Most CPUs with a one year warranty, unless you upgrade the warranty, are retail chips. So theres basicaly no difference except you get a fan/heatsink and a purdy box with a nice warranty, which appeals to most consumers, and you pay more. Where as one with a 30 day warranty is most likely an OEM chip and is noramly intended for resellers to put into systems, thus a lower warranty on the actual chip. So to answer your question, no, it has nothing to do witht he chips quality.