I will start with a very old platform - socket 7 - but a long-life platform, maybe one of the longest:
a) below is k6 III 400@475 MHz, 250nm on a Soyo 5EHM+ 1MB L2 cahe MVP3 motherboard, usually these CPU can cope with maximum 450 MHz at stock voltage + 0.1V;
b) the 256 kb L2 cache inside the CPU are more important than the frequency, the additional performance compared to simple k6-2 - clock per clock - is around 20%, a k6 III at 450 MHz is movind better than a k6-2 at 600 MHz;
c) it is the last time Intel made the "mistake" they will never repeat: they licensed the socket to AMD, and it is well known what happened later, Pentium1 MMX stopped to 233MHZ - followed by Penium II, and AMD reached with K6-2 si k6-2+ frequencies of 600 MHz (official k6-2 570 MHz k6-2 and 550MHz for k6-2+) - competing with Intel's Pentium II, but 600MHz is an usual frequency for good super socket 7 motherboards with FSB > 100 MHz and K6-2+, k6-3+;
d) the multiplier is unlocked, and from k6-2 CXT - chomper, the AMD CPUs are considering the 2x multiplier - 6x;
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