Upgrading Ram Question

[meepins]

Hi guys currently I'm trying to upgrade my RAM.

I currently have

MSI 865PE Neo2 Mobo
- Supports Dual Channel DDR 400/333/266 memory interface.

Intel 2.8 Ghz
256 x 2 DDR PC3200 OCZ Ram (Dual Channel)
eVGA 6600GT 128mb

I want to upgrade my RAM, I'm planning on adding 512 x 2 DDR PC3200 to make it 1.5gb of Ram.
But I've heard that having different memory of RAM as Dual Channel is unstable.
So should I just buy 512 x 2 DDR PC3200 and replace my 256 x 2 DDR OCZ? Or adding it up to make 1.5gig is still stable?

And is there any other specs I need to worry about (matching) when buying Dual Channel Ram?

Thanks!

 

[Powerslave]

Buy 1 gig of ram in the same series as that and run it all in dual channel, it doesn't have to be 2.256 it can be 2.512 but make sure it's the same series or brand at least.

 

[FghtinIrshNvrDi]

if you have 4 slots, then 2x256 and 2x512 will still run in dual channel, providing they are all in the correct corresponding slots. That's exactly what I'm doing right now in my PC

Ryan