Dual Channel Memory?

[Damo Campbell]

In my previous PC it booted up clearly showing memory running in Dual Channel. Now I have SLI ready EPP memory how can I tell if it is running in Dual Channel or is this function now removed with the SLI memory modules?
I appreciate the advice offered on this forum, thanks.
A lot more responsive than the XFX help desk ticket system.

[the_dope_chaud]

you memory should run in dual channel for sure, you have a recent motherboard, and dual channel is pretty standard now.
The place to look is you motherboard box or site, look at the options/features, and I'm sure you'll see it!

[Bio-Hazard]

To see if the memory is in fact running in dual chanel mode, just watch the boot screen, it should say something about it during boot up. You can also use a simple program like CPUz to check that is running in dual chanel, simply run the program, go to the memory tab and it will say dual or single chanel.

http://www.cpuid.com/cpuz.php

[Damo Campbell]

Cheers, I got the CPU-Z program and the memory is identified as Dual Channel however rather alarmingly the memory options now show some concerns: Frequency 533.3mhz is this per module making a pair 1066mhz as advertised by Corsair?
Also the SPD options show the following: Max Bandwith PC2-6400 (400MHz) and not PC2-8500 (800MHz) again presented by Corsair. This is very confusing any assistance is greatly welcomed. Thanks Damien.

[darkorb]

is ur ram 1066?

cpu-z shows the true speed of ur ram, which is infact Half of 1066 = 533. DDR means Double Data Rate, so just double that true speed and u will get 1066. i no its not well explained but i hope it helps you out

[Bio-Hazard]

Could you post up a screen shot of CPUz like the one I posted, it would help out a lot.

The reason that CPUz is showing PC6400 settings in the SPD section is because that's the JEDEC standard for the ram. The PC8500 rating is the EPP standard from Corsair, that's where your EPP setting in your MoBo Bios comes into play. If you have EPP turned off in the bios, you'll have to manually OC the ram to get to these settings.

Here's Corsairs PDF on your memory, iut should explain this a bit better than I can, and besides, I hate to type.................;)

http://www.corsair.com/_datasheets/TWIN2X2048-8500C5DF.pdf

[Damo Campbell]

I am unable to screen print the way you have but will the attached file give you the same info?

[the_dope_chaud]

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[timberwolf120]

is ur ram 1066?

cpu-z shows the true speed of ur ram, which is infact Half of 1066 = 533. DDR means Double Data Rate, so just double that true speed and u will get 1066. i no its not well explained but i hope it helps you out

darkorb is correct, you should be fine. CPU-z is correct, but you can look into your BIOS to double check if you really wanted to.

[2161]

This looks like a good place to ask this question.

I have the XFX 680i SLI motherboard with 2Gig of OCZ highspeed DDR2 800 speed ram (It's not SLI-ready RAM). I am considering doubeling it since the ram is so cheap, does this motherboard run 4Gig of RAM ok?? The reason I would like to double is that a couple of games I play use more then 1 Gig or RAM while playing them.

GTR2 can use 1.3Gig of RAM depending on the track and the amount of cars running.

Microsoft Flight Simultaor X can use 1.5Gig of RAM with while using high graphics with a lot of buildings.

Doom 3 and Quake 4 both use over 1Gig of RAM with MAX graphics on.

CPU - Core 2 Duo - O/C 3.6Ghz
Motherboard XFX 680i SLI - FSB O/C 1800Mhz
RAM - OCZ PC6400 - O/C 900Mhz 4-4-4-9 2T
Graphics cards - Dual EVGA 8800 GTS 320MB

Thanks

[werty316]

Yes your board supports 4GBs.