Future PC Build

So now I have quite decent PC (at least for me it quite good,or acceptable)

It's a prebuilt pc,I know...but my dad bought it for me,he's scared that I would mess things up if I build it myself.

Current PC Specs :

Intel Core i5-3350P @ 3.3GHz

Windows 8 OEM (from Acer)

Nvidia GT 620 overclocked (I was surprised by it,at first I thought it would give an extremely bad performance,but it got through pretty well. It actually plays Metro 2033 (from steam.DX9,all settings on lowest possible,800x600,38.6-64fps,sometimes I do play it on 1024x768,1920x1080 gives it about 20-25fps.)

4GB DDR3 @ 1600MHz

Motherboard is made by Acer and was based on B75 chipset

Usually I run dual monitors on it.

Future PC Build Spec (at least for now)

Core i7-4770K

Corsair H100i

Motherboard Choices (mini ITX or Micro ATX)

Gigabyte GA-Z87M-D3H or Asus Z87-DELUXE

8GB Corsair Vengeance DDR3-2133

Kingston HyperX 3K 120GB SSD

Seagate Barracuda 2TB 7200RPM HDD

EVGA GTX 770 SC ACX 4GB or DirectCU II GTX 770 2GB

Bitfenix Prodigy for ITX and Corsair 350D for ATX

Corsair HX850 PSU (Semi-Modular,850W,80 Plus Gold

Price currently is around $1550.

This PC is pretty solid but if I were you I would do the following changes. Get a cheaper PSU, you dont need 850w for that build, not even for a sli configuration, go for an i5 4670k because the i7 is really an overkill, lower storage HDD unless you really need the space, 1866 or 1600 mhz RAM because if this PC is purely for gaming the frequency of the RAM will not affect the performance and with the money saved from all these changes you should be close to getting a gtx 780 instead of a 770 and that would be nice.

This PC is mainly for gaming and some Adobe Programs (Premiere Pro,Photoshop,Indesign)

Ok

Switched to 4670K,Corsair Vengeance LP 8GB DDR3-1600,and Corsair HX650,swapped the 770 for an EVGA GTX 780 Classified

Price is around $1510.

I suggest the Corsair 350 case and totally agree with all Ghall's points.