DDR2 Asymmetric?

Wzd · 5 Jan 2008 at 17:30

Hi all!

I've just setup a new system and i'm getting asymmetric dc mode in cup-z (which i thought wasn't full dual channel) is this correct for the following setup:

Asus P5KC Combo Intel P35
http://www.overclockers.co.uk/showproduct.php?prodid=MB-243-AS&groupid=701&catid=5&subcat=913

&

Corsair 4GB DDR2 XMS2 PC2-6400C5 TwinX
http://www.overclockers.co.uk/showproduct.php?prodid=MY-136-CS&groupid=701&catid=8&subcat=813

I'm kind of new to all this so everything on the motherboard is set to auto as im not sure what the manual setting should be!

Cheers

Munkeh · 5 Jan 2008 at 17:42

Did you put the ram into the right slots on the motherboard? i.e. 1&4 or 2&5?

Wzd · 5 Jan 2008 at 18:27

Yep i have them in 1 & 4 ...or A1 & B1 as it refers them to in the manual

gurusan · 5 Jan 2008 at 18:28

It is full dual channel....it just means it's not running 1:1 with the FSB (which is nothing to worry about)...

Wzd · 5 Jan 2008 at 18:29

Aaa ok, so it will be ok then? There's no performance loss?

I'm running it with a Q6600 btw

Wzd · 5 Jan 2008 at 18:32

Hang on, have i answered my own question there...the Q6600 runs at 1066 and the memory at 800...so is that why it says asymmetric?

Wzd · 6 Jan 2008 at 01:54

OK so i overclocked the CPU to 3.2 and the FSB is now running at 400mhz to so i get 1:1 ratio...but it still says Asymmetric in the DC Mode box :S

WJA96 · 6 Jan 2008 at 08:29

If you definitely have the RAM in the right slots then it's either a bug in CPUz or your memory modules are not matched properly.

You might also want to try forcing 2T if you have that option.

If I remember correctly the P5K-C has both DDR2 and DDR3 RAM slots. The odd behaviour you're seeing might be something to do with a compromise the ASUS engineers had to make to bodge the two types of RAM together on one board (and yes, I do know you can't use them together).

muon · 6 Jan 2008 at 13:12

Check what the BIOS is saying.

I thought the asymmetric mode meant that it is running in dual channel, but the modules are of different sizes.

Cob · 6 Jan 2008 at 14:14

CPU-Z says Dual Symmetric when I'm running in Flex mode (three 1gb sticks) on my DS3P.

Try CPU-Z v1.43.

Wzd · 7 Jan 2008 at 01:20

Its very strange, i updated the motherboard bios and the memory sticks are definately the same (cause they came together in the same box, lol)

Here's what i get in cpu-z 1.43...

Wzd · 7 Jan 2008 at 01:30

Here's the individual memory details too...

Both look the same me me :S

HeX · 7 Jan 2008 at 08:37

Don't worry I get the same with 4 x 1GB Geil 6400 ULL, all the sticks are identical but it still says Asymetric when it blatantly isn't.