They aren't in any way compatibile. The slots in the chip itself won't line up with the slots on the motherboard. I tried once to use a 32 MB PC66 SDRAM DIMM in a 7200 by cutting the slot wide enough to fit, but it wasn't recognized.
They are different physically, and electrically. Too much to function in that particular capacity, anyway.
I lucked out and bought an in-pieces 9500 with 128+ MB RAM for $100 with a video card, etc.. I am a happy boy now.. Might try out that cut DIMM for laffs, though..
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