60 MHz
273-pin ceramic Pin Grid Array
Pentium 60 MHz microprocessor was the first from Pentium series, and it was the slowest one. The CPU was shipped in pin grid array package similar to 80486 - the CPU bottom side looked like a bigger version of 80486. Like older 80486 processors, the Pentium 60 required 5 Volt. High core voltage and big die size were the primary reasons of the processor running very hot even with factory supplied heatsink. Short term fix for this problem was adding an integrated heatspreader that helped to dissipate the heat (see other pictures). The heat problem was solved in the next generation of Pentium chips by switching from 0.8 micron to 0.6 micron manufacturing process, and reducing core voltage to 3.3 Volt.
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