*Official* Intel DDR4 24/7 Memory Stability Thread - Page 830 - Overclock.net - An Overclocking Community

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*Official* Intel DDR4 24/7 Memory Stability Thread

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post #8291 of 8544 (permalink) Old 02-19-2019, 08:00 AM
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Quote: Originally Posted by Jpmboy View Post
annotated in-line
Thank you!

One setting that I can't any guidance on is "tWR" Is there a general rule for that?

A weird thing on my Z390 Auros Pro. I can't get the tWTR_S/L to train. Just always defaults to 8/17.
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post #8292 of 8544 (permalink) Old 02-19-2019, 08:34 AM
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if tWR stands for write recovery time, I generally make sure it is same as CAS or up to +7, making sure it is an even number. So if example, CAS was 12, max would be 18, not 19.
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post #8293 of 8544 (permalink) Old 02-20-2019, 07:15 AM
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I have a 9900k on an XI Formula board.

32GB G.Skill 4266 kit with stock timings of 17-18-18-38. TRFC is auto set to 748 and TREFI to 16150.

Could not get stable at 4266mhz but testing these settings at 4133 and seems stable:
16-18-18-34
tRFC 560
tREFI 32300

Does this sound reasonable? Anything I should test further/focus on? Do you think my tRFC could realistically go much lower? Would prefer to avoid corrupting the OS.

Currently testing this:
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post #8294 of 8544 (permalink) Old 02-20-2019, 09:02 AM
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Quote: Originally Posted by CerN View Post
I have a 9900k on an XI Formula board.

32GB G.Skill 4266 kit with stock timings of 17-18-18-38. TRFC is auto set to 748 and TREFI to 16150.

Could not get stable at 4266mhz but testing these settings at 4133 and seems stable:
16-18-18-34
tRFC 560
tREFI 32300

Does this sound reasonable? Anything I should test further/focus on? Do you think my tRFC could realistically go much lower? Would prefer to avoid corrupting the OS.

Currently testing this:
What do you mean "seem stable"?

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post #8295 of 8544 (permalink) Old 02-20-2019, 09:18 AM
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Quote: Originally Posted by Jpmboy View Post
What do you mean "seem stable"?
Been stress testing for a few hours, and saved this as a profile. Gonna do overnight testing, but I just want to know if you see anything wrong, or anything I should change, and if not - what to focus on next?
I have OCed frequency and primary timings for years, but never dived into secondary and tertiary stuff before.
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post #8296 of 8544 (permalink) Old 02-20-2019, 10:24 AM
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Quote: Originally Posted by CerN View Post
Been stress testing for a few hours, and saved this as a profile. Gonna do overnight testing, but I just want to know if you see anything wrong, or anything I should change, and if not - what to focus on next?
I have OCed frequency and primary timings for years, but never dived into secondary and tertiary stuff before.

Hate to be that guy, but can you let us know what method of testing you're using?

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post #8297 of 8544 (permalink) Old 02-20-2019, 11:18 AM
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Quote: Originally Posted by chibi View Post
Hate to be that guy, but can you let us know what method of testing you're using?
HCI Memtest.

I'm happy to go into details, but I just really want some assurance that my timings seem OK, or if the stuff set by XMP/Training is bad/wrong etc.
If anything stands out as weird, or some obvious easy gains.

Last edited by CerN; 02-20-2019 at 11:21 AM.
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post #8298 of 8544 (permalink) Old 02-20-2019, 11:56 AM
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Quote: Originally Posted by CerN View Post
HCI Memtest.

I'm happy to go into details, but I just really want some assurance that my timings seem OK, or if the stuff set by XMP/Training is bad/wrong etc.
If anything stands out as weird, or some obvious easy gains.
Well, once you have proven stability, the best way to see if anything is seriously off with your timings is to run the AIDA64 memory benchmark, compare to others here and post it here.

That will tell you whether you're memory is operating in the expected performance range for the timing/frequency you're running which is not always a given even though it's stable at 4133. I had a 4133 (2x8) that was really, really hard to get it to even close to as fast as 4000 and it took a couple tertiary timing adjustments to even get it close. Before that, it was quite slow.

So, check your memory benchmark numbers.

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post #8299 of 8544 (permalink) Old 02-20-2019, 01:08 PM
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I'm trying to find daily io/sa values. I recently got my ram kit to 4400 19-20-20 bios vdimm 1.46v (hwinfo vdimm 1.48v) and still trying to stabilize (karhu, hci, my usage) them. Some times I'll settle for just one short-term testing and then it must not cause issues during my daily usage (nothing mission-critical, if anything, far from it).

In z370 taichi's bios, io/sa = 1.23v/1.27v, but hwinfo reads io/sa = 1.248v/1.288v. Since buildzoid's recent ram oc on z390 aorus master, I am sort of not afraid to try up to 1.3v for vccsa.
In the organized tables of the first post, there's maybe only a handful of samples that used >1.3v for vccsa (also the highlights helped to spot them, thanks OP). Noted 1.35v vccsa sample was under the description of uncommon/excessive voltage.

(image: Karhu's ram test, using slightly less thread and ram bc I'm actively using the system while testing too. Visual speck is really just the "gsync compatible indicator" at tiny res.)
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post #8300 of 8544 (permalink) Old 02-20-2019, 04:19 PM
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yes, 1.30V is safe.

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