I am going to upgrade my RAM to 4GB and have narrowed the options down to two and can't deciede which ones to buy. One is made by Komputerbay (never heard of them) the other is make by Corsair. Here are the links:
http://www.amazon.co.uk/Corsair-TWIN2X4096-6400C5C-800MHz-DDR2-Memory/dp/B0027P9C9G/ref=sr_1_1?ie=UTF8&qid=1321472873&sr=8-1
http://www.amazon.co.uk/Komputerbay-800MHz-PC2-6300-PC2-6400-Desktop/dp/B004LT6O56/ref=sr_1_7?ie=UTF8&qid=1321472826&sr=8-7
http://www.amazon.co.uk/Corsair-TWIN2X4096-6400C5C-800MHz-DDR2-Memory/dp/B0027P9C9G/ref=sr_1_1?ie=UTF8&qid=1321472873&sr=8-1
http://www.amazon.co.uk/Komputerbay-800MHz-PC2-6300-PC2-6400-Desktop/dp/B004LT6O56/ref=sr_1_7?ie=UTF8&qid=1321472826&sr=8-7