Instructions:Crucial is probably the best computer memory you can get. They have maintained a high reputation for reliability and performance. If you're either a reader of ComputerShopper, ComputerBuyer, these codes will now give you 5% off. Buy through QuidCo.Com to earn 10% in cashback and use their link for the 5% off for September only... Or use the direct link opposite for just the 5% off. Free delivery on a £25 spend too.