From: Gary Udstrand (gbu_at_uhc.com)
Date: Fri Dec 09 1994 - 00:35:05 EST
The 755 takes a small daughtercard, I have a 755 that is 50 Mhz and is
shortly going to be upgraded to 75Mhz. The 755 is the only CPU upgradeable
ThinkPad I believe.
At 06:54 PM 12/8/94 -0500, jokim_at_mit.edu wrote:
>In message Thu, 8 Dec 94 12:46:33 PST,
> george_at_cs.nps.navy.mil (Robert George) writes:
>
>>> > Can we use any Intel upgrade chip to bring this CPU up.
>>>
>>> I believe the TP750 CPUs, even the CE, are not socketed.
>>
>> I'm pretty sure the 750C's are socketed. They are available as a 50Mhz,
>> or a 75Mhz 486 with the same motherboard. I was told by IBM tech support
>> that the upgrade consisted of replacing a socketed cpu.
>
>Now wait a second. The TP750, 750CS and 750C all use the Intel 486SL/33
>CPU which has been discontinued. Even if it were socketed, I doubt a 486DX
>would fit in its place - the SL has some functions built into it that are
>missing on the DX/SX.
>
>The 750CE uses a 486DX2. As does the 755 series. But the 750CE is an
>earlier incarnation of the 755 (and predates the DX4), so I'm not sure the
>CPU is socketed. The 755 series *is* socketed. At least that's what I was
>told when I asked IBM soon after it was introduced.
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Advanced Technology _/ _/ _/_/_/_/ _/ Fax: (612) 945-6502
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