in other words: one in black, one in blue
Actually, it is not correct, 1 and 2 match your rule, but not double ddr.
I tested my two sticks of PC2100 memory in 1,3 also in 2,3. I found out that I can only go as high as 163 FSB with 1,3, but I can go as high as 166FSB with 2,3 with no Prime95 error in 10 hours.
So, the two blue choice is much better on my system, and it is double ddr too.
