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CMD16GX3M2A1866C9 causing crash on Asus P8Z77-pro


Raven0215

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Hello,

 

I purchased the above referenced memory last December. Whenever I set it to XMP Profile in the asus bios is causes my computer to crash. I have the latest bios update. I noticed the xmp profile is giving numbers of 9-9-9-27 where as your website says 9-10-9-27. It has been this way since I got the memory but if I made the changes manually it wasn't a big deal. I was hoping for some ideas to fix this or wonder if it needs to be replaced as it is defective memory

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Hi Raven , i don't believe this is defective. This ca often be solved with just a couple of BIOS tweaks.

First and foremost,Do you have the latest BIOS for your MB? If not please go ahead and flash to latest stable version.

 

From there make sure to load set up defaults and enable XMP. Usually it's BIOS update that cures the mis-decting issue(as far as the timing go) But check to see if they are set to 9-10-9-27 with XMP enabled.. If they are not, go ahead and manually change it. It's possible the SPD chip wasn't programed correctly , but that wont affect performance or the way the memory functions. It just a simple timing adjustment.

 

One last step and you should be all set. With the XMP profile enabled, manually set your DIMM voltage to 1.55 and even possibly 1.6 if you have to. This is common with speeds above the native 1600mhz your CPU is rated for. That and sometimes MB's will tend to undervolt the memory despite what the BIOS says. BIOS's are not the most accurate when it comes to reading voltages.

 

But start out at the 1.55v and only go to 1.6 if you need to. It's not going to hurt anything if you do, it's just better to use the lowest possible voltage when your overclocking.

 

Let me know how you make out.

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Hi Raven , i don't believe this is defective. This ca often be solved with just a couple of BIOS tweaks.

First and foremost,Do you have the latest BIOS for your MB? If not please go ahead and flash to latest stable version.

 

From there make sure to load set up defaults and enable XMP. Usually it's BIOS update that cures the mis-decting issue(as far as the timing go) But check to see if they are set to 9-10-9-27 with XMP enabled.. If they are not, go ahead and manually change it. It's possible the SPD chip wasn't programed correctly , but that wont affect performance or the way the memory functions. It just a simple timing adjustment.

 

One last step and you should be all set. With the XMP profile enabled, manually set your DIMM voltage to 1.55 and even possibly 1.6 if you have to. This is common with speeds above the native 1600mhz your CPU is rated for. That and sometimes MB's will tend to undervolt the memory despite what the BIOS says. BIOS's are not the most accurate when it comes to reading voltages.

 

But start out at the 1.55v and only go to 1.6 if you need to. It's not going to hurt anything if you do, it's just better to use the lowest possible voltage when your overclocking.

 

Let me know how you make out.

 

Yeah I have the latest Bios, If I change the settings manually to 9-10-9-27 everything works fine without changing the voltage etc.

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Well, in your case i wouldn't let it bother you much. I'm with you , but i don't believe the memory is to blame. this is more of a BIOS issue than it would be the memory.

 

You can check this by running CPUz and look at the SPD tab. If it shows the correct timings under the XMP column, then it's your board that's not reading the chip correctly. This is something can possibly be corrected in a future BIOS It the SPD chip is programed wrong then it will show the 9-9-9-27 timings instead of 9-10-9.

 

Ya know after writing this it made me think of one other thing...Is there more than one XMP profile available to choose from in your BIOS? Have you tried the second one if there is?

If there is a second profile and neither work then I would still believe the above to be true.

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