i know this is probably a really dumb question but, will i be able to install a:ATI Radeon X1600XT Graphics adapter - 256 MB - GDDR3 SDRAM on my macbook?
Doubt it.
RAM and HDD replacements are the "average limits" to customization. Some replacements such as LCD display and keyboard can be done with a level of difficulty. My understanding is anything attached to the "motherboard" is an unlikely modification.
Did you try to Google the subject or look at sites like iFixIt?
i know this is probably a really dumb question but, will i be able to install a:ATI Radeon X1600XT Graphics adapter - 256 MB - GDDR3 SDRAM on my macbook?
The GPU is surfaced mounted on the logic board. The likelihood of being able to remove it and replace it with a different one is probably slim to none. And even if you could do it, it probably would not work due to the chipset difference.
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