Still using yours?   I am - a PII 266MHz Slot 1 on an Intel LX board. Can you make it go faster, aka: overclock it?  Not very easy up until lately. The PII's are locked, and the BIOS automatically determines the speed. I'd tried fooling around with the jumpers on the motherboard a couple of years ago, and proceeded to lock it up to no POST. So, I gave up, not wanting to fry anything I might need down the road, like a processor. Wasn't that big a deal.
  
Then, a short time ago, I ran across a very nice little tweaking proggy called SoftFSB. You can find SoftFSB v1.7 at Tweakfiles.com. At this point, a word of caution. If you're not absolutely positive about what your system specs are, and/or it's your only computer that you depend on for the rent and such, please do a little more reading on the plus' and minus' of over amping yer unit.    ...but, what the hell, my warranty with Cybermax is pretty much history, especially now that they're not a company anymore, from what I read.The Scot in me says it's hard to justify putting out big bucks for a faster model when the present one has been doing just fine for the last 4 years. In fact, it's what's doing this. Photoshop only takes around 12 to 15 seconds to open the first time on mine. It took 2 seconds on my friend's new Thunderbird 1Gig / 256M Ram. So? 10 seconds longer? It's just the idea of the whole thing, ain't it, damned Jones's. (Av's) Far from being on the cutting edge, I don't even have a knife.
  
SoftFSB has an autoload option at windows startup, but you still have to manually set it. Since there is no installation program, just put the folder in your Programs folder and put a shortcut to it somewhere handy.
 
 After numerous tries, I managed to up the Front Side Bus from 66MHz @ 266MHz to a stable 75MHz @ 300MHz. I actually got it up to 333MHz for awhile, until I popped in MS Flight Simulator II. End of story there. Frozen computer. Hard freeze, too. Same as when I set it at 350MHz. Didn't like that one, either.

  Heat is the biggest problem in gassin' up your stuff. (This is your brain on fried CPU.) I have an old CPU fan that was lying around that I put on my TNT video chip's heatsink to cool that puppy down as much as I could, and cheaply. Seems to work fine. And, the P-II definately  puts out some heat when you turn it up, so I added a 80 or 90 mm fan (it didn't say, I didn't measure it, and it was plenty big - and noisy) I had from an old dead p/s. I mounted it with some stiff pipe strap to the inside of the case so that it blew down on the cpu and also the vid card. And, I added another large intake fan on the front, and last but not least, hand rolled all my IDE cables into rounded ones, and kept rolled with small wire ties. This really  helps with airflow. My place is out in the high desert mountains, so it's pretty dusty. I used to run with the case cover off, but it gets entirely too dirty, not to mention the noise level of 5 fans. This would be a good place for a pic. Too bad it's all sitting there altogether. Next time I get bored, I'll take it apart and flash it for you. All this stuff was free, too, the cooling stuff, that is.

  The best STABLE increase I could get was 12+% increase at 300MHz. It's actually noteworthy. I got a 25% increase in performance at 333MHz, which was really noticeable on such a slow machine, but when I opened Flight Simulator II, it froze solid. Really solid.

  One thing, though, I also tweaked my Viper 550 from 90MHz to 115MHz, and I'm thinking this may have a bit to do with it not liking Flight Sim @ 333. ...[besides it being another MS program].
  And, not to mention, I have mixed sdram. The original 64 megs of PC66 and a 128meg stick of Mushkin PC100 CAS2 (ttl:192). Anyway, I have the mem set to CAS2 / Fast in the bios, which also gives a bit of a kick. Have to have good ram to do this one, though, or it won't work. And, the BIGGEST bang for your buck is just to add more ram. You won't believe the difference it makes. Winders 98 and I think, ME, will only work on up TO 512 megs of ram. After that, you have to do some registry work and edit some files, which isn't worth it to me. I believe around 384 would be nice, although I'm thinking of 2 - 256meg modules, now that it's affordable.
  The price of ram is a giveaway. At the time I write this part, 256megs of Micron PC133 CAS2 ram is $33 plus shipping. It's almost more for the shipping anymore. And, until the m/b makers get this DDR technology down as well as they have the SDR technology, I'll stick with SDR for the moment. Cheez, how much faster is a quarter of a blink of an eye over a third of a blink? About the only way you can REALLY tell is to load something like SisoftSandra and be able to see it in a graph.

  My boys tell me that MS Flight Sim won't run on their 450 PIII - SIS 8Meg AGP, 128 Megs ram, but it works swell on mine. [I nailed 24 enemies and no losses the other day - yeah, baby] (Purely Scientifc Observation, 'cuz I was in easy modes)

 nVidia TNT VIDEO CARD USERS: You can use the new nVidia drivers on this old card. And, you can crank it up with TweakTNT. It's easy to use, fast, and doesn't have an installation program, and it has a Load with Windows Startup option. I have my card (with the extra fan on it - a MUST) turned up to 115MHz from the stock 90Mhz. It seems to run OK at 120Mhz, but I'm not that concerned with fps games, I just want Spider to move those cards NOW. And occasionally, Flight Sim 2. Mostly I use graphics programs and web design stuff, so I don't need a racy GeForce or Radeon. In fact, I'm only putting a TNT2 32 meg card in my upgrade. Ain't got time to be good enough at games and do all the other stuff I do. Priorities.