|Where are you getting that figure from? |
There's no such thing as 528mb memory modules.
Thery're 64, 128, 256, 512, 1,024 mb (1gb) etc. on modern computers
The amount of ram you have installed in the mboard is shown as the Physical memory amount in System Information.
(Start - Run - type: msinfo32 , click on OK or press Enter - look on the right side.)
Some bioses subtract the amount of ram that's shared with the onboard video - the video built into the mboard - from the total amount of ram installed, and that may also be subtracted from the Physical memory amount in Windows.
See response 5 in this for some info about ram compatibilty, and some places where you can find out what will work in your mboard for sure:
Correction to that:
All the ram you have installed will automatically run at the speed ratings of the slowest module. You need to determine what that is for the modules you already have. If that isn't obvious on the labels on the modules, if you have brand name ram, it is usually easy to look up their specs on the brand name's web site by using the part number on them to search with.
If the ram is generic, that may be difficult or impossible.
If your think computer is slow with 2 - 512mb ? modules installed, adding more ram won't help much - you have other problems.
Ultimate Memory Guide
How Much Memory Do You Need? etc.
Windows98 and up, to Vista, Linux, Mac
No mention Windows 7
Update Jan 30 2010 - the same.
How much memory do you really need?
NT Workstation and up
Windows 7 is there.