Im looking to buy a new laptop however I am on a tiny budget resticiting me to the cheapest models. In order to achive some sort of perfomance im going to buy a £300 laptop with 512MB and beef that upto 2GB which costs a mear £45 extra. there are however 2 choices in my price range.
The Turion 64 is a much better chip. It's 64 bit and has frequency scaling that prolongs battery life. The Celeron M 430 is a Core Solo without SpeedStep. It'll go through a battery in a hurry. The Turion 64 is probably a touch faster as well.
Intel charges quite a bit for their chipsets and that also adds to the cost of an Intel notebook. AMD notebooks are on average $100-300 less than a more or less comparable Intel unit partially because AMD is practically giving their CPUs away right now. Also, NVIDIA and ATi don't charge nearly as much for chipsets as Intel does.
The best notebook chip out there is the Core 2 Duo, but Intel also charges quite a premium for it, especially on the faster models. The Turion 64 X2s are decent chips as well. They are not as fast as the Core 2 Duos are but they are much cheaper.