This is about ram. The top one is the ram on my Toshiba Satellite L505 S5990. And the bottom one is from a Toshiba as well. Will the bottom stick work with my current top stick? I was looking at the readings on there and everything seems to be the same except the last 2 numbers?? RIght now I just have a 2gb stick and a 1gb stick and figured i could upgrade this to 2 2gb sticks. Will this work?