Build a DX10 rig for under £176

The Athlon also has twice the L1 cache of the Pentium, which gives it another advantage. The only area where the Athlon will really fall down is in video encoding, but unless you're intending to rip lots of DVDs, it's not particularly a huge issue.

Spend another fiver and you can pick up the Athlon 64 X2 4800+, running at 2.5GHz for £45. As all these CPUs are boxed retail products, you don't need to worry about buying a cooler either, as one is supplied.