[GUIDE] Skylake Memory Timings on Asus Motherboards !

[Alex@ro]

Twtr_l and _S are not linked between,so adjusting them will actually adjust twrrd_sd and dg , minimal values are 6-1 and 21-16. Trrd_l and S are also not linked ,for samsung this works 6-4 good ,for hynix over 3466 you should try 7-5 or even higher if you can't find stability.

[Botvinnik]

Thank you for your good guide. I have some question. I see read to precharge = 6 and write recovery time = 10 in b-die section. Didn't write recovery time suppose to be 12 (13 in asrock timing config).

 

Another question is should I care about tWR-Pre and tRD-Pre.

[Alex@ro]

Oh yes, however by adjusting twr-precharge to 23 from 26 u will lower the write rexovery from 12(13 shown) to 10. Read precharge can be lowered by a few units too from default, didn't see any important gains though.

 

Sent from my SM-N910F using Tapatalk

[speed.fastest]

Just curious, try 4 DIMM B-Die just for fun, it pretty efficient for the memory clock and timing though

 

[max0x7ba]

I have ASUS Maximus IX Hero with i7-7700k and 4x8GB G.Skill Trident Z DDR4-4000 18-19-19-39-1.35V. I was getting sporadically code 55 on boot and random crashes for a year and could not find a way to fix that.

I followed this guide, issues 1 and 4, and set manually tRDWR_sg, tRDWR_dg, tRDWR_dr, tRDWR_dd to 18 and tWRWR_dd to 8.

That fixed my problems and now my system is rock stable. 3DMark and Intel Extreme Tuning Utility benchmarks report 6% CPU and memory performance improvement.

Many thanks for sharing this information.

5GHz_setting.txt

[Alex@ro]

Glad that it helped

[Botvinnik]

What is max safe voltage for AFR on air ? I am good at 3500 12-17-17-28 1.848V. Wanna try 11-16 maybe 1.95V ?

It is OEM RAM without heatsink but I have fan over it.

[Alex@ro]

For benching you can try, nobody knows what safe is considered but after few hours at 1.9+ i have seen no degradation. For Samsung B-die at least values of 2.05-2.1V over a few dozen hours did no harm but as you know ymmv.....

[ssk2]

for information and/or explaination ,

i experienced some stranges results on my z170 (asus pro gaming) + B-Die 3600C15 GTZ (the one with close chip)

 

-> TRDWR sg/dg/dr/dd = 15 // superPi = 7m01

-> TRDWR sg/dg/dr/dd = 13 // superPi = 7m09

-> TRDWR sg/dg/dr/dd = 14 // superPi = 7m00

 

Strange ? Normal ?

[Splave]

try 12 12 12 12  or 12 12 12 11

 

ram timings can be funny, but its also what makes them fun to play with. lower not always better

 

[ssk2]

Seems its wont boot at 12 :[ but well i constated another thing :

my superpi results are never the same , at each boot or during same session they can be differents, they are between 7m00 and 7m09 , do i miss something ??

the os is win10 but very light

 

 

Edited October 9, 2019 by ssk2

[Leeghoofd]

go for 7 or even better XP to have correct comparison btn timings and SuperPI score

[ssk2]

Hi,

 

Glad i found a FREE (yes oO) Maximus IX Extreme, ok iam not a 2019 guy.

Sadly this board is doing worse than my z170 pro gaming....

i cant find stability at same timming (cf my screen before) ... 3733Mhz 14-14-14-28 2T, almost everything fixed, also RTL/iOL @ 57-56-7-6, i managed to reach the same perf than with the pro gaming but that was a very hard war. That board sometime that booted at 3866 stable ingame on win10 for hours...!, i was so happy, but next reboot gave me code 55 or 49, couldnt understand. Same story at 3733 even with tRDWR fixed at 14 or 15...but today its ok ROCKSTABLE ! did i miss something oO ? a boot voltage...? Grrr ! but i enjoy:b

[KingGustavo]

On 11/23/2019 at 1:10 PM, ssk2 said:

Hi,

 

Glad i found a FREE (yes oO) Maximus IX Extreme, ok iam not a 2019 guy.

Sadly this board is doing worse than my z170 pro gaming....

i cant find stability at same timming (cf my screen before) ... 3733Mhz 14-14-14-28 2T, almost everything fixed, also RTL/iOL @ 57-56-7-6, i managed to reach the same perf than with the pro gaming but that was a very hard war. That board sometime that booted at 3866 stable ingame on win10 for hours...!, i was so happy, but next reboot gave me code 55 or 49, couldnt understand. Same story at 3733 even with tRDWR fixed at 14 or 15...but today its ok ROCKSTABLE ! did i miss something oO ? a boot voltage...? Grrr ! but i enjoy:b

I have same problems with Maximus IX Extreme i upgraded from Maximus VIII Hero with M8H i was able to boot  with memory set to 4000Mhz with Maximus IX Extreme unable boot 3866Mhz.

Edited January 1, 2020 by KingGustavo
BCLK overcloking works well...