RAM compatibility question

thanks ppl
a rapid learning experience !
Any idea how your original RAM was replaced? Perhaps you upgraded it thinking there would be an improvement? Perhaps one failed?
 
So I'm giving an ancient MacBook Pro to a friend.
The machine was relegated to the back of a top shelf in a cupboard years and years back.

Its an old 2010 machine - with an i7 2,66 GHz processor & 500GB SSD drive
It only has 4GB RAM

The RAM is 2 x 2GB 1067MHz DDR3L - see pic below.
View attachment 1703261

Despite it's age, it still performs extraordinarily well.
I would however like to upgrade the RAM before I give it away.

Are these compatible with this old machine ?
View attachment 1703265

View attachment 1703267
RAM is nice and all but in my experience biggest bang for buck would be replacing HDD with SSD.
 
and so it continues.
i managed to get my hands on a matching pair of 4bg chips - same spec as original, except capacity.

so in the pic, the upper chip is one of the original identical 2gb pair.
the lower chip is one of the identical 4gb pair.

IMG_20240508_212445_edit_125185960639230.jpg

if i install both 4gb chip, the machine gets stuck in a reboot cycle.
swapping the chips around in the ram slots results in the same reboot loop.

if i install chip "a" on its own into either ram slot, the machine boots, and confirms 4gb present.
if i install chip "b" on its own into either ram slot, the machine goes into a reboot cycle.

if i install chip "a" into one ram slot, plus an original 2gb chip into the other slot, the machine boots and confirms 6gb present.
if i install chip "b" into either ram slot plus an original 2gb chip into the other slot, the machine is back to the reboot loop.

given this process of elimination, would it be safe to assume chip "b" is faulty ?
 
and so it continues.
i managed to get my hands on a matching pair of 4bg chips - same spec as original, except capacity.

so in the pic, the upper chip is one of the original identical 2gb pair.
the lower chip is one of the identical 4gb pair.

View attachment 1705879

if i install both 4gb chip, the machine gets stuck in a reboot cycle.
swapping the chips around in the ram slots results in the same reboot loop.

if i install chip "a" on its own into either ram slot, the machine boots, and confirms 4gb present.
if i install chip "b" on its own into either ram slot, the machine goes into a reboot cycle.

if i install chip "a" into one ram slot, plus an original 2gb chip into the other slot, the machine boots and confirms 6gb present.
if i install chip "b" into either ram slot plus an original 2gb chip into the other slot, the machine is back to the reboot loop.

given this process of elimination, would it be safe to assume chip "b" is faulty ?
I would say yes. Every time you use b it breaks
 
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