So I bought a RAM upgrade today and the guy went in the back for 1600Mhz RAM and brought out a 8GB set and I didn't look at it and just bought it. When I got back I was stoked to finally get it in and after I installed it I checked ATM and it said 8GB DDR3 1333. I was bummed but honestly don't want to pull it out and drive 15 minutes to return it. Will it be a major difference between the 1333 and the 1600? Thanks for any replies.