Is it possible to write a script that pulls basic computer info (Name,PC Model Number, Processor speed) that will run when a machine is imaged using pxe boot, then update the database using said information?
I'll leave it up to you to decide how you want to put that into a SQL database. Store them as variables in a bash script and then just upload them with an INSERT statement, running from a MySQL command prompt.
Code:
mysql -e "use database_name; insert into table_name values (...);"
It is possible to write code to do this when a machine PXE boots. You'll need to work out where to host the database. This is probably easiest to achieve by creating a custom Linux boot image and then deploy that image on a PXE server. But this is quite a bit more work than just writing a script.