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system unstable after memory installation

Posted: Fri Nov 25, 2005 9:03 am
by ziqiproject
Hello, I have installed a new ram onto my asus a7v333 mainboard, and now have a prob. I have in total two pc2100 256(1 single sided 1 double), 1 512 pc2100, all works fine individually. and infact, 1 512 and 1 256 also works fine together(768). but if i put on another 256, then there is a prob. in bios i can read memory is 1024, but system often halts when windows xp starts loading. once xp was successfully started up, but after a while autorestarted again. so i doubt there is something wrong with memories.
while i dont know what exactly goin wrong, but some points could be suspicious:

1. mainboard has 3 slots in total, manual says it supports 3gb ram intotal, but i remmbered that some said this board only support 4 banks, so in my case, when all rams are plugged in there are 5 banks, which makes it not possible to work? however if this is the reason why in bios i can still read 1024?

2. is there something to do with the allocation of slots? when i tested i had 256 double sided in slot 1, 512 in slot 2, and 256 single sided in slot 3, havent tried other order yet.

any help pls? thanks alot!

Posted: Fri Nov 25, 2005 10:45 am
by Apoptosis
Boards from that generation hated having all three DIMM's full and you are using more banks than the chipset supports. Since memory has become so cheap I suggest selling off some of your modules and getting some newer ones. A 512MB kit of PC-3200 Kingston memory is going for $41 shipped, while a 1GB kit can be had for $85 shipped. Sticking with the same capacity and brand is always best!