DDR2: dual or single channel?

[Chalky Emultion]

I'm upgrading the RAM on my P5Q Pro motherboard... Right now I have 3 GB total, 1 GB on slot 2 and 2GB on slot 4 running in dual channel mode.

Today I ordered a new 2GB stick. So I'll have 3 sticks of RAM on my motherboard, for a total of 5GB.

Considering that I will run 2+2GB in dual channel mode, if I add the third 1GB stick to the motherboard, will my RAM run in dual channel mode?

What is better in terms of performance? only 2+2GB or 2+2+1GB?

 

[logicearth]

Those two 2GB sticks will run in dual channel if you install them in the correct slots, usually the same color. Adding the 1GB stick will not harm this.

 

[AddRAM]

Your motherboard manual should have the layout.

http://www.asus.com/Motherboard/P5Q_PRO/#support_Download_30

 

[ICIT2LOL]

Best check the slots mate as I found my Asus P8Z77 the slots were not the closest to the CPU rather the furthest away which suprised me a bit. So looking at the board that would be the black slots.

Personally I would go (if you can afford it) 8GB and with a matched pair (kit)

 

[Chalky Emultion]

Ok, thank you for your answers