Best 4GB RAM for Macbook Pro 13"?

[seong]

Sorry, I'm not the type that asks questions like this, but since I live in Japan, any sort of international shipping will cost extra $40, which could be worth 2GB of RAM. Anyways, what are best RAMs for Macbook Pro 13"? I would like to ask for any amazon links (it's doesn't have to be from amazon.co.jp, because some of them are available in Amazon Japan. I can re-search for those RAMs.)

 

[simsaladimbamba]

The Unibody MacBook Pros use Intel's Core 2 Duo and Dual Core iX CPUs and all models use and accept 204-pin 1066 MHz PC3-8500 DDR3 SO-DIMM SDRAM and in some cases even 204-pin 1333 MHz PC3-10600 SO-DIMM DDR3 SDRAM.

from

Upgrading RAM in MacBooks and MacBook Pros​

 

[seong]

Upgrading RAM to 4GB

Just like the title says, is it better to have two 2GB RAM or one 4GB RAM? I was thinking that if I had one 4GB RAM, then when the time comes, I would just buy another 4GB RAM, and put it in the second slot. Any reasons not to?

 

[seong]

I know THAT far, but I would like to see some recommendations.

 

[fat jez]

A single 4GB DIMM will mean your CPU is running in single channel mode, which will cost you some performance.

 

[seong]

Thanks for a real quick response fat jez!
I should have figured that out by myself.

 

[seong]

I found out that Amazon Japan doesn't have any of the Crucial RAMs in stock, so I'm left with these two for now. Which one is the better one?

http://www.amazon.co.jp/シー・エフ・デー販売-...1_6?s=computers&ie=UTF8&qid=1310549082&sr=1-6

http://www.amazon.co.jp/BUFFALO-ノート...84?s=computers&ie=UTF8&qid=1310549113&sr=1-84

 

[fat jez]

From the little I could work out (my Japanese is non-existent ), either should be fine, although neither would be my first choice.

 

[hekokimushi]

http://cgi.ebay.co.uk/NEW-Apple-OEM...ing_Apple_Mac_Accessories&hash=item2eb63a3d40

http://cgi.ebay.co.uk/Apple-Memory-...ing_Apple_Mac_Accessories&hash=item2eb638b239

Here you go... Ships to Japan..