Question about K8N Neo4 and TWINX1024-3200XLPRO ram

[feverish]

Hello,
My question is this.
From what I gather the TWINX1024-3200XLPRO is Double side ram as opposed to single side. I do not know what that means but I think I am correct on this. In my K8N Neo4 motherboard manual, it states that the "Recommended Memory Combination" being Green(1st slot), Purple(2nd), Green(3rd), Purple(4th). I will just list the combos they say. Going from 1st slot through 4th and S=Single, D=Double
S,-,-,- DDR400
-,-,S,- DDR400
D,-,-,- DDR400
-,-,D,- DDR400
S,-,D,- DDR400
D,-,D,- DDR333
S,S,-,- DDR400
-,-,S,S DDR400
D,D,-,- DDR400
-,-,D,D DDR400
S,S,S,S DDR400
D,D,D,D DDR333
I already put most of my machine together and have the TWINX1024-3200XLPRO ram in when I saw this. The only problem is that I am running D,D,D,D DDR400. While sitting in the bios last night I noticed that the modules on DIMM 3 and DIMM 4 were being worked pretty hard according to the leds on top and DIMM 1 and DIMM 2 were not having any activity. Someone please explain to me what all this means and where I need to go from here. I will also add that I have booted up into the bios and all 2 gigs of ram are showing up. I really just want to know what will happen if I use it this way. Do they even make 512 single sided ddr dual channel ram?
Thanks,
David

 

[feverish]

Anyone?

 

[darkeyed]

It is my understanding that using 4 double sidded chips in any nforce 4 board will cause some timming problems that can be solved by reducing the memory speed to DDR333. Which is just slowing the clock rate down for the memory. Now depending on your memory you can still get DDR400 timmings or better. Just depends on the memory. But they have to show that in the manual because the performance with four double sidded chips is less then that for 2 double sidded.

I think that is correct from all I have learned

 

[feverish]

thanks for the reply.
That makes sense somewhat. I basically have taken 2 of them out and left the other 2 in for dual channel. I am really trying to understand the whole timing thing now. The Corsair TWINX1024-3200XLPRO ram is supposed to come with timings of 2-2-2-5, but I don't think that it has been set to this. How do I go about making sure that this is the timing I am getting. Also how do I make sure that the ram is acting in Dual Channel?

 

[FastEddie]

You should be able to manually set your timings to DDR400, but you will be undable to set a 1T command Rate. Your memory will run at 2T instead, with four modules.