are RAM bad quality?

I bought two 512 memories to increase my laptop's RAM.It was 512 RAM.After I installed these two new chips,my pc shows RAM is 704! It is suppose to be 1G
RAM, what is the problem?Is it possible that one of the chips doesn't work well?

所有跟帖： 

• video card used 320MB ( 1024 - 704 = 320 ) -6sa7- ♂ (0 bytes) () 03/02/2010 postreply 13:36:57

• 回複：video card used 320MB ( 1024 - 704 = 320 ) -SlenderGirl- ♀ (90 bytes) () 03/02/2010 postreply 13:58:24

• 好的顯卡用單獨的內存，video ram，另外顯卡驅動可以動態 -6sa7- ♂ (37 bytes) () 03/02/2010 postreply 14:16:29

• 舊筆記本板載顯卡能吃掉320M麽？通常8-64MB -flywhc- ♂ (0 bytes) () 03/02/2010 postreply 13:58:52

• 那是幾年前的老皇曆的，現在玩3D 256MB都不夠 -6sa7- ♂ (0 bytes) () 03/02/2010 postreply 14:17:26

• 你覺得樓主512MB的筆記本電腦，可能是新電腦麽？ -flywhc- ♂ (90 bytes) () 03/03/2010 postreply 14:31:23

• 可能主板不支持，可能被分配到顯卡做顯存去了 -flywhc- ♂ (133 bytes) () 03/02/2010 postreply 13:38:00

• I tried other 2 new chips, my pc even shows 512 RAM! -SlenderGirl- ♀ (0 bytes) () 03/02/2010 postreply 14:02:22

• 內存不兼容 -6sa7- ♂ (0 bytes) () 03/02/2010 postreply 14:18:16

• 回複：內存不兼容 -SlenderGirl- ♀ (58 bytes) () 03/02/2010 postreply 15:29:00

• 很難說，有些人加內存以後問題多多，換個牌子又沒事了 -6sa7- ♂ (0 bytes) () 03/02/2010 postreply 15:31:23

• This is what I am going to try to do.Thanks a lot! -SlenderGirl- ♀ (0 bytes) () 03/02/2010 postreply 15:42:28

• 有些老筆記本隻支持768M內存比如華碩s5A -cruiseliu- ♂ (0 bytes) () 03/02/2010 postreply 15:38:10

• 你的筆記本型號是？ -cruiseliu- ♂ (0 bytes) () 03/02/2010 postreply 15:39:18

• VAIO PCG9L ? -SlenderGirl- ♀ (0 bytes) () 03/02/2010 postreply 15:53:29

• If you search you can find many Sony users have -dudaan- ♂ (179 bytes) () 03/02/2010 postreply 17:42:30