Looking for advice - Gaming PC

[Katkit]

Hi all, I'm looking to buy/build a new gaming computer for myself as my current PC is struggling with newer games.
I don't really have any idea what is good to buy and what isn't so any advice would be greatly appreciated.

My budget is £500 can't really go any higher than that, I don't need an OS, Monitor or any peripherals.

 

[stulid]

Hi,

What is your current setup?

Do you have anything that can be reused such as case, PSU drives?

 

[Katkit]

Hey, so my current PC has the following ;

CPU: AMD Athlon II X3 440 3.00 GHz
Motherboard: ASRock M3A770DE
GFX: ATI AMD Radeon HD 5670
RAM: 4gb

I'm not sure about whether or not the PSU is reusable and I don't know what make/brand the case is, but this current PC was put together by my brother when it was built so I'd assume it can be reused?

 

[stulid]

Upload a photo of the case as I may be able to recognise it.

The PSU will have a label on it.

What drives do you have? Are they all SATA?