No, you can't.
Show me where you can buy a Dell Poweredge server with a 1.2 GHz processor and using the motherboard that Dell shipped last June.
And big companies like to have all of their hardware the same. So they tend to buy in lots, store them and build them later.
It's more efficient than trying to customize each box, have each one be a bit different, some older, some newer. It makes management of the devices easier because you don't have to worry about big changes in things like the BIOS or ACPI or what revision of firmware is on the remote console card. The accounting department likes it that way too.
Lots of firms have had Dell deliver their desktop and server computers and even had Dell finish the installation itself, on site, in record time.
I remember reading a story in either Businessweek or Fortune about Dell doing deals of that nature a few years back.
They sure do. But big companies don't use them for that. Big companies buy in bulk and build what they need when they need it. That's what an IT department is for, after all.
Then you would own a Dell! It wouldn't be so funny if you had a clue.. honest.
Not even, and it's not a Dell-specific problem, just reality. We have a bunch of Dell notebooks here, and bought some more not much later, wanting the same hardware since we Ghost everything. Sorry, the new ones have a different video card.
In the 90s my company ordered hundreds of Gateways at one shot. Even these same-model systems didn't always have exactly the same hardware.