Over all, which of these PCs is better for gaming?

Here's the first one, a CYBERPOWER PC:

http://www.pcworld.co.uk/...l#longDesc

And the second one, a Chillblast PC:

http://www.amazon.co.uk/...00EMCGG50/

So which is better? I want to be able to play games such as Minecraft (on the highest settings), Skyrim, Battlefield 3,4 etc.

Build your own.

Top one for sure has a better graphics card with more video ram.

Either of those PC's will run any game at good graphics.
both easly beat my PC on specs whith runs skyrim at high setings at 40FPS from fraps.
GTS 250/1gig vram with core I5 and 8gig ram and a 10krev spinning platter HDD

For BF4 alone you need to look at something a lot Better.
http://ca.pcpartpicker.com/p/2TWex