I have 2 Quicksilvers that I use. One has a 1.25Ghz G4 upgrade with 2MB L3 cache and is pretty fast. The other machine is a G4-800 with no L3 cache and kind of slow. Recently I decided to upgrade the 800 unit and found a G4-867 with 2Mb L3 on ebay for $10 shipped. Xbench 1.3 shows the different between the 800 and 867/2MB is pretty huge (if that benchmark is to be believed). The 1.25Ghz machines gets a score of 56.67 (ATI 9000 video, 160GB IDE HD) while the 867 now gets 42.56 (Geforce 2 MX and the same 160GB IDE HD). I think the 800 got a score in the mid 20's.

Makes me wonder why Apple even bothered to make a QS 2001 with 733 no L3 cache and a QS 2002 with a 800 no L3 cache.