I need to rebuild my computer but my instruction manual is confusing. They say I can install RAM (in my case DDR-400) so that:

DIMM_1a+DIMM_2a = DIMM_2b + DIMM_2b

To me, this means I can do 2x512 on Channel A and 1x1024 on Channel B. But the general online populous seem to believe that it can't be done this way. Whats the truth?

Some additional info: I originally had 2x Corsair CMX512-3200XL with timings 2-2-2-5. I received a single stick of Corsair CMX1024-3200C2 with timings 2-3-3-6 (I know with this configuration, if it were to work, would be slower than the original timings). I believe the CL to be identical.

Will the configuration mentioned above work with an Asus A8N32-SLI Deluxe?