Will DDR work with DDR2?

Okay, I know this is a really stupid question (probably), but this is the first time in as long as I can remember that I've had enough money to upgrade my computer, and certainly the first time I've decided to upgrade RAM.

Well, my quick question, will 240 pin DDR2 chips work in a motherboard that previously had DDR chips?

Thanks in advance,
Daniel

nope

check newegg.com to see if you can find 2 gig ddr chips (however if you are using a 32 bit operating system then your computer will have a limit of roughly 3.5 gigs of ram)

And yes to use ddr2 or ddr3 you need to upgrade your mobo accordingly.

Yea, 168 is extremely old SDram
(Which I order a TON of. For some stupid reason, customers ignore my advice and keep nickel and diming their 15 year old machines to death. 40 dollars here for a new PSU, 50 dollars there for a new IDE HDD, 35 dollars here for a new ODD, 80 dollars there for a tiny ram upgrade. Then again, I wont complain until my distros stop carrying these parts. )

184 is DDR ram And both DDR2 and DDR3 is 240 pin ram, though they're not intercompatable.