I am wotking with photoshop, 3ds max, Poser. after reading this: The 8GB/64-bit advantage - More RAM doesn't always mean better performance | ZDNet
Accoring the their opinion "More RAM doesn't always mean better performance", But with photoshop their conclution is " Photoshop speed test clearly showed that the more RAM you have, the faster you get your work done."
So I decide to add more memory, but not sure which combination is best for me. I already have 2+2, If I add another 4, in future I will add another 4 gb which makes my total memory 12gb.
No triple channel for you since your signature says Core i3, you have two options ->
a. Dual channel memory --> 2+2 OR 2+2 + 2+2 (you need to buy couple of 2 gb sticks, preferably same as the ones you already have) (the more perfectly matched they are, the better it is)
b. No dual channel memory --> 2+2 + 4 (+4).
The first option will give you more performance and speed, total memory of 8 GB
The second option will give you more memory space, 12 GB --> more application running simultaneously.
So, its up to you really...I dont know about Photoshop/Maya/3DMax/Matlab etc...
but are you going to run a lot of memory eating apps at the same time so much that you need 12 GB of memory space or can you make do with 8 GB?
If you can make do with 8 GB, I did suggest selling the 4GB stick and going with the first option since that gives you better performance.
I might be wrong though, I am no expert.