Three-Hundred - Antec
Three Hundred Case - No Power Supply included - External 3 x 5.25 bays - Internal 6 x 3.5 bays - 1 rear 120 x 25 mm TriCool Fan with 3-speed switch control - 1 top special 140 x 25 mm TriCool Fan with 3-speed switch control - 2 front (optional) 120 mm fans to cool the hard drives - 1 side (Optional) 120 x 25 mm Fan to cool graphic cards - Washable air filters - Top mounted USB and Audio ports - Dimensions 45.8 (H) x 46.5 (D) x 20.5 cm (W) - ATX
That CPU is the _BEST_ you can get on the market for gaming. You could choose an i7, but it costs too much compared to the performance boost you get. I have been playing modern titles for quite some time and I havent seen my ingame RAM peak over 5-6GB. Stay at 8GB > Upgrade in the future if you actually catch your machine lacking ram.
I would however consider choosing a bit stronger GPU, fx the 280X or 770 depending on what is cheapest where you live. In my country the price difference between 760 and 280X makes 280X (or 770, the nvidia EQ) the better choice.
Also, the case you are choosing doesn't have any front fan intakes - there is room for them so if you want to add yourself then go ahead, but I would suggest another case depending on what is cheap in your country
I5 4670k/4770k have the best performance per core in single threaded gaming hands down your powersupply is more than enough for your system and descent overclock, although get after market cpu cooler before you do overclock. the memory you have is fine for gaming if you are doing any type of rendering or video editing i would go with 16gbs save the 70+ dollars or put it into a getting gtx 770. if you do decide to go with a 770 you wont have to change anything in your build other than the card itself...your powersupply can handle that too. hope this helps
I would change the HDD for the Seagate ST1000DX001 instead. Although its not as fast as a SSD, the Hybrid version does bring noticeable performance boost. I use one as my secondary drive (SSD is my primary) and its very good.
I didn't check how many PCI-E cables the PSU had > Your description said it only had 1 so I assumed this was true. In which case, i said that a different PSU was needed. After having to read more on it, that is not the case.
Also: that calculator isn't sufficient to make calculations on whether a PSU is sufficient. You need to know whether the PSU can handle the amps on the 12v rail, which this PSU can.