CMZ16GX3M2A1600C10 & CML16GX3M2A1600C10 Installed

[rayman664]

Hi, I am not very computer technical but I did manage to build my first computer and I have questions about the memory I now have. I have the ASRock Z77 Extreme6 Mobo with the i7-3770 CPU. I originally installed Corsair CMZ16GX3M2A1600C10 (2x8GB) memory. Later, I also installed the Corsair CML16GX3M2A1600C10 (2x8GB) low profile memory. I selected the low profile specifically so the last slot would not interfere with the CPU cooler clearance. I had thought that these two part numbers were identical RAM with the only difference being the tall vs short heat spreaders. The label affixed to all 4 sticks indicate that they are all 1600 10-10-10-27 memory. All seems to be running stable however...

 

I have found that on all testing programs I have used that the CMZ16GX3M2A1600C10 is identified as 1600 800MHz 10-10-10-27 memory and the CML16GX3M2A1600C10 is identified as 1333 667MHz 9-9-9-24 memory. Why is this so?

[peanutz94]

I had thought that these two part numbers were identical RAM with the only difference being the tall vs short heat spreaders. The label affixed to all 4 sticks indicate that they are all 1600 10-10-10-27 memory. All seems to be running stable however...

To a point. Yes it is basically the same, However it is still considered a random kit because all your memory did not come from one single package. And quite often two idendical kit's do not play nice together let alone a totally differnt part number. The chips used to make the modules may also be different too.

 

I have found that on all testing programs I have used that the CMZ16GX3M2A1600C10 is identified as 1600 800MHz 10-10-10-27 memory and the CML16GX3M2A1600C10 is identified as 1333 667MHz 9-9-9-24 memory. Why is this so?

Can you post a pic or something to show us what your looking at? If your tryin to run them all together it may be that you have two mis-matched kits and when put together will default to the slowest speed if they do not play nice together.

 

Corsair does not suggest or support mixing/combining memory even if they are the same exact part number. But with all four insatlled please load set-up defaults and enable the XMP profile. Then post a screen shot of CPU'z "memory" and "SPD" tabs.

[rayman664]

I'm not really sure how to attach the screenshots from CPU-Z here, but I hope that is what is below:

 

 

 

 

Slots 3 & 4 are pretty much a mirror of their dual-channel match, so I did not post them.

 

Thanks for your help.

[peanutz94]

CPUz pic one shows your memory running at 1600mhz. 800mhz x 2=1600mhz. DDR stands for double data rate so ou would double the 800mhz.

 

The rest of your pics are just the SPD information and will not change no matter what ignore it. Right now your memory is running where it should , so if your machine is stable then you should be good to go.

[rayman664]

I understand that the memory is all running at 1600 800MHz 10-10-10-27.

But doesn't that mean the CML16GX3M2A1600C10 having to be over-clocked, or whatever, to achieve that setting while the CMZ16GX3M2A1600C10 is not?

 

If that is the case, is the CML16GX3M2A1600C10 not being truthfully advertised? I guess that's the point I'm trying to make, because I was expecting both RAM sets to have the exact same natural specs.

 

Thanks again for your knowledge and help.

[peanutz94]

But doesn't that mean the CML16GX3M2A1600C10 having to be over-clocked, or whatever, to achieve that setting while the CMZ16GX3M2A1600C10 is not?

They are both rated at 1600mhz cl10 with the same exact 10-10-10-27 timings at 1600mhz kits . It has or makes no difference. ALL four sticks are running the exact same. And since your CPU has native 1600mhz memory support there is no overclock. Your looking at the line that reads "Max Bandwidth"...This is where mixing kits is no a good idea...You have one kit that is true 1600mhz modules and one that is 1333mhz that when overclocked will run at 1600mhz. But again, it doesn't matter in your case.

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