• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Why does my 1333mhz memory run at 1066mhz?

Nebor

Nebor

Lifer
I just noticed this while I was flipping around in the BIOS looking for anything related to my slow SSD. This is an msi p67a-c45 with an i7 2600k processor.

My memory (this one) defaults to 1066mhz in the BIOS, with CAS settings of 7-7-7-20. But it's supposed to be 1333mhz, with CAS settings of 9-9-9-24. The BIOS reports that the SPD is for 1066mhz. When I tried setting the memory speed to 1333mhz, the system became unstable.

cpuzmemory.jpg


Thoughts or ideas? Does it even make a difference? The last time I looked at anything related to memory speeds, it was at least loosely related to the processor speed, but that doesn't seem to be the case with this system.
 
Show your CPU-Z SPD tab.

Also,
The BIOS reports that the SPD is for 1066mhz. When I tried setting the memory speed to 1333mhz, the system became unstable.
Click to expand...

Did you set the timings manually also to 9-9-9-24?
 
When you manually set 1333 in the BIOS, did you set the timings manually also to 9-9-9-24 OR, did you leave them at 7-7-7-?


My suggestion is to clear your CMOS and enable the XMP profile in the BIOS.
 
Nebor said:
I just noticed this while I was flipping around in the BIOS looking for anything related to my slow SSD. This is an msi p67a-c45 with an i7 2600k processor.

My memory (this one) defaults to 1066mhz in the BIOS, with CAS settings of 7-7-7-20. But it's supposed to be 1333mhz, with CAS settings of 9-9-9-24. The BIOS reports that the SPD is for 1066mhz. When I tried setting the memory speed to 1333mhz, the system became unstable.

cpuzmemory.jpg


Thoughts or ideas? Does it even make a difference? The last time I looked at anything related to memory speeds, it was at least loosely related to the processor speed, but that doesn't seem to be the case with this system.
Click to expand...

I have almost the exact same problem with my system. When I set the memory to run at 1600mhz, it is not stable but is fine at 1066mhz.
 
Yellowbeard said:
When you manually set 1333 in the BIOS, did you set the timings manually also to 9-9-9-24 OR, did you leave them at 7-7-7-?


My suggestion is to clear your CMOS and enable the XMP profile in the BIOS.
Click to expand...

I tried the XMP option. It was not stable. From what I read on the corsair forum, this memory is not rated for XMP.
 
Manually set the voltages to either 1.5v or 1.6v and see if that helps. If it is set to "Auto" sometimes it isn't stable. Be sure not to be more than .5v higher than the QPI voltage.
 
Ah I did a little bit of reading on the Corsair forums. It looks like this memory, CMX8GX3M2A1333C9, isn't rated to run 1333mhz @ 1.5v and Sandy Britches isn't rated to run memory beyond 1.5v. So this memory isn't compatible. Corsair is recommending we buy their Vengeance memory instead.

I just ordered CMZ8GX3M2A1600C9 from newegg. Looks like it costs the same as what I already had. So these old ones will be going on FS\FT when I get the new ones. I wish Corsair wouldn't have listed this memory as compatible on their website, and people on the GH forum hadn't recommended it to me.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top