This is a dell!!!!! I wouldn't chance it!!! All the links I found said pc2100 only but I don't know if it will work
Edit - Ok I changed my mind, go for it get some pc3200 ddr400 and give it a whirl,,,, I looked it up on dell's site and it just says 184pin ddr sdram non ecc so It would be worth trying anyway,,,,
VERY GOOD POINT!!!!!! sorry its late over here but i still should have picked that up. your going to have to get some memory that is certified to work with dell pc's stupid ******* proprietary parts