G-Skill 4GB DDR3 1333MHz Memory Module
£15.99 including vat.
http://www.ebuyer.co...10600cl9s-4gbnt
specifications
Technical Specification
Manufacturer ID: F3-10600CL9S-4GBNT
General
Storage Capacity4 GBUpgrade TypeGeneric
Memory
TypeDRAMTechnologyDDR3 SDRAMForm FactorDIMM 240-pinMemory Speed1333 MHz ( PC3-10600 )Latency TimingsCL9 ( 9-9-9-24 )Data Integrity CheckNon-ECCRAM FeaturesUnbufferedSupply Voltage1.5 V
Expansion / Connectivity
Compatible Slots1 x memory - DIMM 240-pin
plus delivery at £2.99