I have a IBM 30oPL 6862 Pentium III 550Mhz Slot 1 CPU 640MB Ram and was wondering about the Max Pentium III I could put into it I would like to try and get as close to a 1Ghz Socket 1 Pentium III as possible?
Here is some info:
https://ancientelectronics.wordpress.com/2020 … l300-type-6862/
The sticker on the underside of the case lid gives switch positions for installing a Pentium III up to 550MHz but with an update to the latest BIOS I was able to successfully upgrade the CPU to an 800MHz Pentium III and using a Power Leap adapter was even able to install a 1.3GHz Tualatin. A few things to note however is I found the switch settings useless when upgrading the CPU and when I changed them from what was the systems default I even ran into POST errors. I suspect this may be an issue caused by the BIOS update which changes how CPU speed is handled. I did however run into a separate POST error after changing CPU’s that I had to go into the BIOS advanced features menu and disable “CPU BIOS update”.
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kixs wrote on 2021-12-13, 14:48:Here is some info:
https://ancientelectronics.wordpress.com/2020 … l300-type-6862/The sticker on the underside of the case lid gives switch positions for installing a Pentium III up to 550MHz but with an update to the latest BIOS I was able to successfully upgrade the CPU to an 800MHz Pentium III and using a Power Leap adapter was even able to install a 1.3GHz Tualatin. A few things to note however is I found the switch settings useless when upgrading the CPU and when I changed them from what was the systems default I even ran into POST errors. I suspect this may be an issue caused by the BIOS update which changes how CPU speed is handled. I did however run into a separate POST error after changing CPU’s that I had to go into the BIOS advanced features menu and disable “CPU BIOS update”.
I already checked and as far as I can tell mine is fully updated though kind of hard to find info on what the last Update for these bios's was now a days.
I used a Celeron-1400 on a Lin-Lin adapter mounted to a passive slocket in one of those machines. The BIOS sure didn't know what to make of that CPU, but that didn't stop it from booting and working beautifully. All benchmark results were up to par, and the system was 100% stable.
-It also worked with a PIII-1000 and 1200, although at a reduced speed due to the motherboard's 100MHz bus limit.
-It wouldn't work with any PIII-S processor (even though Tualatin-256 CPUs like the Celeron-1400 and PIII-1200 were OK). I tried a 1.26-S and 1.4-S, both of which locked up at the IBM logo screen.
"A little sign-in here, a touch of WiFi there..."
Standard Def Steve wrote on 2021-12-13, 16:29:The BIOS sure didn't know what to make of that CPU, but that didn't stop it from booting and working beautifully. All benchmark results were up to par, and the system was 100% stable.
That's close to miraculous on an IBM machine, they're usually all like "boop boop boop, alien technology detected, boop boop boop please file reports in triplicate to our NY and CA headquarters, boop boop boop...." 🤣
No really, a lot of earlier models worked with a narrow range of CPUs, I think we'd call it a whitelist these days, and refused anything else.
edit: ( a bit of a by the way, I think that's why those PS/2 CPU upgrade boards were so "componenty" they didn't just have to interface the CPU, they had to mask it through the BIOS checks until the interrupt handing over to the OS triggered and they could switch to full speed. I know a number of PS/2 systems are BIOS locked to supplied CPU)
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.
Standard Def Steve wrote on 2021-12-13, 16:29:I used a Celeron-1400 on a Lin-Lin adapter mounted to a passive slocket in one of those machines. The BIOS sure didn't know what to make of that CPU, but that didn't stop it from booting and working beautifully. All benchmark results were up to par, and the system was 100% stable.
-It also worked with a PIII-1000 and 1200, although at a reduced speed due to the motherboard's 100MHz bus limit.
-It wouldn't work with any PIII-S processor (even though Tualatin-256 CPUs like the Celeron-1400 and PIII-1200 were OK). I tried a 1.26-S and 1.4-S, both of which locked up at the IBM logo screen.
Would this one work Intel Pentium III P3 Slot 1 1000Mhz 100FSB 1.7v SL4KL CPU? I found one on ebay.
thegenerallee86 wrote on 2021-12-14, 13:53:Would this one work Intel Pentium III P3 Slot 1 1000Mhz 100FSB 1.7v SL4KL CPU? I found one on ebay.
That will totally work in the PC300PL. If you can get it for a reasonable price, go for it! The 1GHz /FSB100 in Slot 1 form is actually quite rare and usually pretty expensive.
BitWrangler wrote on 2021-12-13, 17:09:That's close to miraculous on an IBM machine, they're usually all like "boop boop boop, alien technology detected, boop boop boop please file reports in triplicate to our NY and CA headquarters, boop boop boop...." 🤣
😀 Yep! I was definitely surprised when all I had to do was set the BIOS to ignore the unknown CPU. I have an old Deskpro 4000 that's far more picky when it comes to CPUs. It'll only take 233, 266 and 300MHz PIIs. Slot in anything faster, and it will disable the L2. It's based off of a really old motherboard design though. There's a 1996 copyright date on the board, it uses EDO memory, has no USB, and no soft-off. Basically a Pentium Pro board with a Slot 1 connector. Windows even recognizes the PII-233 as a Pentium Pro!
"A little sign-in here, a touch of WiFi there..."
Standard Def Steve wrote on 2021-12-14, 22:01:That will totally work in the PC300PL. If you can get it for a reasonable price, go for it! The 1GHz /FSB100 in Slot 1 form is a […]
thegenerallee86 wrote on 2021-12-14, 13:53:Would this one work Intel Pentium III P3 Slot 1 1000Mhz 100FSB 1.7v SL4KL CPU? I found one on ebay.
That will totally work in the PC300PL. If you can get it for a reasonable price, go for it! The 1GHz /FSB100 in Slot 1 form is actually quite rare and usually pretty expensive.
BitWrangler wrote on 2021-12-13, 17:09:That's close to miraculous on an IBM machine, they're usually all like "boop boop boop, alien technology detected, boop boop boop please file reports in triplicate to our NY and CA headquarters, boop boop boop...." 🤣
😀 Yep! I was definitely surprised when all I had to do was set the BIOS to ignore the unknown CPU. I have an old Deskpro 4000 that's far more picky when it comes to CPUs. It'll only take 233, 266 and 300MHz PIIs. Slot in anything faster, and it will disable the L2. It's based off of a really old motherboard design though. There's a 1996 copyright date on the board, it uses EDO memory, has no USB, and no soft-off. Basically a Pentium Pro board with a Slot 1 connector. Windows even recognizes the PII-233 as a Pentium Pro!
What would you consider a reasonable price?
