Dual-channel memory running single-channel

[c0d1f1ed]

Hi all,

I recently upgraded from 2 x 512 MB Kingston ValueRam to 2 x 1024 MB OCZ Platinum 2-3-2-5, and now it's running single-channel instead of dual-channel.

I have an ASUS A8N-SLI Premium motherboard (nForce 4 chipset) with the latest (non-beta) BIOS, and an Athlon 64 X2 4400+ processors. After booting I see a short message that the memory is running single-channel, 64-bit. Also CPU-Z confirms this. But the whole 2 GB of memory is detected. I searched through the BIOS but couldn't find anything.

Any ideas?

Thanks!

 

[Dahak]

When you installed the memeory, are the installed in the 2black or the 2 blue slots not 1 black 1blue? the colored slots indicate which should be installed for dual channel mode

 

[c0d1f1ed]

The two blue ones, just like the manual sais. The 2 x 512 MB Kingston ValueRam worked fine in dual-channel.

 

[jackschmittusa]

Sounds like the OZC sticks are not being seen as identical.

 

[c0d1f1ed]

They were bought together in one 'dual channel kit'...

Ironically the Kingston modules were bougt separately.

 

[c0d1f1ed]

I tested all possible slot configurations, nothing helped. I also updated my BIOS to the latest beta version, no change.

Did anyone else ever encounter a problem like this? All suggestions are very highly appreciated.

 

[c0d1f1ed]

Anyone? I'm clueless what could be the problem... :Q

 

[theprodigalrebel]

(No real suggestion) If the Kingstons worked fine, I don't think your motherboard is to blame here. You could always write OCZ an e-mail and ask them if they think you got a bad pair. OCZ has excellent support, I hear. Let someone more knowledgable here confirm that its a memory issue, then you can return them and ask for a new pair.

 

[Oyeve]

Is CPU-Z seeing them both as the same type?

 

[c0d1f1ed]

Yes, both modules are recognized as OCZ4001024ELPE with the same timings.

What's slightly odd though is that the BIOS uses timings 2.5-3-3-5 when set on Auto while the SPD information sais 2.5-3-2-5 (and the stickers say 2-3-2-5). I tried to manually set the timings in the BIOS, but this didn't change anything. I'm not sure if I did everything fully correctly though. It should be Tcl-Trcd-Rrp-Tras, in that order, right? Is Tcl (CAS latency) 2.5 or 2 for these modules? Do timings even matter for detecting single/dual-channel mode?

Thank you!

 

[c0d1f1ed]

FYI, here's the rest of the story: OCZ Product Warranty Support forum. Just in case someone bumps into the same problem...