You are talking crazy Japanese basement engineer hard to do, may not even be possible at all, Daystar (clever monkeys who solder new processors onto powerbook logic boards) tried it on a Pismo and couldn't do it.
Registered: 11/15/07
Posts: 1797
Loc: Florida, USA
Theres more to soldering chips. You have to edit the video's firmware to see the extra ram. Too bad with all of the neat kernel add-ons over the years that some one hasn't made a kernel module to make the system use shared memory for video.
The reason chips are so hard to solder on is because they are not soldered at all. What I mean is that the entire board is heated before chips are added. This is all done by machine which is much better at stuff like that than stubby handed humans.
Registered: 11/15/07
Posts: 1797
Loc: Florida, USA
A human sets most of the components onto a PCB board. The PCB board goes over molted solder just low enough for the connection points for the components. Then a robot like hand puts the components like microchips and stuff that would be a real pain for a human to do on the PCB board and puts it into a oven so the solder to re-melt enough to grab the components. I saw this on How It's Made on the discovery channel lol.
I unsoldered the VRAM from a G3 iBook the other day. I was trying to reflow the GPU package, but nevermind.
Totally melted the GPUs BGA PCB. When I pulled off the VRAM, the solder balls had run into each other in lots of places. I guuess I could clean it up and attempt to re-attach, but like I say I melted the PCB the whole GPU setup was mounted on. You can see it sagging in the middle. Thats what happens when you are impatient.
I have a pile of these things with dead video. Took me three attempts to learn to be patient enough, but I have got one working now......
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