Dell PC-133 vs. PC2100 (DDR133)

[hbar]

I'm upgrading an old Dell Smartstep 100D and the stamp on the RAM says PC133. I figured it was the same stuff as PC2100 (DDR133), but as I looked through some online stores I found stuff named PC133. It was on microcenter.com and nearly costs twice as much as PC2100 from newegg.com. SO, is the cheaper PC2100 compatible?

[hbar]

OK, it's NOT the same stuff. PC133 is 168pin instead of 184pin. Has anyone ever upgraded a 100D, and what brand RAM was compatible? I see a lot of bad reviews about certain brands, but the people may not have known what they were doing.

[Van Nugent]

The older PC66, PC100 and PC133 are 168-pin SDRAM for older systems. The newer PC1600, PC2100, PC2400, PC3200 etc. are 184-pin DDR RAM used on most current systems. If you're not sure what brands work good for your motherboard, use only low density modules.

[Van Nugent]

You can find memory at much cheaper prices from www.pricewatch.com (http://www.pricewatch.com) .

[PhilEnfield]

This is what Crucial guarantees will work :

http://www.crucial.com/uk/store/listparts.asp?Mfr%2BProductline=Dell%2BSmartStep&mfr=Dell&tabid=AM&model=SmartStep+100D&submit=Go

It may cost a bit more, but they will refund if their recommended RAM is not compatible.