Fun with older Powerbooks!
I recently upgraded my daughter's 2300c with a 3400c and she likes the speed improvement. I came accross this system 7 web site and it looks really good. It gives really good resources to get more out of system 7 with little investment, especially since system 7.6.1 already comes on it.
I have a few more 3400cs, one that I have used for simple computing and it came with 9.1. Another has 8.6 and another 8.1. Each one offers something a little different. The most noticeable diference is some newer features and programs and speed differences. On the 9.1 Powerbook, everything run a little slower, but I get to run some OS 9 only programs. Surprisingly, most programs that run on 8.6 run on 9, so I like the faster response of my 8.6 system. I also update two more 3400cs with 9.1 to 9.2.1 on one and 9.2.2 on the other. Funny enough, I seem to prefer the 9.2.1 system, but keep in mind that the upgrades we're not clean installs, so I cannot say definitely that any difference does exist. By the way, I also use CPU DoubIer v1.0 on all these systems although I used to have 1.1 which I lost during a tough move we did from California where we had to give our home furnishings and about 20+ Macs away in the process, mostly to charities and family, except for our trusty Powerbooks.
I have installed a mix of older and newer programs and games on the 7.6.1 system, and they really seem to fly on it and will add speeddoubler to it for more speed! I have a copy of Speed Doubler on the 8.1 system, and it also feels nearly as fast. OS 8.1 does give me a chance to run a few newer prorams, but they bigger programs do run slower.
I am sharing my raw, untested observation on these Powerbooks. I did install four 96mb memory modules I found for these Powerbooks, up from 32mb. The other two had 128mb already. The other factor is that the 8.1 and 9.1 have the faster 240MHz CPU, so this takes those two systems out of a fair comparison, Although I have booted them in SCSI mode, mainly to copy some files between systems, and 8.1 and 9.1 did not seem to suffer greatly running on the slower 180MHz CPUs.
Here's a benchmark site that covers 7.6 to 8.6 without surfdoubler or newer programs, it may prove an interesting read:
http://www.macspeedzone.com/archive/Comparison/76to86.html
It's a relatively simple set of tests given on a 9500/200 tower, but it did appear to show that unless you're in Photoshop all day or need to copy a lot of files, 7.6 did not show itself to be slow at all on this system, although I didn't see how much ram memory it ran with and if virtual memory was on or not (for PPCs, I'm assuming they opted for on).
Another similar link gave the same tests, but on a G3/233 with 96mb ram set to 97 with virtual memory. I wish my 8.5 CD wouldn't have literally snapped in two due to my then toddler's fascination with CDs, I'd hate to reinvest in the same product I already had. Also disregard the name of the web site page, it does compare 8.6 to 9.0, with the obvious speed winner for this matchup:
http://www.macspeedzone.com/archive/Comparison/7.5.1vs7.5.3.html
I am in the process of getting more used 3400s and refurbishing them for kids in the neighborhood, mostly because parents are amazed my little one is so good with computers for her age.
I just wanted to throw in my everyday passion for Macintosh any flavor. Oh and I did get some Orinoco's and all of them are surfing on everything from v6 Orinoco drivers on 7.6 to 7.2 and Airport 2.0.4 on the 9.2.xs.