The following are the precautions before replacing the memory:
First, we need to see what system you are using. Because 32-bit can support 3.25~3.5G memory at most, that is to say, if you upgrade to 4G, you will waste about 500M unless you reinstall (note: 32-bit can't directly upgrade to 64-bit system, you need to reinstall) or you use a 64-bit system.
If you don't change the system, it is suggested to add a 1G memory to form 3G.
If the memory is changed, does this machine use DDR3? 1333MHz, not buying DDR2 or DDR3? 1600 MHz.
Also, if you want to add 2G directly, you must buy the right one. The suggestion should be the same brand, namely (Hynix) Hyundai. Of course, you can't buy other brands, but it is recommended to take the machine with you when you buy it. If you have any problems, you can directly ask the boss to change it. . .