memory - Installing 3 DDR2 sticks - which of the 4 slots to populate?

First of all, I have the Asus M4A87D-M PRO motherboard.

And I have now two identical Apacer 2GB PC-6400 CL5 800Mhz sticks installed. I am going to buy a Transcend JetRAM 2GB PC2-6400 CL6 800Mhz stick.

How do I put all the 3 ddr2 dimms in the slots shown above so they will be stable and there won't be memory channel conflicts?

Answer

The answer is YES

BUT

Do not install non even number of ram.

This will cause ALL your ram to run at half speed / single channel.

Insert them in pairs..

If you really want to do then you can put it in any available slot. Does not matter, and you can mix and match makes- because it is fairly generic ram, with generic timing and speeds.

Using 3 stick might cause your boot screen to beep, or moan that the ram is running half duplex, is uneven or might even show 400mhz instead 800mhz. That is normal. When you get another stick, it will get back to normal, but make sure they are all 800mhz

If you are putting in specific ram with boosted performance. then all 4 need to be the same so you can get the best performance.