2GB x 2 and 1GB x 2 at the same time?

[BKost]

I recently bought an Acer C720 with 2GB of SDRAM. I noticed it has two open BGA slots, and two full with the 1GB modules. I'm not very comfortable removing BGA modules and affixing new ones, but I am comfortable enough to add two new modules. If I were to add two 2GB modules to the open slots, would I have 6GB of usable memory or just 4GB?

While I'm at it, does anyone know of a good place to buy BGA memory? Haven't had much success yet.

 

[John Connor]

Some motherboards can be stubborn on what kind of RAM capacity sticks you use in the RAM slots. My current Dell laptop has a 2 GB stick and a 1 GB stick and it works. As for where you can buy BGA memory, have you tried eBay?

 

[Cerb]

I recently bought an Acer C720 with 2GB of SDRAM. I noticed it has two open BGA slots, and two full with the 1GB modules. I'm not very comfortable removing BGA modules and affixing new ones, but I am comfortable enough to add two new modules. If I were to add two 2GB modules to the open slots, would I have 6GB of usable memory or just 4GB?

While I'm at it, does anyone know of a good place to buy BGA memory? Haven't had much success yet.

I seriously doubt you can do that. Chances are it would only work the same chips as are making it 2GB, even if you could get new chips soldered in.

 

[BKost]

Some motherboards can be stubborn on what kind of RAM capacity sticks you use in the RAM slots. My current Dell laptop has a 2 GB stick and a 1 GB stick and it works. As for where you can buy BGA memory, have you tried eBay?

Seems like I need to find some kind of documentation for my motherboard or talk to someone who has experience with it.

Haven't tried eBay yet, but I did find what I need on AliExpress.

I seriously doubt you can do that. Chances are it would only work the same chips as are making it 2GB, even if you could get new chips soldered in.

Assuming I need to have four of the same chip for it to work, why couldn't I just add two more of the exact same 1GB chips and have 4GB total? Why do you think I won't be able to solder new chips in?

I appreciate the response, I'd just like to understand your reasoning better.