Need help upgrading current PC!

[Xanoas]

My current build is pretty crap. I've decided to build a new PC all together, but I'd like to upgrade this one as well for my older brother. The budget is at £350 as my mother is paying for the upgrade. I'd like it to be able to play most games at medium to high settings at 720p.

CPU - Intel Celeron G1620 @ 2.70GHz Ivy Bridge 22nm Technology

RAM - 6.00GB Dual-Channel DDR3 @ 665MHz

GPU - Intel HD Graphics (Gigabyte)

Motherboard - H61M-DS2 DVI

Hard Drive - Western Digital Blue WD5000AAKX 500GB

Hard Drive 2 - Hitachi Deskstar HDP7250550GLA360 500GB

PSU - FSP250-60HCN

 

[profoundnoah]

Heres my part list. I recommend that you research if you're able to even configure in that case. http://uk.pcpartpicker.com/p/vkNQQ7