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PostPosted: Wed Dec 30, 2020 8:44 pm 

Joined: Fri Dec 22, 2017 1:27 pm
Posts: 29
With the gold tab being worth a lot more than a flat pack without a gold tab is there any difference in the boards with or without a gold tab on the flat pack. I have a lot of boards from tv receiver boxes and video game boxes. Most of them have at least 2 flat packs on them. I was wondering if there is a difference in grading them because of the flat packs.
TY
Joe


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PostPosted: Wed Dec 30, 2020 10:12 pm 
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Joined: Tue Feb 03, 2015 6:57 pm
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TLDR: Board itself? No generally.

First; flat pack is in the generic usage, which includes both true flat packs and just about any ball grid or surface mount integrated circuit package.

The tab indicates a multi-unit package. That is anything from processors on the better end to FPUs to scalers to ... !

Go way back to understand the pricing on the chips.
Take the Atari 2600 (original woody and Vader). No “tabbed flat packs”. All the chips are individual processing units. Then just a short time later the “trim” models were released. With 8 less chips because they used some MCCs to combine chips and reduce total count (and cost).
Early digital cable boxes had separate A:D-C and D:A-C chips. Neither with tabs (both rectangles). That was replaced with an ADC package (quad flat pack with leads or QFP) with a tab (a square). Two chips in one. That was later replaced with more common BGAFCs (green squares that look like pinless CPUs) that Chris also take as flat packs.

So in reality the gold tab chips don’t do much in changing the value of any one board. The same raw materials are used to make it. And some of the extraneous value is actually lost in reducing to flat packs.
It’s this reduction that helps explain why old DIP motherboards go as large socket, or better.

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-- my grades are my own and do not represent an offer from boardsort, nor are they guaranteed. Please keep that in mind.


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