@scarlett7447
Are all 4 gigs usable though? I might be wrong, but I think Intel chipsets of the time only allowed you to use 3 — it was indeed 4 in "About this Mac", but in top/System Monitor you could see that system could only address 3 gigabytes.
@m0xee oh this one can address 6 no problem lol I just don't have a 4gb module