Dual Channel problem

Well, I just upgraded from an old Athlon XP to a Core2 system, and everything is running nicely, but for some reason, I can't get my RAM to operate in Dual Channel.

I have 2x 1GB Kingston 667 sticks, and I have them set up in the following configuration:

A1 (Slot A) | Occupied
B1 (Slot B) | Vacant
A2 (Slot C) | Occupied
B2 (Slot D) | Vacant

I have double checked the mobo manual, and I know that this configuration is correct for dual channel mode, but it still runs at a measly 667 MHz

Just for sake of experimentation, I have also tried using slots A1 and B1 instead, but this only gave me identical results :mad

My FSB is also 1333.

Hardware:
Intel E6550 Core2 Duo 2.33 GHz
2x 1GB Kingston 667MHz DDR2
Asus P5N32E-SLI Plus Mobo

 

Do you have hyperthreading technology enabled?

(page 4-23 of the manual)

 

And are the two Kingston sticks absolutely identical in every way? If not, the memory will not run in dual channel mode?

 

Did dual channel technology change? Does it now double the speed of the ram? In my system, it gives a new performance increase, but my ram is still running at 433mhz, DDR. I would think your ram would run as DC (still following what Mims said), but with the ram speed being 667mhz, DDR.

Can someone confirm?

 

Fair point there is a difference between double speed (not available) and dual channel.

What does the bios report on the general tab?

 

I am no way any expert on ram, so please be kind to me, :foolish
but I understood that the dual channel increased the bandwith in multiples, but, the fsb only by 15 to 30% extra -
I have not gone into overclocking, but that was where I believed the fsb was increased.:confused
I have kept the Kingston whitepaper link, and just thought it might clear things up to others.
http://www.kingston.com/newtech/MKF_520DDRwhitepaper.pdf

:duck

 

Confirming. The RAM will still run at the spec'd frequency, 667 MHz. Performance increase in dual channel usually is around 10-15%. Dual channel uses the memory modles parallell, instad of one of them at the time, hence the boost.

 

I realise that the RAM still runs at 667, but the throughput would be 1333 MHz. No, I don't have HT btw. The kingston sticks were purchased in a set of 2, they are identical. I understand how dual channel works and how to set it up. It's ok though, I found the problem, EVEREST wasn't reporting correctly, I tried using cpu-z and it detected that the ram was in fact running 1:1 along side my FSB (1333). One thing that I did notice was that during POST, the memory configuration was not stated, and from what I know, it normally is. In the BIOS, it didn't say anything about what mode it was operating in, just that the memory was running at 667. Thanks for the help either way

 

I have noticed odd discrepancies between reports on memeory from Everest, Sandra, Checkit, PC check and the BIOS.