That would be wrong. :p
It isn’t uncommon for server farms to have individual blade servers with 32 GB per individual system.
No doubt. As do Win32 servers. But if you look at the 32GB, not all is availaible. Maybe 30.5GB or 31GB, etc., but not the whole 32GB.
I have an HP Itanium 2. It has 8GB of RAM. Looking at it right now it has 7.98GB available. That's rounding off of course :)
The reason "home" or "gamer" machines take it in the shorts is that they have video cards that have gobs of memory. And, unfortunately, those memory addresses have to stay below 4GB. So a video card with 768MB of RAM sucks that much away from your total of 4GB RAM. As it's rare for a server to have such a card it "loses" much less due to video memory addresses.