My last thread about this died with the old forums, but it seems it's recycling season in UL or something, which equals free crappy old PCs for me! This week there's a big bin thingy full of complete systems - mostly P75's (that's 75MHz Pentiums for those not in the know). They all seem to be fully working systems too - well the ones that haven't already been raped of their RAM and stuff (and it seems someone got to them before me and my friends did!). I also finally got a stupid retarded non-blown-up Dell PSU so I've actually made a full PII system from free crap! And last night I walked off with one of the P75 systems - luckily there were no security guards around! There were some decent PCs and projectors (actually in use in the lecture halls) stolen over the weekend so I'd say they're a bit twitchy at the moment... There's also some 17" Dell monitors there too - I think they're made by NEC since they say "UltraScan" on them. Sure, they may be 10 years old, but it's better than the 15 year old Taiwanese piece-o-shit I have as a spare at home! Don't suppose anyone knows how well P75's (socket 3) or PII-300's (slot 1) overclock? The Dell motherboards have jumpers for setting the clock speeds, but I can't see anything for the FSBs. I feel like doing silly things to these machines...
P75= why bother Slot 1 get a faster chip. I've got a box of 1 gig slot 1 here... Best bet is to search out an old overclocking a celeron thread for slot 1, used to be really popular.
ooooh free 17" monitors, you lucky sod P75's should run fine on 90mhz at least, but keep in mind that will decrease the bus speed to 30mhz, so try 100 (50x2). And I must say that I find better stuff in the dump, but if they are still complete and working they can still be put to use. And the lack of FSB overclocking on Slot 1 PIIs is normal, that and they don't OC well in my experience.
Yeah, that's what I thought. I went down there today with my fellow Mitsubishi Lancer owner (beats my non-existant car any day!), and everything was gone! All was left under the stairs were a few broken chairs... I'll try putting the P75 at 100MHz, but maybe I'll have to - *gasp* - stick a FAN on it! I take it there's no temp. measuring on systems that old though. Assembler: I know the P75 sucks eggs, but I can really do with a system like that to play all my DOS games properly, or possibly use as a dedicated firewall (though I might use the good ol' 386 for that, now I have stacks of 30-pin RAM). And overclocking's always fun! Might even get some Counter Strike running on it... badly. At least it's got 64MB of RAM - not too shabby for something so mank-tastic. And about the slot 1 - it only works with PIIs AFAIK. The CPU selection only goes up to 450MHz, though there's some other selection after that which I don't know what it does. I know about the l33tness of overclocking early Celerons - I had my 366 running at 412.5MHz for years! Though I'll need to get a slotket to fit that in there. And you say you have loads of 1 gig slot 1's? Actual slot 1's and not slotkets? Erm, you know they can go for $100+ on eBay?
My old celeron 333 went to 450 on stock, those were the days. I have overclocked a p75 before, but it would only go to 84/86 (or somewhere in the mid 80s). The limiting factor is likely to be the motherboard rather than the chip/heat though, so maybe you could get 100 out of it if your mobos are more solid (and of course you've got a different chip so your mileage will vary anyway). Summer jobs at PC repair places kick ass, I've "collected" so much SD-RAM I have no idea what to do with it. The stuff that gets thrown away is insane, I've rescued celeron 666s before now (now they were mad oc'ers, up to 1ghz no problem). The really annoying thing was that in other departments people were struggling with dying P2 233s, but you can't transfer them over... same with monitors, most of the departments are on 15s when there's a room stacked up to waist height with 17s which have been replaced with flatscreens... bureaucracy...
I wouldn't bother overclocking either, you won't see much difference. And I wouldn't put XP on either - even the 300 would need at least 512Mb of RAM to run anywhere near decently! 75 should do 100, might need cooling yes. Try a FCPGA cooler, it might work. The 300 would probably do 350-366, but I wouldn't go any higher. I never likes PIIs for overclocking. Mind you, my personal view on overclocking is that it sucks. I always like to run my components at their native speed, in warranty. Yes, I know some processors are like 2nd grade rebadged higher CPUs, but so? I need stability for my system over anything else. I did that, btw. Got about 8 RM machines out of a skip at college hehe.
System stability with overclocking is a concern, yes, but if you've got prime 95 et al you really shouldn't have a problem. I'm currently running a P4 2.4c at 3.1, on stock, with no heat issues and certainly no stability issues. I can take it higher and it will work, but in a few tests it'll fail so I take it down again. Stability can be verified In general I advise people who want to overclock, to buy the lowest out of each batch of cpus. For instance the P4 C that I've got is the lowest, and overclocks (proportionally) the highest. It's the same with the Athlon 64s, you get a better proportional overclock out of the lower models. I don't know why I'm going on a value-for-cash rant here, just seemed an appropriate place... RM... hehe, seen a few of them in my time. I hadn't seen new RM PC's for a while, but my uni just bought a tonne of 3ghz P4s with 17" tft's. Very nice, plus they've finally made the migration to XP from 98, about time too.
Oh God, that would be insanity! I think I'll stick to what was already on the PCs - NT4 on the P75 and 2k on the PII, though I'll have to re-install them both because I can't log in on them (they still think they're supposed to be on the UL network!). Though I'll need to put more RAM in the PII - I just realised I had only put 32MB after booting it - Windows 2000 starting with that much RAM was *pain*... I found out my friend has a spare P100 (but in a real cheap piece-o-crap), but I think it was a different socket (socket 7 vs. socket 5). Damn you Intel!! :angry Yeah, I think the Dell motherbaord is too screwy for overclocking anyway. I tried changing the jumpers to like 350MHz, but then the mobo started thinking it was a 266! Weird. No FSB jumpers either... I'm not too bothered if these things die - I've got a feeling the warranty's expired on them, and if they break there's still loads of crap old PCs lurking around UL somewhere! There's about 50 Siemens Nixdorf PII's from the library that were replaced recently, so they have to be somewhere, and there's still some Wangs lurking around the physics labs (being used solely for measuring speed and acceleration from a little trolley thingy), which inevitably have to go some time! RMs! I remember those in my school in England, back when P100s were acceptable. Though they only just got them when I went there so there weren't any being thrown out. I wonder what happened to all their hundreds of Acorns though? I've got a small box full of that stuff too, but it's mostly crap like 16s and 32s. Though over the past few weeks I've actually found enough 1MB 30-pins to upgrade my 386 from 4 to 12MB RAM! It takes ages for the memory test to finish now, even when you skip it!
