When adding memory does it have to be the same?

[OmegaShadow]

I'm thinking of adding another 2gb to my current 2gb memory. I have 2gb corsair 667. If I want to upgrade does the new memory I add have to be also 667?

 

[Ratman6161]

I have gotten away with using mismatched pairs a couple of times. But it can be a matter of luck. Your best chance for success will always be with all modules matching.

I'm not familiar with your mother board and am too lazy to look it up. Is that a socket 939 or an AM2 4600+. My experience with 4 dimms on socket 939 was mixed. I've tried it on two motherboards. One was a Foxconn board with an nVidia 6150 chipset and in worked great with 4 dimms. The other was a Foxconn nForce 4 Ultra board that ran fine with 2 dims but with 4 the memory had to be set for ddr266 or slower to be stable - even when not overclocking.

FYI it was the same 4 dimms that worked fine in the 6150 board that had to be underclocked to work on the nForce 4 ultra board.

So its a mixed bag.

 

[OmegaShadow]

i see, so it's better if i just get the same speed, to be safe.

it won't matter what brand right? i have 2x 1gb 667 corsair, and right now i'm going to get 2x1gb OCZ 667 because it's crazy cheap on ncix.

http://www.ncix.com/products/i...sku=24444&promoid=1061

 

[DSF]

That's SO-DIMM memory, it's made to fit laptops. It won't work in a desktop.

Given what Ratman said, I would do some research on your board and find out how it behaves with all four RAM slots populated. If things don't look good, you could always sell your existing RAM (or keep it as a backup) and buy a new 2x2GB kit.

 

[OmegaShadow]

Ahh, that just shows how new I am to this memory upgrading thing lol. Thanks for letting me know.

I searched up my motherboard and this is my motherboard.

http://www.ncix.com/products/i...0HDMI&manufacture=ASUS

This is what it says for the Memory

Dual channel memory architecture
4 x 240-pin DIMM, support max. 8GB DDR2 800/667/533 ECC and Non-ECC,un-buffered memory




and I googled up this review

http://www.hardwaresecrets.com/article/432

This motherboard has four DDR2-DIMM sockets, accepting up to 8 GB of DDR2-400/667/800 memory. Two sockets are yellow and the other two are black. To use dual channel feature you need to install the memory modules on modules with the same color.

found another review too http://www.techpowerup.com/reviews/ASUS/M2A-VM


but none of them tell me how my mobo performs with all 4 memory slots filled.