this and your model http://esupport.sony.com/US/p/model-find.pl?mdl=sony%20vaio%20pcg-7154l&PRODTYPE=32,33,127,63,71,118,7,102,26,80,119,72,125,44,55,27,74,84,57,61,108,115,109,103,89,113,35,78,48,77,106,29,123,50,39,64,114,12,41,58,52,81,60,45,66,73,101,76,86,62,54,67,70,68,2,17,1,88,116,100,82,110,25,128,28,120,83,59,69,112,49,24,104,124,53,122,79,121,42,46,13,105,126,6,85,3,36,9,51,111,47,38,4,34,37,43,117,5