CMK16GX4M2B3200C16 timing ?

[FastFreddie]

Hello, I have 2x8GB of the subject ram installed in the recommended slots of my GB B450 Aorus Pro mobo and it works great with the 3200 XMP profile. However, when overclocked to 3600 I had to loosen the timings from 16-18-18-18-36 to 18-20-20-20-40. It has passed preliminary testing with memtest and windows memory diagnostic. I'm looking for suggested timings for this particular kit at 3600 (1800Mhz). I have the latest UEFI (F62d) and a Ryzen 3600X. TIA

 

[FastFreddie]

Update: More testing hasn't found any errors so I suppose I'll just stick with 18-20-20-20-40. Dram calculator is ridiculously optimistic suggesting CL16 for this budget high latency 3200 kit. It won't even POST at CL16 above 3400. Thaiphoon Burner states that the ICs are Samsung, die unknown. Do any Corsair techs ever post here?

[LeDoyen]

sometimes but it's mainly a user's forum.

the DDR4 3200 CL16 is the thrash can of DDR4 😛 just about any chip can do these timings so you are never sure what to get,  and even then there's no binning on that speed, luck of the draw.

CL18 sounds about right.. that gives you the same latency as in 3200 CL16. (16 clock cycles at 3200mhz = 18 clock cycles at 3600)

Maybe you should do some benchmarks and see if you gained anything because it's possible nothing moved at all depending on what you use your PC for.

[Corsair Notepad]

Unfortunately we are not going to be able to advise on any sort of custom overclocking or timing tuning of memory kits.

[FastFreddie]

4 hours ago, LeDoyen said:

sometimes but it's mainly a user's forum.

the DDR4 3200 CL16 is the thrash can of DDR4 😛 just about any chip can do these timings so you are never sure what to get,  and even then there's no binning on that speed, luck of the draw.

CL18 sounds about right.. that gives you the same latency as in 3200 CL16. (16 clock cycles at 3200mhz = 18 clock cycles at 3600)

Maybe you should do some benchmarks and see if you gained anything because it's possible nothing moved at all depending on what you use your PC for.

Thanks! I haven't done a lot of benching so far but Cinebench, Passmark and 3DMark all show slight gains at 3600. I may test some more at 3400 since it seemed stable using stock XMP settings. Do you think my current 3600 timings look okay for this trash can ram? Although stable when tested with windows memory diagnostic test and memtest86 I was wondering if 18-22-22-22-42 might not be safer. I know the testing routine for tweaking timings but I don't care enough to go through all that. I just want safe timings with little hassle. Thanks again.

1 hour ago, Corsair Notepad said:

Unfortunately we are not going to be able to advise on any sort of custom overclocking or timing tuning of memory kits.

Fair enough I suppose. How about an explanation of how my ram kit is "optimized for Ryzen" but "not optimized for Ryzen 2000 & 3000". I purchased this ram kit based on the first claim and only learned of the second fact much later. I'm not entirely sure what this means for my Ryzen 5 3600X PC.

[LeDoyen]

it means the XMP (intel) or DOCP (AMD) profile has been tuned for the advertized platform.

It works at the rated 3200 CL16 basically

[Corsair Notepad]

12 hours ago, FastFreddie said:

Fair enough I suppose. How about an explanation of how my ram kit is "optimized for Ryzen" but "not optimized for Ryzen 2000 & 3000". I purchased this ram kit based on the first claim and only learned of the second fact much later. I'm not entirely sure what this means for my Ryzen 5 3600X PC.

No where has it been stated that the kit is not compatible with AMD Zen 2 CPUs. On the contrary as per your own evidence they work as they are intended with Zen 2 CPUs. We also clearly mark compatibility on our technical specifications for the link, linked below, and it clearly shows it supported for use on AMD 300/400/500 series chipsets.

 

https://www.corsair.com/us/en/Categories/Products/Memory/VENGEANCE-LPX/p/CMK16GX4M2B3200C16#tab-tech-specs

 

[FastFreddie]

17 hours ago, LeDoyen said:

it means the XMP (intel) or DOCP (AMD) profile has been tuned for the advertized platform.

It works at the rated 3200 CL16 basically

That's why when I saw that it was "optimized for Ryzen" I bought it. I probably should have dug a little deeper but at least it works as advertised, if not ideally.

10 hours ago, Corsair Notepad said:

No where has it been stated that the kit is not compatible with AMD Zen 2 CPUs. On the contrary as per your own evidence they work as they are intended with Zen 2 CPUs. We also clearly mark compatibility on our technical specifications for the link, linked below, and it clearly shows it supported for use on AMD 300/400/500 series chipsets.

 

https://www.corsair.com/us/en/Categories/Products/Memory/VENGEANCE-LPX/p/CMK16GX4M2B3200C16#tab-tech-specs

 

I probably should have posted the link previously, but I didn't have it saved so I had to search for it again (see below). I didn't say that anyone stated that this ram was not compatible with Ryzen 2000 & 3000, just not optimized for it. I'm just curious what it means that my ram kit is not optimized for Ryzen 2000 & 3000. Does it mean that it's optimized for Zen but not Zen + and Zen 2? TIA

 

AMD RYZEN 2000 & 3000 SERIES Memory Compatibility List – Corsair

 

My kit is listed in the above linked table and notated as "Not optimized for Ryzen 2000 & 3000". Hence my question.

Edited December 17, 2021 by FastFreddie

[LeDoyen]

i doubt any manufacturer would guarantee a kit to run at 3200 with zen or zen+ 🙂 it was very hit and miss with the first gen

[Corsair Notepad]

That KB Article is two years old and does not have the most up to date information. Our technical specifications for our kits has the most current information as to what platforms the kit is compatible with which I already provided. The fact that it works without an issue at the XMP speed and you have been able to overclock and get some stability shows there are no issues with your choice of CPU with that kit of memory.

[FastFreddie]

7 hours ago, LeDoyen said:

i doubt any manufacturer would guarantee a kit to run at 3200 with zen or zen+ 🙂 it was very hit and miss with the first gen

Good point.

1 hour ago, Corsair Notepad said:

That KB Article is two years old and does not have the most up to date information. Our technical specifications for our kits has the most current information as to what platforms the kit is compatible with which I already provided. The fact that it works without an issue at the XMP speed and you have been able to overclock and get some stability shows there are no issues with your choice of CPU with that kit of memory.

I didn't know that the KB article currently on Corsair's website was outdated, thanks. Just to clarify, I am not complaining about my ram kit. I feel that I got what I paid for and it even exceeds my expectations by running at 3600 speed with further relaxed timings. I was mostly curious if the XMP timings were optimal for Ryzen 2000 & 3000. You say they are and I'm good with that. Thanks.