Help me finish my gaming computer for under £400

[GodlessGamer]

Hello there guys, i have been upgrading my acer predator g5900 to get the most bang for my buck in terms of modern gaming performance.
current upgrade specs are :

intel core i5 processer 650
8gb DDR3 - upgraded from 4
gtx 580 twin frozr 2 - upgraded from gt 340
500 gb HDD

with this setup i can max skyrim and other such games, however due to the old equipment it sucks at calculations (arma 2)

i have a budget of £300 - £400

what i need is:
- new motherboard, capable of sli, and extra slots for fans, or maby even water coolers etc if needed
- new processor
- new case, (this one pools hot air like mad, and is, well... cosy to say the least)
and i have already decided on a corsair 650w power supply.

what can you reccomend? i have little knowledge of anything aside from graphics cards, i am fairly new to pc gaming, so please don't hate me if i noob out on you. all the parts i am having fitted for a small price

Massive thanks in advance

 

[Mousemonkey]

This topic has been moved from the section CPU & Components to section Systems by Mousemonkey

 

[DarkOutlaw]

i5 3750k
Asrock z77 Extreme4
Cooler Master Hyper 212 Evo heatsink
Whatever case you prefer, there are alot of good ones out there. As long as its a full case, has fans on the front, side, back, top you cant really go that wrong.

 

[GodlessGamer]

thankyou outlaw, very helpful appreciate the effort mate, will look futher into you're suggestions

 

[jerreddredd]

thankyou outlaw, very helpful appreciate the effort mate, will look futher into you're suggestions

mmmm why ask for a SLI motherboard, the then list a GTX 580 and only a 650w PSU? you can't SLI on that small of PSU.

drop the SLI requirement or up your PSU.

if you are not into over clocking then go with a non- "k" series i5 (3550 or 3570) and H77 MB to save some money.

 

[metal orient]

Have you tried overclocking your cpu? Might make it a cheaper upgrade.