On Oct 16, 2010, at 10:01 AM, Mac User #330250 wrote:
I don't get this.
Is the board the same or is it not?
The "raw" board is the same.
The "stuffed" board is quite different.
There are places for two voltage regulator systems. The 800 MHz uses
one regulator system, the 1000 MHz uses another regulator system.
I sometimes read that the QS2002 Single-800 MHz board is supported
by various
processor upgrades, but the Dual-QS2002 boards are not. Why is that?
What do you mean by “stuffed”?
Stuffed is a "word of art" for the process of picking and placing
discrete components onto the raw board, usually by automatic machine.
Do I get this right: chips that are not soldered onto the board
maybe? – And
these chips are different comparing the Single-800 and the
Dual-1000 model?
All components are reflow-soldered.
By “divert” you mean to put a QS2002 800 MHz CPU into a QS2002 Dual
board? Why
should this not be possible, when the opposite is possible?
Divert means to change its function or performance, from one level to
another.
The way Apple designed the dual 800 and dual 1000 board, although
using the same raw board, it is not possible to speed up (change from
800 to 1000) for down speed (change from 1000 to 800) a processor card.
On uniprocessors, it is sometimes possible to change the speed
through adjustment of certain jumpers, which usually means removing
or adding a resistor, possible a "zero ohm" resistor (i.e., a jumper).
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