Socket 3 pinout help \ VOGONS

Socket 3 pinout help

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First post, by tony359

Posted on 2021-02-08, 22:08

tony359 Offline

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Joined: 2021-02-07, 16:41

Hello all

I was wondering if someone could help me with the pinout of a Socket 3. I am a bit confused by the schematics I find online.

Can someone confirm which side should I see the attached pinout diagram please? Processor side or back of the board side?

Also, is it ok to find 5V on Socket 3 even though the VCC is set to 3.3V? What I mean is: I see 3.3V on VCC pins but also 5V on many other pins. Would that work with my DX4 CPU?

Thank you a lot!
Tony

My Youtube channel: https://www.youtube.com/@tony359

Reply 1 of 2, by mpe

Posted on 2021-02-08, 22:33

mpe Offline

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Joined: 2018-06-12, 21:19
Location: London, UK

DX4 is a 3.3V CPU. Thus you should see 3.3V between VCC and VSS pins but it obviously operates in 5V environment as the rest of the motherboard is 5V. Thus you'll see 5V voltage elsewhere.

Your scheme seems to be for a socket. It has way more pins than the 486 CPU as outermost pins are for Pentium Overdrive (P24T pinout). Furthermore you won't probably find most of these "plug" pins on any real socket. That's why the scheme might be confusing

I personally prefer this scheme:

Intel DX4-WB.jpg

Which is the orientation you get when you look from top or if you place PGA168/169 CPU to the Socket 3:

DSC_9099.jpeg

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