Hi Joddle,
RAM is not specific to the processor.
The Crucial scan is usually very accurate and you can rely on the results.
I think the confusion arises with the addition of Enhanced Performance Profile ICs [EPP] to the RAM module.
Basically this can be used by some AMD chipsets to configure the RAM for ultimate performance.
If it isn't present on the RAM module then the BIOS will just load up the default configuration.
You may not get the very best performance out of the RAM but it will work and to be honest, you would not notice the difference.
In these instances you can actually configure the RAM manually if you wish.
If the RAM module does have EPP it will say "Crossfire Ready" or "SLI Ready"
Basically - it is a marketing ploy.
From your first post you obviously understand the limitations of 32 bit systems - but for others reading this ....
A 32 bit system will only recognise 4 GB RAM [ actually this is nearer to 3.5 GB ]
There is no benefit adding more and the system may not even "see" the additional RAM.
Older motherboards may not even support 4GB RAM.