VOGONS

Broken pin on 754 3700

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First post, by Trashbytes

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Hi have a bit of an issue trying to identify if a broken pin on this CPU is a required pin a spare voltage pin or not connected, I have the pin maps but with limited experience in deciphering these pin out maps I'm hoping someone here more knowledgeable can lend a hand. Its either a VLDT pin or a Memory channel pin ...assuming Im at least on the right path with reading this map.

I haven't thrown this CPU in a board yet as I dont want to cause it any further damage as these 3700s are rather hard to get hold of, If its a required pin then Im going to go microscope hunting so I can try repairing it .. or I will do a socket mod with a bit of stiff wire.

Apologies about the pics, did my best with the limited macro camera I have.

The attachment AMD Athlon 64 3700 754 2.JPG is no longer available
The attachment AMD Athlon 64 3700 754.JPG is no longer available

Reply 1 of 5, by Nexxen

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https://datasheet.datasheetarchive.com/origin … DSA00417896.pdf

Pin AH1 (NC_AH1), doesn't look like it is connected to anything.

See below.

Last edited by Nexxen on 2024-05-29, 14:13. Edited 1 time in total.

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PC#2 PIII-1Ghz - 98SE/W2K
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Reply 2 of 5, by Trashbytes

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Nexxen wrote on 2024-05-29, 11:45:

https://datasheet.datasheetarchive.com/origin … DSA00417896.pdf

Pin AH1 (NC_AH1), doesn't look like it is connected to anything.

Thanks for that!

Had a good look at that PDf and it helped a bunch, I reorientated the images I posted so that it reads the way the PDF has it and it looks like its possibly the MEMDQS(2) pin, the images I posted here are pretty terrible and Im pretty sure I need to get a better camera.

Ill do a quick post test on it to see if its alive and then likely do a quick pin mod, MEMDQS(2) looks important for DDR.

Reply 3 of 5, by Nexxen

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Trashbytes wrote on 2024-05-29, 12:16:
Thanks for that! […]
Show full quote
Nexxen wrote on 2024-05-29, 11:45:

https://datasheet.datasheetarchive.com/origin … DSA00417896.pdf

Pin AH1 (NC_AH1), doesn't look like it is connected to anything.

Thanks for that!

Had a good look at that PDf and it helped a bunch, I reorientated the images I posted so that it reads the way the PDF has it and it looks like its possibly the MEMDQS(2) pin, the images I posted here are pretty terrible and Im pretty sure I need to get a better camera.

Ill do a quick post test on it to see if its alive and then likely do a quick pin mod, MEMDQS(2) looks important for DDR.

I thought it was a no connect pin.
That's why I posted the pdf. 😀

PC#1 Pentium 233 MMX - 98SE
PC#2 PIII-1Ghz - 98SE/W2K
- "One hates the specialty unobtainium parts, the other laughs in greed listing them under a ridiculous price" - kotel studios
- Bare metal ist krieg.

Reply 4 of 5, by Trashbytes

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Nexxen wrote on 2024-05-29, 14:12:
Trashbytes wrote on 2024-05-29, 12:16:
Thanks for that! […]
Show full quote
Nexxen wrote on 2024-05-29, 11:45:

https://datasheet.datasheetarchive.com/origin … DSA00417896.pdf

Pin AH1 (NC_AH1), doesn't look like it is connected to anything.

Thanks for that!

Had a good look at that PDf and it helped a bunch, I reorientated the images I posted so that it reads the way the PDF has it and it looks like its possibly the MEMDQS(2) pin, the images I posted here are pretty terrible and Im pretty sure I need to get a better camera.

Ill do a quick post test on it to see if its alive and then likely do a quick pin mod, MEMDQS(2) looks important for DDR.

I thought it was a no connect pin.
That's why I posted the pdf. 😀

I was going to go with your initial answer, but thought I should triple check things anyway.

Reply 5 of 5, by weedeewee

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funny, considering it mentions top view under the pinout in the pdf, I would think it's VLDT0_A (B 29)
scrap that

AJ2 MEMDQS(2) seems more correct.

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