New Budget Build~~NEED HELP! THANKS!

Budget Range: £450 and under

System Usage from Most to Least Important: Gaming

Are you buying a monitor: No

Parts to Upgrade: New build, although I would like a little bit of future proofing

Do you need to buy OS: No, I have already got

Preferred Website(s) for Parts: www.amazon.co.uk

Location: Perthshire, Scotland

Parts Preferences: Most preferably AMD, but if I can get an intel i5 for a slightly higher price, and in turn spend a little less on graphics card but get better performance then i'll be happy

Overclocking: Yes

SLI or Crossfire: No, I dont think the FX4170 would be able to handle two hd 7870s before bottlenecking

Your Monitor Resolution: Im not completely sure, but under 1500 by 1000

Additional Comments: Play mostly rFactor 2 (I really want to be able to play that maxed out, Richard Burns Rally and all racing simulations, and possibly Mine Craft, which I have no doubt any system can pretty much run

And Most Importantly, Why Are You Upgrading: I have a laptop with Intel HD Graphics and a 1st generation i3, although I will still use it for normal stuff

Current Idea

Processor: AMD FX4170 4.2 ghz AM3+ http://www.amazon.co.uk/AMD-FX-4170-Processor-4-2GHz/dp... Price: £92
RAM: 8GB RAM, I'm not sure which brand is cheapest on Amazon, and should i get 1333 mhz or 1600 mhz Price: under £40 preferably
Motherboard: Asus M5A78L-M/USB3 Motherboard http://www.amazon.co.uk/Asus-M5A78L-M-USB3-Motherboard-... Price: £51
Storage: Seagate Barracuda 3.5 inch 500GB 7200RPM 16MB 6GB/S Internal SATA Drive http://www.amazon.co.uk/Seagate-Barracuda-500GB-Interna... Price: £44
Graphics card: Sapphire AMD Radeon HD 7870 Dual-X Overclock edition 2GB GDDR5 http://www.amazon.co.uk/Sapphire-11199-19-20G-CrossFire... Price: £177
Case, PSU and Fans: Cit Vantage Type-R Black Gaming Case with 750W PSU Price: £54

VERY IMPORTANT QUESTION!: will the Cit Vantage Type-R case fit this configuration, and if so, do you have any idea how this will run rFactor 2?
and will I be able to get a good overclock on the AMD FX4170 and the Sapphire HD7870 2GB with a 750W PSU and those cooling fans, and finally, will the AMD FX4170 bottleneck the Sapphire HD7870 2GB

IM REALLY WORRIED THE GRAPHICS CARD WONT FIT CASE

THANKS GREATLY FOR READING!
now please comment