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4x8 GB TridentZ 4000 17 17 17 37 timings ?

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post #1 of 12 (permalink) Old 02-19-2019, 04:09 AM - Thread Starter
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4x8 GB TridentZ 4000 17 17 17 37 timings ?

Hello,

I have a 4x8 GB TridentZ 4000 c18 19 19 39 kit.

I tried to change the 4 main timings to 17-17-17-37 and a few other ones but my system is not 100 % stable with these values, because every timing must be changed.

Consequently, if you own the 2x8 GB or 4x8 GB TridentZ 4000 17 17 17 37 kits, may you give me your XMP values for the following timings, please (on Gigabyte Z390 Aorus Pro) :

t CCD_S
t CCD_L
t REFIx9
t XP
t XPDLL
t PRPDEN
t RDPDEN
t WRPDEN
t CPDED
t AONPD
RFR delay
t XSDLL
t XS offset
t ZQOper
t MOD
round trip latency (Dimm0/rank0)
round trip latency (Dimm0/rank1)
round trip latency (Dimm1/rank0)
round trip latency (Dimm1/rank1)
IoLatR0D0
IoLatR1D0
IoLatR0D1
IoLatR1D1
Rtt Nom (dimm0)
Rtt Nom (dimm1)
Rtt Park (dimm0)
Rtt Park (dimm1)
Rtt Wr (dimm0)
Rtt Wr (dimm1)

Thank you.

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post #2 of 12 (permalink) Old 02-19-2019, 02:47 PM
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See the Memory Stability Thread

The best thing you can do is to go to the end of this thread

*Official* Intel DDR4 24/7 Memory Stability Thread

and look back through the last 6-12 months of posts and you will find screenshots of memory timings that are relevant to what you're doing.

One point of that thread is to be a collection spot for exactly that.

Note that a 4x8 set is an entirely different beast to overclock vs. a 2x8 set. They will not have much in common so I'd only look at exactly what you have. The timings on the 4x8 set will likely have to be looser and by how much will depend a bunch on the particular motherboard.

[email protected] (-1 AVX offset) on ASRock Z390 Taichi with Noctua NH-D15 air cooler
CPU offset voltage of -25mv, runs VRVout 1.240-1.313V on full AVX load, 1.225-1.275V on non-AVX load
2x8GB [email protected] at 1.45V, G.Skill F4-3733C17Q-32GTZKK (XMP rated [email protected])
EVGA GTX 1060 6GB OC with Corsair RMx 750W power supply
Samsung 970 EVO 500GB NVMe boot SSD and four other drives all in a Fractal Design R6 Case

Last edited by jfriend00; 02-19-2019 at 02:53 PM.
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post #3 of 12 (permalink) Old 02-19-2019, 11:39 PM - Thread Starter
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Quote: Originally Posted by jfriend00 View Post
The best thing you can do is to go to the end of this thread

*Official* Intel DDR4 24/7 Memory Stability Thread

and look back through the last 6-12 months of posts and you will find screenshots of memory timings that are relevant to what you're doing.

One point of that thread is to be a collection spot for exactly that.

Note that a 4x8 set is an entirely different beast to overclock vs. a 2x8 set. They will not have much in common so I'd only look at exactly what you have. The timings on the 4x8 set will likely have to be looser and by how much will depend a bunch on the particular motherboard.
OK, thank you. I will look at your link.


Last edited by GTANY; 02-20-2019 at 06:26 AM.
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post #4 of 12 (permalink) Old 02-20-2019, 01:37 PM
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I think you may find that unless extra v helps you will have to back off from your goal of 4000c17 on that MB with 4 sticks.
Sub timings are probably already extremely slack and need tightening once you get it stable.
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post #5 of 12 (permalink) Old 02-20-2019, 01:54 PM
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Here you go. Running on a Trident Z RGB 32 GB 8x4 4000 17-17-17-37 kit. Complete subtimings at the link. Note that I am able to run everything on Auto and its Memtest stable to 1200% confirmed with a 5.0 OC on my 9900K on a Z390 Aorus Master https://imgur.com/a/DvcmQsK
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post #6 of 12 (permalink) Old 02-20-2019, 11:40 PM - Thread Starter
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Quote: Originally Posted by HBizzle View Post
Here you go. Running on a Trident Z RGB 32 GB 8x4 4000 17-17-17-37 kit. Complete subtimings at the link. Note that I am able to run everything on Auto and its Memtest stable to 1200% confirmed with a 5.0 OC on my 9900K on a Z390 Aorus Master https://imgur.com/a/DvcmQsK
Thank you : I will test your timings and report later.

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post #7 of 12 (permalink) Old 02-21-2019, 11:24 AM - Thread Starter
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Quote: Originally Posted by HBizzle View Post
Here you go. Running on a Trident Z RGB 32 GB 8x4 4000 17-17-17-37 kit. Complete subtimings at the link. Note that I am able to run everything on Auto and its Memtest stable to 1200% confirmed with a 5.0 OC on my 9900K on a Z390 Aorus Master https://imgur.com/a/DvcmQsK
I confirm that my system is now stable with your timings, confirmed by Assassin's Creed Origins during several hours, game which detects RAM instabilities very quickly.

Thank you again : rep +1.

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post #8 of 12 (permalink) Old 02-21-2019, 01:13 PM
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Have you tried lowering tRFC from 700? 300-400 would be preferable.
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post #9 of 12 (permalink) Old 02-21-2019, 08:31 PM
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Quote: Originally Posted by Dasa View Post
Have you tried lowering tRFC from 700? 300-400 would be preferable.
Have not. System seems to like it at that level, so letting it run.
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post #10 of 12 (permalink) Old 02-21-2019, 11:42 PM - Thread Starter
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Quote: Originally Posted by Dasa View Post
Have you tried lowering tRFC from 700? 300-400 would be preferable.
What are the most impactful timings for performance, in addiditon to the 4 main ones and the command rate ? And what gain in percentage can I obtain if I optimize these other timings ?

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