn't tell you. Every CPU will be different. You can spend an extra £50 for a 6600k if you want a fully unlocked chip, and a 6600k might OC better than a 6600 would, since it's fully unlocked but honestly, it's better to just save the money and get the 6600 IMO. You can still OC the BCLK on the 6600 anyway, as I said.

No problem, i might spend a little over budget for the 6600K i guess, might get a little more FPS on games too, i think im actually going to get this build so thanks alot man.
Never built a PC so it'll be my first .

T20125121518H wrote No problem, i might spend a little over budget for the 6600K i guess, might get a little more FPS on games too, i think im actually going to get this build so thanks alot man.
Never built a PC so it'll be my first .

I'd personally recommend a 970 over a 390, but there's a lot of opinions surrounding this particular argument!

I have a 970, and at this point I'd take the 390 over the 970. My reasoning- The 390 is simply better in most cases. The 390 has also been doing better with driver updates and will have better DX12 support so is more likely to be better in the future. Right now, they're pretty neck and neck but the 390 does typically come slightly ahead of the 970. Either card is a perfectly fine choice though, so OP, here is a 970 alternative;
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Pretty much the same. Has SLI support so a 2nd 970 can be added at any point. It's a little more expensive because SLI support isn't cheap on motherboards, and you need to pay a bit of a premium for it, whereas the majority of motherboards have XFire support, unless they only have one PCIe slot. The 970 is more efficient, so 650W is more than enough for 2 of 'em, but for 2 x 390's, you'd need a nice 850W unit.

The only valid reason I personally see for choosing the 970 over the 390 at this point is if you require a more efficient card(for whatever reason), or need NVidia specific features(most people don't).