sargentnuts :
Sorry for not responding on time a little busy these days, i have a (Builder 500W Fully Wired Efficient Power Supply)
Its quite cheap, i was thinking of getting one from cooler master or something, if i was to get one how much watts would i need?
The quality of the power supply matters more than the watts. 500W is plenty, but if it's a crap power supply then a quality 450W would be better.
Cooler Master doesn't have very good units on the low end. Depending on your budget, all of these would be good.
https://pcpartpicker.com/products/compare/fZyFf7,nB3RsY,3hkwrH,FdRFf7/
To be clear, do you have the i5-2400 or the i5-2500K? There is no 2400K.