Confusing JEDEC timings in CPU-Z

[Microbell]

Howdy all,

I checked the other posts but I'm a little confused at my ram timings in CPU-Z. I have 2 sticks of 8GB ram for a total of 16GB (G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 2133 (PC4 17000) Intel Z170 Platform / Intel X99 Platform Desktop Memory Model F4-2133C15D-16GVR) running on a MSI Gaming Z170A GAMING M3 LGA 1151 Intel Z170 HDMI SATA 6Gb/s USB 3.1 ATX Intel Motherboard bios ver A40.

The ram is installed in slot 2 and slot 4 and running dual channel but it seams the ram is slightly underclocked on the JEDEC's with different timings. This was a kit from G.Skill and I'm wondering if this is a CPU-Z reporting anomaly or I have an issue with that ram?

Link to pic if it won't display----> http://imgbox.com/k2IQ7ds1

 

[Hlsgsz]

Well what speed is it running at?(it's under memory)
What you have posted are the characteristics of teh ram sitck, not the actual speed it's running at.

 

[pm4]

What timings were advertised with your RAM?

Those settings in CPU-Z are ok.
That JEDEC 6 for example is 2133 (1066 x 2 +-) with timings 15-15-15-36.
JEDEC profiles are standard profiles for RAM, all DDR4 (and also previous versions DDR3,...) have them.
In short those are settings all RAMs of that category should be able to use.
As you see there are multiple profiles for your RAM and you can pick between those in BIOS.

Other than these JEDEC settings you could have also XMP settings, these are manufacturer specific and it essentialy mean factory overclocked RAM. In this case manufacturer promise that RAM should work with these overclocked settings. Your RAM got only JEDEC profiles so no factory overclocked and should work on any of those JEDEC profiles. So pick best and try if your motherboard accepts it.

 

[Microbell]

The ram is 2133 and one stick JDEC 6 and 7 is correct @1066mhz. My question was about the other stick who's timings are different JDEC 4 and 5 running @923 and 925 which equates to 1846mhz and not 2133mhz. Trying to figure out why it's being underclocked.

As for XMP mine's disabled and my understanding is that since my board supports 2133 and higher you can't use XMP automatically unless I have ram that's faster then 2133mhz. I can push it through manual overclock though by setting the timings manually.

Example: If I had 2800mhz or 3000mhz I can then use XMP in auto mode in the bios. Correct?

Timings Advertised for ram: 15-15-15-35

I can try and set these manually and do away with "Auto" in the bios but the bios should have selected the same settings for both sticks as they are identical from the same kit.

*Note* Both sticks tested with memtest86 (ver 7.0 I think) both alone and together produced no errors.

 

[Hlsgsz]

Ok, now youve confused me. Plese post pictures of the memory tab and both populated slots selected under SPD.

 

[Microbell]

@Hlsgsz

Ok.

Here is what CPU-Z is displaying.

Memory Tab

http://www.imagebam.com/image/866b70495032116

Slot 2

http://www.imagebam.com/image/b18878495032117

Slot 4

http://www.imagebam.com/image/96f4c8495032120

Again my curiosity is about the JEDEC #4 and JEDEC#5 Frequency and timing settings being picked up with the ram set to "Auto" in the bios as they don't match JEDEC #6 and #7

PS: If someone could tell me how to embed these pictures in the post that would be helpful as the img code, bbcode don't seem to work grrrrrrrrr

 

[Hlsgsz]

Your RAM is working as it should. Both DIMMS are using JEDEC #7.
There is no such thing as two or more DIMMS working at different frequencies at teh same time. If they differ, they will all work at the lowest settings of them all.
What you are seeing under "SPD" are teh characteristics of teh DIMMs, meaning what they are CAPABLE OF, not how they are actually working. The real working speed is in the MEmory tab.