Ok, did some testing last night, I have a 4000 with 128m 400mhz cpu. Boot time is app. 30-35 sec from dead stop to browser refresh. 4100 with 128m 233mhz takes 65-70 sec boot.
Can someone with a 4000 with 128 mem or better check their boot time. Type
http://snapserver/config into browser, press start on snap, when fans kick on, start count. About ten seconds after fans start, hit enter or reload the browser, when the page finally refreshes, that is the count I am using. (time the fans start to page refresh)
Few other thinigs I can tell you about the 4000/4100. Both use the 82439tx Northbridge chip, Both use pentium pro 233 mhz cpu.