Same Part Number RAM Showing Different Speed ?

Bint Box

Bint Box

Bint Box

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Hi,

I have 4 x 4gb GSkill Ripjaws RAM chips all with the same part number of F3-12800CL9D-8GBxL. However, when checking the RAM with CPU-Z or the PC BIOS the maximum bandwidth is showing different values for different pair of RAM chips?

One pair show a max bandwidth of 800MHz in the SPD tab of CPU-Z and the other pair show a max bandwidth of 667MHz? If I swap over the positions of the pairs in the motherboard I can see that it is the actual RAM chips with different speeds and not the motherboard slots. Is this normal or are the RAM chips actually different speeds but with the same part number?

The only other difference is that one pair of chips are labelled with XMP and the other pair are not labelled as XMP. It is the XPM pair that have the max bandwidth of 800MHz and the non XMP pair with the max bandwidth of 667MHz.

Would anyone please be able to provide some info on what is going on?


Thx
Bintos
 
Open CPU-Z and look at the SPD tab.

Select the different sticks of RAM in the drop down menu and see if they have the same part number listed there.
 
Surveyor said:
Open CPU-Z and look at the SPD tab.

Select the different sticks of RAM in the drop down menu and see if they have the same part number listed there.
Click to expand...

Yes, they do have the same part number there in the SPD tab of CPU-Z, I checked that as well as the label on the RAM chips themselves.
 
If both sets are 1600MHz, but one set doesn't have an XMP profile for whatever reason, then you're probably going to have to set the speed, timings and voltage manually in the BIOS to get 1600MHz.

If you can set the XMP profile in the BIOS then it may pick up the settings from one set and apply those to all the RAM.
 
Surveyor said:
If both sets are 1600MHz, but one set doesn't have an XMP profile for whatever reason, then you're probably going to have to set the speed, timings and voltage manually in the BIOS to get 1600MHz.

If you can set the XMP profile in the BIOS then it may pick up the settings from one set and apply those to all the RAM.
Click to expand...


Thx for the reply and the info, it sounds a bit scary to a noobos "clocker". I am reasonably sure that the BIOS will have some settings that i can adjust as it supposed to be a half decent board. I will see if I can sort it out.


Tx
Bintos
 
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