I5 3330

My first question is, have you already purchased the other components?

It will be sufficient! And as Deadjon asks, have you already bought the other components, because there would much likely be better options?  

i already had the other components as my old mother board blew up i will upgrade componentsas and when main question is is the i5 3330 as good as i5 2500

It is as good yes - With Turbo it boosts to 3.2Ghz, only 100mhz below the i5 2500, and the IPC on the Ivy Bridge CPUs are slightly better. At worst it will perform the same while consuming less power.

The ivy-bridge architecture is about 10% faster than the old sandybridge at the same clock speeds.

So let us do the math

Clock speed difference between i5-2500 (3.70) and i5-3330 (3.20)

3.70 / 3.20 = 1.15625

1.15625 - 1 = 0.15625

0.15625 * 100 = 15,625%

So, if we cut 10% from the 15,625%

15,625% - 10% = 5,625%

The i5-2500 will be slightly faster. But will also consume more power in the process.  

thanks guys so if i have turbo boost on all the time will it damage the cpu at all

Turbo is determined by the CPU. The CPU will turn turbo on during intense situations where performance is needed. Turbo relies on heat, usage and power. You will not damage the CPU.

I forgot the Sandy Bridge CPUs had decent Turbo Boost - Sometimes I forget Non-K processors exist.

I miss the old days where every processor was prime for an OC. You didn't need multipliers to push a 50 - 100% OC, just a decent proc and mobo and a hell 'uva lot of FSB speed.

thanks again guys i know i need a better gpu any suggestions

Budget for new GPU?

£100-£150 each

Go for a Radeon HD 7850

http://www.pixmania.co.uk/uk/uk/12947777/art/sapphire-t...

Excellent price/performance.

I own an i5 3450 which is just 100 mhz more and it gives decent performance. your 3330 should give the sample

I own an i5 3450 which is just 100 mhz more and it gives decent performance. your 3330 should give the sample