I've saw a great deal of Kingston Hyper X X1 2X4 GB memory in Amazon that only 40 bucks, here is the link:http://www.amazon.com/Kingston-240-..._m=ATVPDKIKX0DER&pf_rd_r=15RNC3FM3VVH3QGMDVJR I really want to upgrade my MBP to 8GB memory, but I don't know whether this one fit or not. Is 1600 a little high. BTW, this memory seems like have relate to the World of Tanks, does it means that I buy the memory and the game at the same time? what's more, is this a good deal? There is no customer reviews on it, maybe it's not so good. Can anyone give me some advice about which memory to buy? Thank you!!