Rating: 
Summary: Does not work in Dell Inspiron 4000
Review: Tried this in a Dell Inspiron 4000 and it would not work. Dell states PC133 will not work in the Insprion 4000. PNY tech support states this memory is NOT BACKWORD COMPATIBLE, despite the claims made by other reviewers.
Rating:
Summary: lucky ugrade
Review: what i was looking for was a PC100 256mb memory upgrade ... Thankfully my laptop accepted this PC133 sodimm and has been performing beautifully ever since. i now intend to add another 256mb.
Rating: 
Summary: Wrong title & description. AlsoIncompatible with IBM TP 390x
Review: When I purchased this memory a week back, Amazon had it listed as a PC100 memory. I received it after a long wait (10 days!) only to find out it's a PC133 and incompatible with my Thinkpad 390X 2626. I hope Amazon processes my return quickly.As for the chip, I purchased a Centon with same specs and it works fine in my PC100 system. According to the Centon tech I spoke to, they make their chips with backward compatible chips; unlike PNY.
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