Hey guys, I just ordered a new 27" iMac with an i7, 512GB SSD, GTX 780M, and 8GB of RAM. I plan to upgrade the ram by ordering an additional 16GB from crucial (this seems to be the most recommended brand on these forums) for a total of 24GB. I'm a bit confused though. Crucial sells the 16GB ram for $164: http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=73C76E07A5CA7304 but amazon seems to sell the same part for $138: http://www.amazon.com/gp/product/B0...rd_t=301&pf_rd_p=1263465782&pf_rd_i=CT4949522 I was going to buy from amazon but the part numbers seem to be different. Can anyone point out the differences? Thanks. Also, I want to be sure that my screen has no dead pixels/screen bleed/yellow tinting. I've read that a few people have had this issue. Although I know what dead pixels are, how do I identify screen bleed/yellow tint in the best way? I appreciate the help!