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Naraku_Diabolos said:

I'm quite happy that I have Windows Vista Ultimate 64-bit on my laptop with 4 GBs of RAM. With Ultimate on a 64-bit processor(s; I have 2 processors of 64-bit), you can upgrade your PC to nearly 128 GBs of RAM. Yes, one-hundred and twenty-eight gigabytes of RAM.

Not unless your motherboard supports it though.  I don't think I've ever seen a laptop that supports more than 4 gigabytes of RAM.