Inconsistence?

[IJK_Principle]

Good day to you all,

I believe there is some inconsistence in my motherboard's manual. Please take look at these two pictures:

http://img214.imageshack.us/img214/6890/asusmemory1uj9.png
http://img120.imageshack.us/img120/5811/asusmemory2bes0.png

They are snippets from the manual and I believe that statement #1 and #2 on the second picture contradict each other.

I'm pretty sure that statement #1 is simply nonsensical - it says that total size of memory per channel must be the same, that is true, however it also says that A1 + B1 = A2 + B2.

It should really be A1+A2 = B1+B2, am I right?

Thanks.

 

[o1die]

The manual is correct. The identical pairs must be installed in the same color coded slots. One pair in the yellow slots; the other in the black slots.

 

[IJK_Principle]

But then their formula wouldn't work:

A1 + B1 = A1 + B2


if the letters determine the channel and the number the color and bank - then the real formula should be A1+A2 = B1+B2, no?

Say you install two 1 GB DIMMs in the yellow color sockets - both channels have the same ammount of memory.
Then you buy two 512 MB DIMMs and you install them in the black sockets. After that the first channel has 1 Gig + 512 MB (first yellow socket and first black socket) and the second channel has the same combination - 1 GB + 512 MB (second yellow socket and second black socket)

So whose formula is correct? Mine or the one from manual?

 

[o1die]

I've tried mixing different size memory sticks in the same color coded slots. They may work, but not in dual channel mode. However, you can put 2 512 sticks in the yellow, and 2 1 gig in the dark slots, and you should be still running in dual channel mode. And you may be right; sometimes the board manual has a misprint.