Micron f-die and how well they OC

[KsushaTeaKisa]

Hi @KsushaTeaKisa I recently bought a 2x8GB kit of SPECTRIX D50 3200MHz (white colour 16-20-20) on a sale. I was expecting it to be Micron E die but it actually was Micron F die just like yours (maybe since 2022 they started using F die since my friend bought this in 2021 and has E die - mine's manufacturing date is Week 13 of 2023). I bought this one because my friend told Micron E is good in terms of OC and he was able to run 3600MHz stable at 1.4V with stock XMP (16-20-20-38) timings.

Could you please share your final timings/volts for 3600MHz - I will do my tweaking around them as it will give me a head start.

Thanks

Hi, vegeta1337

Since recently I bought a second kit of this RAM I have not tried to do better overclocking, so I still do not have the final timings for this memory for 3600. However, if you want, you can do my test timings: 18-20-20-42 with 1.35V - 1T - Uncore frequency 1800. It should be stable and better than XMP 3200. The good side is that voltage is used here same as XMP voltage.

My screenshot at the time of testing these timings:

If in the near time you are going to overclock and test various timings for 3600, then please share your experience with me

 

[vegeta1337]

Hi, these were my results

Test specs | Read speed/s | Latency

Default 43.5GB 73ns


1.41V for all results below @ 3600MHz

20 25 25 25 48 64 - 46.8GB ~76ns


18 25 25 25 48 64 - 46.8GB ~75ns


16 25 25 25 48 64 - 46.8GB ~73ns


16–22-22-22-44-64 - 48gb ~72ns


16-21-21-21-44-64 - 48.1gb ~72ns


16-21-21–21-42-62 - 48.2gb ~70ns


16-21-21–21-38-58 - 48.3gb ~70ns


16-21-21–21-42-63 - 48.3gb ~68ns (Using this as per https://github.com/integralfx/MemTestHelper/blob/oc-guide/DDR4 OC Guide.md)

I think by spending more time I can get tighter timings, I also did not go above 3600MHz as my motherboard's site lists 3600MHz as max supported speed.

Here is Micron's pdf around F die https://media-www.micron.com/-/medi...ucts/data-sheet/dram/ddr4/16gb_ddr4_sdram.pdf it has lot of info

 

[KsushaTeaKisa]

Hi, these were my results

Test specs | Read speed/s | Latency

Default 43.5GB 73ns


1.41V for all results below @ 3600MHz

20 25 25 25 48 64 - 46.8GB ~76ns


18 25 25 25 48 64 - 46.8GB ~75ns


16 25 25 25 48 64 - 46.8GB ~73ns


16–22-22-22-44-64 - 48gb ~72ns


16-21-21-21-44-64 - 48.1gb ~72ns


16-21-21–21-42-62 - 48.2gb ~70ns


16-21-21–21-38-58 - 48.3gb ~70ns


16-21-21–21-42-63 - 48.3gb ~68ns (Using this as per https://github.com/integralfx/MemTestHelper/blob/oc-guide/DDR4 OC Guide.md)

I think by spending more time I can get tighter timings, I also did not go above 3600MHz as my motherboard's site lists 3600MHz as max supported speed.

Here is Micron's pdf around F die https://media-www.micron.com/-/medi...ucts/data-sheet/dram/ddr4/16gb_ddr4_sdram.pdf it has lot of info

It seems to me that 1.41V is too much. I have almost the same CPU (Ryzen 5 5500 and Asus TUF GAMING B450M-PRO S). I think you might get a lower voltage result with your PC, but I'm not sure.

 

[vegeta1337]

It seems to me that 1.41V is too much. I have almost the same CPU (Ryzen 5 5500 and Asus TUF GAMING B450M-PRO S). I think you might get a lower voltage result with your PC, but I'm not sure.

I think it can get lower, I set it that way because I was following that guide on github, acc. to that safe voltage range is 1.2V-1.55V for micron. D50 RAM's official site states safe operating voltage as 1.35V-1.5V

By the way did you ever run AIDA64 benchmark for ram? My write speeds per sec are kind of lower compared to read speeds that I posted above, even in XMP settings - checking online I see the culprit being unoptimised timings

 

[KsushaTeaKisa]

I think it can get lower, I set it that way because I was following that guide on github, acc. to that safe voltage range is 1.2V-1.55V for micron. D50 RAM's official site states safe operating voltage as 1.35V-1.5V

By the way did you ever run AIDA64 benchmark for ram? My write speeds per sec are kind of lower compared to read speeds that I posted above, even in XMP settings - checking online I see the culprit being unoptimised timings

Yes, when I tested 18-20-20-42 with 3600 I also did memory test in AIDA64. I have screenshot from that moment.

 

[vegeta1337]

Yes, when I tested 18-20-20-42 with 3600 I also did memory test in AIDA64. I have screenshot from that moment.
View attachment 295721

Thanks for sharing this! I was wondering what is wrong with my write speed - is it ram, is it timings, and after playing for an hour with bios settings I found out I had to set BGS to ALT mode.

Now my write speed crossed 50k MB/s (overall +15% performance & latency improvement)

 

[KsushaTeaKisa]

Thanks for sharing this! I was wondering what is wrong with my write speed - is it ram, is it timings, and after playing for an hour with bios settings I found out I had to set BGS to ALT mode.

Now my write speed crossed 50k MB/s (overall +15% performance & latency improvement)


View attachment 295760

Glad to hear that
When I'll start to try new overclock for 32Gb (4 modules) then I'll prefer lower voltage because 1.4v and more sounds too hot for me. But so far, I like performance that I got by buying a second 16GB kit

 

[vegeta1337]

Glad to hear that
When I'll start to try new overclock for 32Gb (4 modules) then I'll prefer lower voltage because 1.4v and more sounds too hot for me. But so far, I like performance that I got by buying a second 16GB kit

Yes with 4 sticks you would probably be conservative of voltage, also if you do overclocking do try tightening the timings also (this ram seems to use super loose timings if you OC using Auto settings - could be my mobo though) here is a comparison pic from a youtube video that shows impact of latency

By tightening timings I was able to improve latency by ~18% over auto one - guide for timings adjustment

 

[KsushaTeaKisa]

I overclocked my 4 modules to 3600!
There were about 7 attempts, but in the end I came up with this result:
18-21-21-21-42, 3600Hz CR1, Voltage 1.35V (first time I tried with 1.37V), power down "auto" -> "disabled", gear down mode "auto" ->"enabled"

TM5 test (1usmus_v3, 3 cycles) - 0 Errors
OCCT CPU test - 0 Errors
OCCT Power test - 0 Errors

Given that XMP gave me a latency about 80-85ns, I think that I got a good result (I'm noob to overclocking), I am very glad that I was able to save "1.35v".


However, I have one question. Is it normal that values have increased?

I don't know what it is, but it's all on "Auto" I guess. With XMP these values were 0.9~ and 0.75~ and now it is 1.14~ and 0.85~