(I think I posted this on the wrong forum at first- hope this one is ok!) Hello everybody, first let me say hi as I'm new to this site! I have a Toshiba Satellite U305-S5077, with an Intel Pentium Duel-Core processor T2080, 1024 MB DDR2 SDRAM (512MB X 512MB) (uses PC2-5300) 160 GB HD. I'm looking to upgrade the RAM because it runs a little slow for my tastes with Windows Vista. My question is, would it be beneficial to invest in another Duel Channel/Duel Core RAM Stick, or would it be just the same just to purchase a regular old memory stick (non duel core)? BTW, the RAM's that I'm looking at in particular are: CORSAIR ValueSelect 1GB (2 x 512MB) 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300) Dual Channel Kit Notebook Memory http://www.newegg.com/Product/Product.aspx?Item=N82E16820145156 -or- Kingston 1GB DDR2 PC5300 SO-DIMM / NOTEBOOK MEMORY http://shop3.outpost.com/product/5274167 I don't know much about duel core/duel channel, but when I went on to Crucial's memory uprgrade site, it said the following: So it seems to me like it would be better to buy the duel core. Oh, and one last question, does maximizing/increasing RAM decrease the battery life on a notebook computer? Sorry for all the questions, I am somewhat of a noob. Thanks in advance!