DIM4400 internal HD's (Which one to buy)

[Chappu]

Im looking to upgrade the hard drive on my dell 4400, or possibly just add a second one. Though I dont know much about them, is there different kinds of internal HD's?
http://support.dell.com/support/edocs/systems/dim4400/specs.htm
This is a link to all the specs of the computer i own, using this could you tell me the kind to buy for it so i dont get the wrong one. thanks

 

[Rik]

Your pc will take ata hard drives only. Not sata ones.

 

[Chappu]

which one, i was looking on NEw egg for some HD's but they have 2 different ATA: IDE Ultra ATA100,IDE Ultra ATA133 whats the difference?

 

[Rik]

Your linked specs say maximim of ata 100, thats the fastest your mobo can go. You can use ata 133's as they are backwards compatable but they will only run at ata 100 speed.

My advice, go for ata 133, that way you could use an ata133 raid card at a later date if you wanted a little more hdd speed.