[SOLVED] B-Die CL16 vs D-Die CL15 - Ryzen 3000

Dec 9, 2019
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Hi all,

My first thread in the forum. I have searched some but not been able to find anything directly related to my question.

Just upgraded to a Ryzen 3800x on a Asrock Taichi x570 motherboard. A final thing to decide on is the memory.

I bought the following memory: D-Die G.skill 3600 Mhz CL15 (F4-3600C15D-16GTZ) running with XMP settings giving the following latency: 16-15-15-35. (CL is automatically being increased to 16 due to Ryzen not accepting uneven values for CL (according to G.skill support themselves).)

I have run a few tests and am getting bad latency results and generally mediocre to bad results for the memory tests. Now I am trying to figure out why.

Results from MaxxMem and PerformanceTest V9.0:
PerformanceTest Results
MaxxMem Results

I have ordered a pair of B-Die G.skill 3600mhz CL16 (F4-3600C16D-16GTZR ) as well, which are supposed to be B-die. However I am thinking that the CL15 rated memory theoretically should perform better even if they are not "supposed" to be run with an AMD. I want to make sure I have given the CL15 D-dies the correct settings for making a proper comparison.

Is there any reason for the B-dies to be expected to perform better than the D-dies at the original rated speed and latency?
 
Dec 9, 2019
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I got he B-Die kit and have done some bench mark tests to try to figure out which to choose of this kits.

I made a presentation that includes some of the tests I've done. And honestly the difference is not that big, and unfortunately results are not very consistent either.

See results here: https://drive.google.com/open?id=1s0MncDK9fUPi6HAIPvglCE1iUmcNG0cB

The D-Dies are approx 50 USD (or 500 Swedish Kr) more expensive. Any reason not to choose the B-Die over the D-Die despite the CL15 rating?
 
Dec 9, 2019
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Look for 'gear down mode' or equivalent in bios settings. This will enable you to use the CL15 setting, and you can test to see if it performs better.
Hi Keith,

Thanks for you reply. I actually did try this based on G.skill's on suggestion. I activated "gear down" but it did nothing to the CL. Still stuck at 16.
 
Hey there,

Have you updated the bios? This is essential. Once done, do a CMOS clear, then try again in bios.

It's possible that even if you have done the bios update, without the CMOS clear, it could still not work. Let us know how that goes.
 
Dec 9, 2019
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Hi again. Great inputs.

I did update the BIOS... But did not clear CMOS! Will definitely do this right away.

Regarding the DRAM Calc, this was what started my whole investigation. I get an error message when trying to calculate things when choosing D-Die. It simply says "not supported". So that could be seen as a downside of the D-die's already.
 

DMAN999

Reputable
Herald
I have Hynix DJC (D Die) G.Skill Ripjaws V 16GB (F4-3600C16D-16GVKC) @ 3733 MHz 16-19-19-19-36-56 in my 3700x rig and this is the best I could get so far:
View: https://imgur.com/a/jLdkoRa
View: https://imgur.com/bcrCfPl


I OC'd it to 3733 and had to tigthten up a few timings including tRFC, tRFC2 and tRFC4 to get there.

PS
The C16 Samsung B die kits are Not as well binned as the C14 B die kits and do NOT OC or perfrom as well.
I have G.Skill TridentZ RGB16GB 3200 MHz (F4-3200C16D-16GTZR) @16-17-17-17-36-56 (Samsung B die) in my 2600 rig and they do Not OC or perform anywhere near as well as the C14 B Die kits do.

View: https://imgur.com/cwvzV6z
 
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Reactions: keith12
Dec 9, 2019
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Thanks DMAN for your inputs. It seems Bios had been reset for some reason. Changed the clocks manually to 3600 and enabled XMP again. One thing I noticed in the first run above was that timings actually showed as 15-15-15-35 - but at the base clock of 2133 mhz. Is there any particular reason it could set the timings correctly for the lower clock?

I got better results this time:
 
Last edited:

TJ Hooker

Glorious
Herald
Dec 9, 2019
11
0
20
1
I got he B-Die kit and have done some bench mark tests to try to figure out which to choose of this kits.

I made a presentation that includes some of the tests I've done. And honestly the difference is not that big, and unfortunately results are not very consistent either.

See results here: https://drive.google.com/open?id=1s0MncDK9fUPi6HAIPvglCE1iUmcNG0cB

The D-Dies are approx 50 USD (or 500 Swedish Kr) more expensive. Any reason not to choose the B-Die over the D-Die despite the CL15 rating?
 
Dec 24, 2019
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Hi all,

My first thread in the forum. I have searched some but not been able to find anything directly related to my question.

Just upgraded to a Ryzen 3800x on a Asrock Taichi x570 motherboard. A final thing to decide on is the memory.

I bought the following memory: D-Die G.skill 3600 Mhz CL15 (F4-3600C15D-16GTZ) running with XMP settings giving the following latency: 16-15-15-35. (CL is automatically being increased to 16 due to Ryzen not accepting uneven values for CL (according to G.skill support themselves).)

I have run a few tests and am getting bad latency results and generally mediocre to bad results for the memory tests. Now I am trying to figure out why.

Results from MaxxMem and PerformanceTest V9.0:
PerformanceTest Results
MaxxMem Results

I have ordered a pair of B-Die G.skill 3600mhz CL16 (F4-3600C16D-16GTZR ) as well, which are supposed to be B-die. However I am thinking that the CL15 rated memory theoretically should perform better even if they are not "supposed" to be run with an AMD. I want to make sure I have given the CL15 D-dies the correct settings for making a proper comparison.

Is there any reason for the B-dies to be expected to perform better than the D-dies at the original rated speed and latency?
They are NOT D-die.

G.skill 3600 Mhz CL15 (F4-3600C15D-16GTZ) are 100% B-Die


Latest versions of Typhoon Burner gets WRONG readouts on this memory kit. Older versions get correct memory reading on this kit.

WRONG read! - K4A8G085WD-BCPB - These do not exist neither on the internet or samsung DDR4 production page.

CORRECT read! K4A8G085WB-BCPB - Exists on the internet aswell as the samsung DDR4 production page.
 

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