Xmp problem

[Vix2995]

Hi, i had my kit of vengeance lpx die and now im in procces of RMAing.

In the meantime i placed 2x16 kit in my system and it isnt reaching 3200 mhz as its supposed to. The last kit which was 2x8 was doing just fine at 3200mhz for 5 years. I contacted the vendor and they said its because my mobo and cpu doesnt support this speed at this size, which sounds BS to me. Should i return or it is really the case? Also can you inform me what does the ver on the memory sticks mean? For example my last were 4.24 and the new ones are 3.43.

I tried putting it at lower frequency and it runs at 3066, but i dont know how stable it is.

 

 

I7 6700K

MSI Z170A M7

[c-attack]

When Z170 first launched, there really weren't any 16 GB modules on the market. They existed, but not for normal consumer use. According to your MB spec page, it supports 4 modules and a max of 64GB, so clearly that are saying it can take 4x16GB. Support for that would have come in a BIOS update somewhere down the line.

 

That said, I've never heard of anyone running 4x16 on a Z170. That doesn't mean it's not possible, but Z170 was the first mainstream DD4 platform and there was a definite wall to get over around 3000 MHz and that for 2x8 kits. Doubling the density is not going to make things easier. You probably need to give a lot of attention to your VCCIO and VCCSA voltage. Z170 was really finicky about those in general and motherboard default values were often way off base. This is one of the few settings were more voltage is not necessarily more stable. In general, a 16GB module is going to be more difficult than a 8GB module.

 

Version numbers for RAM are not often sequential and may refer to the supplier of the semi-conductor material (3.xx is Hynix, 4.xx is Samsung, etc).

[Vix2995]

Thanks for the answer. I didnt have problem at 3200 for so much time, but i guess i have ran out of luck. I am sure if i mess with the voltages i can get it to 3200 but I dont want to play with fire. I will just leave it as it is 3066 mhz and call it a day. Also may I ask can you explain to me if there is a significant difference between Hynix Samsung and Micron. In Typhoon it says my RAM is Micron B-die, but you said 3.xx is Hynix?

[Vix2995]

What is the difference between cmk32gx4m2b3200c16 and cmk32gx4m2d3200c16?

One of them is 5 euro more than the other and the timings are different. 16-18-18-36, compared to 16-19-19-36

[c-attack]

The different timings suggest they may come from different suppliers or came into existence some time apart. The "b" product pages suggests it is for Intel 300 series or newer and the "d" for Intel Z170, Z270, and up suggesting it is older. Does that mean the B kit won't work? Not necessarily.

 

The above about Hynix=3 was just an example. I think the version numbers to origin may be hidden somewhere in the forum, but I can't guarantee that every 4.xx kit is Samsung, or 5=Hynix, or 3=Micron. There are other people more knowledgeable who track this with more interest. My point was that 3.xx is not replaced by 4.xx, etc. As to any benefit for one particular die or manufacturer, it tends to vary. Most often you can tell by the timings. A 16-18-36 @3200 is going to be a better binned kit than 17-19-39 @3200 if that is for the same voltage. 18 vs 19 on tRCD is likely not significant for anyone except those attempting to extend their performance right to limit.

[Vix2995]

Hmm interesting, my old one was B and it is written on them "for GEN 6 I7" even tho the site suggests its newer. It was bought back when i originally built my system so then gen6 was the newest. So i should not worry and just call it a day? Anyways, thanks for the help really appreciate it.