>>>>So how do I get Vista to use 4 Gig? It only reports 3 GB RAM.
>>>>
>>>
>>>It's probably because of your hardware, usually video cards cause that because they are memory mapped. If you have a 64-bit capable processor, you can enable PAE mode but be warned = Vista runs slower with PAE enabled due to page translation. You will have to disable data execution prevention as well.
>>>
>>>I'd do some research on it because I considered doing all that.
>>
>>I asked that 3/4 gig question a while ago. The answer was that Vista reports 3 gigs but uses more
>
>IOW, it gives you 3 to use and keeps the rest to itself?
>
>Does anyone remember UMB, EMS, XMS? Sounds so familiar :).

Yes, Prof. I agree with your calculations