THE issue here that everyone here is missing is NOT "IDE Vs SATA"
It's Intel 845GV chipset.
While you can indeed run a 500gb IDE drive in that computer (with a controller card), if you install a 500gb hard drive that's already formatted to the MoBo the OS installer is going to choke. (as will the bios of the board) as
any drive 160gb or larger won't even be recognized!
You CAN run a 500gb drive, but only on a PCI controller card, because tthis computer has an inherent issue with the chipset, that issue is it is NOT 48LBA capable.
Meaning if you connect an unformatted drive larger than 128gb to it
that computer will stop recognizing it the instant the combined total
of all created partitins on it exceed 128Gb
This can be side-stepped by running the drive via a controller card,
but if you go that route there are other issues....
the first is that a controller card plus a SATA hard drive is enough cheaper
than a controller card and an IDE drive to leave you with enough change to buy TWO sata drives... or a more modern mother board to connect them to...
The second thing is that there is an inherent stability issue running a SYSTEM drive via a controller.
I used to have a stack of Dell 2400 computers, I've gradually given them away already set up with a fresh clean installation of XP-pro-sp3 on them... to Seniors to use as "e-mail, facebook and share pictures with the grandkids" computers, as frankly they aren't capable of a whole lot more.
When I run out of used IDE hard drives smaller than 160gb any 2400's that are left will be uncerimoniously scrapped..
Frankly I'd offer you a deal on a Dell 3000, which is basically identical to your computer, but has the intel 865GV chipset (the first intel chipset that natively recognizes 48LBA drives) but there are much better upgrades around for you than a seven year old refugee from a recycling bin...
If you want the Dell 3000 MoBo message me.
But what would be better for you would be a Dell 4600 (also Intel 865GV based), but has an AGP Video card slot AND has 2 SATA jacks on the MoBo
It's early SATa so they are only SATA1.5 but SATA3.0 is back-compatible..
I've got a Dell 4600 here running a pair of SATA3.0 WD blue 500gb drives
(it's used as a dedicated publishing computer for an Alumnai association
newsletter), it runs XP fairly well, but... again there are better fish in the sea...