Not necessarily.
The original retention mechanism in Slot 1 was different than that in later
SECC2 versions. It may be possible to replace the retention mechanism,
although it would involve removing the mainboard from the case. It may also
be possible to ignore the retention mechanism, although the CPU wouldn't be
locked down.
Also, older Slot 1 mainboards may not be electrically compatible with newer
CPUs. An old 440LX mainboard would not normally support the 100 MHz or 133
MHz FSB (front side bus) needed for newer CPUs. It also might have trouble
producing the proper core voltage for a "Coppermine" PIII, and it would
probably not recognize the CPU correctly.
It's sometimes possible to do things that aren't officially supported. For
example: about five years ago, I sold a co-worker a 700 MHz Coppermine PIII.
He got it working in a Dell machine that used a variant of the Intel SE440BX
"Seattle" mainboard. (The fastest CPU officially supported by the board was
a 450 MHz PIII.) He replaced the retention mechanism and found a BIOS for
the machine that supported the Coppemine CPUs, and claimed that it sped up
his MP3 encoding by a factor of 2 over the Deschutes 450 MHz PII that had
been in the machine. For a time I ran a 1 GHz PIII with a 133 MHz FSB in an
old 440BX system that didn't support the FSB. (The AGP slot frequency went
to 89 MHz, but the graphics card worked OK with that. The PCI bus had a /4
divider on that board, so it wasn't run out of spec.)
I regret that I don't have links for references to all this. The information
may be available at
www.intel.com, but it may not be easy to find.
Good luck.
Bob Knowlden
Address may be scrambled. Replace nkbob with bobkn.