|Ram that works in another mboard , or any ram you buy or have lying around, may not work properly, or sometimes, not at all - even if it physically fits and is the right overall type (e.g. SDram, DDR, DDR2, etc.; PCxxxx, xxx mhz) for your mboard. In the worst cases of incompatibilty your mboard WILL NOT BOOT with it installed, and the mboard may not even beep - the ram has to be compatible with the mboard and it's chipset.|
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:
Once you know which module ID strings work in your mboard, you can get them from anywhere you like that has ram with those ID strings.
If you have brand name ram, it is usually easy to look up whether it's ID string is in a list of compatible modules found by using your mboard or brand name system model number.
If the ram is generic, that may be difficult or impossible.
Some times it's just a matter of the ram density and the number of chips that are one the module. E.g. Some 1gb modules may have 8 chips, some 16 (8 on each side). Older mboards may not be able to deal with 8 chips on a 1gb module.
Kingston modules compatible with A7v8x.
I picked Kingston because their information tells you clearly how many chips the modules have.
How many chips on the 1 gb module?
It appears a 1 gb module has to have 16 chips for your A7v8x model.
It probably doesn't matter which brand of ram you have or get - it probably must have 16 chips on the module.