RAM increase

[Alex23]

Hello,

My MacBook Pro has 2 x 2GB of DDR3 at 1067 MHz speed each.
I was thinking of replacing one of the both by a 4GB DDR3 at the same speed or 1333 MHz to have a total of 6GB.

The apple technical specifications for my mac sais:
2GB (two 1GB SO-DIMMs) or 4GB (two 2GB SO-DIMMs) of 1066MHz DDR3 SDRAM; two SO-DIMM slots support up to 4GB

That means that I can put 2x 4GB ?

What are the compatibility I should look out for besides the memory socket type SO-DIMM ?

Would this model work http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=7101495&CatId=4153

Thanks for reading !

 

[alust2013]

Definitely don't try to mix 1067 and 1333. That usually won't go well. You need PC3-8500, unless you want to replace both chips.

 

[simsaladimbamba]

Definitely don't try to mix 1067 and 1333. That usually won't go well. You need PC3-8500, unless you want to replace both chips.

I just realised, that this is what I have done. I have a 2GB 1067MHz module and a 4GB 1333MHz in my 2009 17" MBP and it works without a hiccup. The 1333MHz RAM module is from CnMemory. Hmm.

Upgrading RAM in MacBooks and MacBook Pros​

 

[alust2013]

I just realised, that this is what I have done. I have a 2GB 1067MHz module and a 4GB 1333MHz in my 2009 17" MBP and it works without a hiccup. The 1333MHz RAM module is from CnMemory. Hmm.

Upgrading RAM in MacBooks and MacBook Pros​

interesting. It must have just downclocked the 1333 to 1067. Either way, you run a greater risk of it not working together if they are different speeds, as they can have different timings and latencies, etc.

 

[Alex23]

Definitely don't try to mix 1067 and 1333. That usually won't go well. You need PC3-8500, unless you want to replace both chips.

What does it mean PC3-8500 ?

Would that be ok ?
http://www.canadacomputers.com/prod...item_id=036583&sid=dp4m6bitfo7m2tsuia6qv9pa83

Is this brand recommendable ?

What are the risks in % if I could say of having 2 Ram of different speeds ? Would it be very recommendable to just invest extra and get two same RAM bars of 4Gb ?

Thanks for your advice man, you're saving me lots of trouble.