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>> The 750CE uses a 486DX2. As does the 755 series. But the 750CE is an > >No. The 755 uses the DX-4. > >Sorry, misprint. I _had_ a 750C, but I replaced it with a 755C. The 755C >has either a DX4-50 or a DX4-75. I purchased the DX4-75 which were rare at >the time. I was originally approached by IBM to purchase the DX4-50 laptop, >and they would just replace the chip with a DX4-75. Whoa, the TP755 can use a DX2/50 (not a DX4/5) or a DX4/75, right? Is there such a beast as a DX4/50? If so, why? >This implied to me that the chip is socketed, and that the motherboard >somehow autosenses which chip is socketed. One of the selling points of the >DX-50 laptop was that you could upgrade it someday to a DX4-75 by merely >dropping in a new chip. Can the same motherboard handle the DX4/100 (since it's a different frequency)? --- Sean Chou / schou@uiuc.edu / CompuServe 73672,2111