Samsung B-die RAM finder(for choosing RAM for Ryzen systems)

[Helios451]

According to thaiphoon burner, the uploaded data (this is all there is in the database) for the SKU's are as follows:-

CMK16GX4M2B3200C16

Hynix TFC
1067 MHz 16 15 15 36 50 4 6 6 23
1067 MHz 15 15 15 36 50 4 6 6 23
933 MHz 14 13 14 31 44 4 5 5 20
933 MHz 13 13 14 31 44 4 5 5 20
800 MHz 12 11 12 27 38 3 5 5 17
800 MHz 11 11 12 27 38 3 5 5 17
667 MHz 10 9 10 22 31 3 4 4 14
667 MHz 9 9 10 22 31 3 4 4 14

and

SAMSUNG E-DIE
1067 MHz 16 15 15 36 50 4 6 6 25
1067 MHz 15 15 15 36 50 4 6 6 25
933 MHz 14 13 13 31 44 4 5 5 22
933 MHz 13 13 13 31 44 4 5 5 22
800 MHz 12 11 11 27 38 3 5 5 19
800 MHz 11 11 11 27 38 3 5 5 19
667 MHz 10 9 9 22 31 3 4 4 16
667 MHz 9 9 9 22 31 3 4 4 16

CMK16GX4M2Z3200C16

SAMSUNG B-DIE
1333 MHz 16 18 18 35 53 5 8 8 28
1200 MHz 15 17 17 32 48 5 8 7 26
1067 MHz 14 15 15 28 43 4 7 6 23
1067 MHz 13 15 15 28 43 4 7 6 23
933 MHz 12 13 13 25 38 4 6 5 20
800 MHz 11 11 11 21 32 3 5 5 17
800 MHz 10 11 11 21 32 3 5 5 17
667 MHz 9 9 9 18 27 3 4 4 14

I've found out that both are Samsung B-Die, although with different voltages and timings:


and


Question, therefore, can they be used together?

[kalniel]

I've found out that both are Samsung B-Die, although with different voltages and timings:


and


Question, therefore, can they be used together?

Yes. If you wanted to stay in JEDEC for whatever reason then set both to 2133 16-15-15 as per common timings. Or set them both to what corsair tested them at.

[Domestic_Ginger]

Why not?

Start with one set to build and then whack in all four sticks and see. What are you hoping to OC to?

[Helios451]

Why not?

Start with one set to build and then whack in all four sticks and see. What are you hoping to OC to?

I'd be happy to have them at 3200MHz, as advertised, but would prefer to get them up to the 3600Mhz region if the Mobo BIOS allows it.

[ik9000]

I'd be happy to have them at 3200MHz, as advertised, but would prefer to get them up to the 3600Mhz region if the Mobo BIOS allows it.

get them stable at 3200 and see what voltage you can get that to work at then if you still have headroom left go up from there but being mindful of the max recommended ram voltage in the mobo and cpu manual. The alternative to pushing for high speeds is to stay at 3200 and tighten timings for shorter latency. 3200 at CL14 is not much different from 3600 at CL16 latency-wise when you do the nano-second conversions.

[Helios451]

I've actually now got all four sticks running at 3733MHz, just by yanking up the frequency multiplier. The only bugbear is that the timings are now a bit pants, per CPU-Z:

CL - 26
tRCD - 27
tRP - 28
tRAS - 58
RD - 89
CR -1T


I suppose I should try and tweak those and see where it gets me. Otherwise, I'll go back to 3200MHz.

[Helios451]

Back at 3200MHz with 1.35V, not XMP but manually picked and the timings have improved to:

CL - 22
tRCD - 22
tRP - 23
tRAS - 53
tRC - 76
CR -1T

Cinebench20 gave me 7,222 average over three runs.

That compares with 7,249 average for running with XMP - around a 0.3% difference.

Makes me wonder if this RAM tweaking is worthwhile!

[Helios451]

Well, perhaps I was a little too hasty -

I now have all four sticks at 16-18-18-36, running 3200MHz.

Average of three, running XMP and PBO enabled (as it was before) on Cinebench20 was 7392 - a 2.35% uplift over the last manual settings.

[ik9000]

you know how to do a hand check for latency right?

https://notkyon.moe/ram-latency.htm

[maxmememax]

Wish I knew about this when I bought my ram