8GB Total. Two 4GB PC2-6400 200 pin SODIMM DDR2 800MHz for HP. LIFETIME WARRANTY. 64-bit operating system is required to use over 4GB of memory. 32 bit systems such as Windows XP home edition and Vista 32 bit will not recognize more than 4GB of memory.Compatible with DDR2 versions of:HP Pavilion Entertainment Notebook dv7-1200eg 1200eo 1201ef 1201eg 1202ef 1203ef 1203em 1204ef 1204eg 1204tx 1205ef 1205eg 1205eo 1206ef 1206el 1206ez 1207ef 1208ef 1208ez 1209EF 1209em 1210ea 1210ed 1210ef 1210eg 1210el 1210eo 1210er 1210et 1211ea 1211tx 1212ea 1213ea 1213tx 1214ea 1214TX 1215ef 1215eg 1215eo 1215er 1215ez 1215tx 1217em 1220eb 1220ed 1220ef 1220eg 1220el 1220em 1220eo 1220er 1220es 1220ew 1222ez 1223ca 1225ef 1225eo 1225ez 1228ca 1230eb 1230ed 1230eg 1230eo 1230et 1230ew 1230ez 1232nr 1233eo 1235eo 1236ez 1240eb 1240ed 1240ek 1240el 1240eo 1240us 1243cl 1245ca 1245dx 1245ef 1245eo 1247cl 1249ef 1250eb 1250ed 1250eg 1250en 1250eo 1250ep 1250es 1251eg 1252eg 1253ca 1253eo 1255eo 1260ek 1260eo 1260es 1260ew 1260us 1261wm 1262eg 1262us 1264nr 1265eo 1267cl 1270ca 1270eg 1270eo 1270es 1270ez 1270us 1273cl 1273eo 1275dx 1275eo 1279wm 1280ec 1280eg 1280es 1280ew 1285dx 1289eg 1290eg 1290eo 1298el 1299eb 1299ed 1299ef 1299el 1299es 1299ew 1424nr 1426nr 1428ca 1444us 1448ca 1448dx 1450us 1451nr 1464nr 1468nr