Post #4058559
2026-07-24 00:44 UTC
Four new-old-stock Amp 916557-3 ZIF PGA sockets, "Socket 7", for Pentium 75 MHz and up, Pentium MMX, AMD K5, K6, and others.
One of the four, lower right in photo, is missing a portion of the top plastic, but I don't think that will affect its usage.
Replies (1)
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@brouhaha@mastodon.social 2026-07-24 01:38
Socket 7 and the Pentium MMX (P55C) define one pin, Vcc2DET to indicate whether the CPU uses a single supply (P54C), or separate supplies Vcc2 for core and Vcc3 for pins (P55C). Unfortunately, that doesn't tell the motherboard what the correct two voltages are, even when a VRM module is used, so some confuguration is still needed. AMD defined a second pin, Vcc2H/L# to distinguish between two Vcc2 choices, but it still wasn't really sufficient.