Samsung oem DDR4 OC

[dominik1411]

I have a ryzen 7 2700 on an aorus x570 elite and two Samsung OEM 16GB DDR4 B-Die Sticks (M378A2K43BB1-CRC).

Currently I have them running on CL16-17-17-39 3133MHz(more info in screen) with 1.43V DRAM and 1.25V SOC Voltage.

I wanted to serr if anybody has a suggestion where maybe I could improve the OC a little bit.

Thanks in advance

[Jurrunio]

22 minutes ago, dominik1411 said:

SOC Voltage.

X299 doesnt have SOC voltage, all it has are VCCSA and VCCIO. You probably dont need to go past 1.2V since 3133MHz CL16 really isn't hard on the memory controller

 

22 minutes ago, dominik1411 said:

I wanted to serr if anybody has a suggestion where maybe I could improve the OC a little bit.

Make numbers besides tCL, tRCD, tRP, tRAS and tCR back to auto and start lowering tCL, tRCD, tRP and tRAS one step at a time.

[Mathieu9836]

1.2 VSOC is the maximum safe limit, it's risky to kill the CPU on long term usage over that.

Download Thyphoon Burner, Download Ryzen DRAM Calculator.

Usually work well, but you might have to tinker a little bit if it's not stable with FAST settings.

I would personally try something like

14-14-14-34-48 at 3000mhz if you can make it.

maybe you will have to use 2T as command rate

[dominik1411]

Okay I  now have VSOC at 1.172V and my RAM is at 3000MHz 14-16-16-36-55 but with only 1.28V (which I think is good).

[Mathieu9836]

1 minute ago, dominik1411 said:

Okay I  now have VSOC at 1.172V and my RAM is at 3000MHz 14-16-16-36-55 but with only 1.28V (which I think is good).

It's good, but bad for B-dies, but at the same time running these timings at 1.28 DRAM voltage is good, increase it to 1.35 and try lowering them one by one until it crashes, then you can increase voltage to 1.4-1.45 if you want to lower them even more!

[dominik1411]

I made an interesting discovery before that 14-16-16-36-55 at 1.28V is fully stable but 14-14-14-36-55 at 1.43V is not stable at all. These sticks seem to have a limit on one of those two timings has a lower limit around 15 or 16 where I cant get below that.

[Mathieu9836]

What i usuaaly do is increase voltage when it's no longer stable, i put 1.35v at first, then when i can no longer the timings i see if it will scale with 1.4, then 1.45 if i'm still unable to run the timing i want, until 1.5 just for curiosity. If it's stable at 14-16-16-36-55 with 1.28, try 14-15-16-16-36, with 1.35, then 14-15-15-36-55, then lower tRAS and tRC. You can also try tRRDS and tRRDL at 7 and 7, i don't remember which timing need to be equal or higher then the 2 others, might want to watch Builzoid's videos.

 

At the end if you can't lower those timings at all, you can try 2T command rate, but it increase latency a bit, it's not always worth it with B dies.

[dominik1411]

lol 14-15-15-16-35-52 is stable with 3000mhz at 1.29V

[Mathieu9836]

Usually B-die can run something like 14-14-14-14-32-something, with 1.35-1.4 at 1T

[dominik1411]

As I said 14-14-14-36-55 3000mhz is not even stable with 1.43V. And these are still oem b-die unbinned sticks, so I think I can't really get more out of them with me being limited by the cpu (3133Mhz only possible at 1.2VSOC or higher)

[Mathieu9836]

There is still a lot of things you can do like increasing termination resistance, it helps with signal integrity, also switching from 1T to 2T improve stability