i mean this is classic

12GB of 1066MHz DDR3
mac - 12GB (3x4GB) [Add $1,200.00]

pc ram
corsair Outrageously fast 1600MHz performance- 12gb Ultra-low 8-8-8-24 latency

better faster ram £330 i know my maths aren't the best but there wanting to charge you 4x as much for some ram?