Help needed with RAM Timings

[futurethinkers]

Hi Guys it's been a while ! I have been using my overclocked F3-12800CL8D-8GB 1600 Mhz RAM (overclocked to 2133MHz with no problems)

I would like some guidance with the secondary/third and Misc timings and how to improve these settings that my Asus Motherboard P8Z77-V has automatically set.

Here are all of my timings. Please note i don't need help with my primary timings these are 100% stable.

Primary Timings
DRAM Cas# Latency CHA: 11,CHB: 11
DRAM RAS# to CAS# Delay CHA: 11,CHB: 11
DRAM RAS# PRE Time CHA: 11,CHB: 11
DRAM RAS# ACT Time CHA: 11,CHB: 11
DRAM COMMAND Mode CHA: 1, CHB: 1

Secondary Timings
DRAM RAS# to RAS# Delay CHA: 7, CHB: 7
DRAM REF Cycle Time CHA: 171, CHB: 171
DRAM Refresh Interval CHA: 8320, CHB:8320
DRAM WRITE Recovery Time CHA: 16 CHB: 16
DRAM READ to PRE Time CHA:9 CHB: 9
DRAM FOUR ACT WIN Time CHA:33 CHB:33
DRAM WRITE to READ Delay CHA:9 CHB:9
DRAM CKE Minimum Pulse Width CHA:6 CHB:6
DRAM CAS# Write Latency CHA:8 CHB:8
DRAM RTL(CHA) CHA D0: 32,CHA D1:42
DRAM RTL (CHB) CHB D0: 32, CHB D1: 43
DRAM IO-L(CHA) CHA D0: 0, CHA D1: 3
DRAM IO-L(CHB) CHB D0: 0, CHB D1: 3

Third Timings
tWRDR (DD) CHA: 1,CHB: 1
tRWDR (DD) CHA: 4, CHB: 4
tRWSR CHA: 4, CHB:4
tRR(DD) CHA: 3, CHB: 3
tRR (DR) CHA:1 CHB:1
tRRSR CHA:4, CHB:4
tWW (DD) CHA:3, CHB:3
tWW (DR) CHA: 3, CHB:3
tWWSR CHA: 4, CHB:4

MISC

DRAM CLK Period Auto
Transmitter Slew(CHA) Auto
Transmitter Slew(CHB) Auto
Receiver Slew(CHA) Auto
Reciever Slew(CHB) Auto
MCH Duty Sense (CHA) Auto
MCH Duty Sense (CHB) Auto

Thanks for your help in advance

[emissary42]

Primary Timings
DRAM RAS# ACT Time CHA: 11,CHB: 11

Are you sure that is correct? For your other primary timings a value around 20-28 would be more typical.

Secondary Timings
DRAM RAS# to RAS# Delay CHA: 7, CHB: 7
DRAM REF Cycle Time CHA: 171, CHB: 171
DRAM Refresh Interval CHA: 8320, CHB:8320
DRAM WRITE Recovery Time CHA: 16 CHB: 16
DRAM READ to PRE Time CHA:9 CHB: 9
DRAM FOUR ACT WIN Time CHA:33 CHB:33
DRAM WRITE to READ Delay CHA:9 CHB:9
DRAM CKE Minimum Pulse Width CHA:6 CHB:6
DRAM CAS# Write Latency CHA:8 CHB:8
DRAM RTL(CHA) CHA D0: 32,CHA D1:42
DRAM RTL (CHB) CHB D0: 32, CHB D1: 43
DRAM IO-L(CHA) CHA D0: 0, CHA D1: 3
DRAM IO-L(CHB) CHB D0: 0, CHB D1: 3

For secondaries try

DRAM RAS# to RAS# Delay --> 6, 5, 4
DRAM REF Cycle Time --> reduce in steps of 4 or 5 towards 120
DRAM READ to PRE Time & DRAM WRITE to READ Delay --> 8, 7
DRAM CAS# Write Latency --> 7 (, 6)

Leave the thirds alone, your mainboard should train those by itself. You could however fiddle with latency boundary if it is available in your UEFI (i don't know if ASUS Non-R.O.G. mainboards have that).

[futurethinkers]

Hey mate thanks for the quick and very informative answer

Yes that was a typo DRAM RAS# ACT Time 11 it's actually 28

I'll try tweaking with your suggestions. I read that DRAM Refresh Interval (mine) CHA: 8320, CHB:8320

You can up this value and get better performance. Would you think that's ok ?

Many thanks

[emissary42]

DRAM Refresh Interval can have impact on performance, but most ASUS mainboards are doing fine when it is set to AUTO. If you want to tinker with it, look for performance differences between 6420 / 7936 / 8320 / 10300 and then draw your own conclusions based on that

[futurethinkers]

DRAM Refresh Interval can have impact on performance, but most ASUS mainboards are doing fine when it is set to AUTO. If you want to tinker with it, look for performance differences between 6420 / 7936 / 8320 / 10300 and then draw your own conclusions based on that

Thanks Emissary you're a real champion

Hey one last question. Dram Clock period... i have it set on 5 atm. I can't find any definitions on this one - can you share your wisdom on this ?

Cheers mate

[emissary42]

DRAM Clock Period = 5 is already pretty tight, i would leave it at that.

Quote from ASUS R.O.G. forums

DRAM CLK Period: Can really affect performance and yet overclocking at the same time. A centered value of around 5 or 7 usually gives best performance but it may not be that great for overclocking. A value of 3 or 7 can be good for Command Rate 1T overclocking.

[futurethinkers]

DRAM Clock Period = 5 is already pretty tight, i would leave it at that.

Quote from ASUS R.O.G. forums

I just did a fresh install of windows as i re-flashed the mobo bios as version 2104 is crappy. Reverted back to earlier version.

I found out that by changing the DRAM Clk Rate the mobo has tuned all of the secondary timings we talked about so i didn't have to manually adjust them again

Thanks for all of your guidance with this.

[emissary42]

You're welcome