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post #11531 of 11995 (permalink) Old 02-18-2020, 08:56 AM
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Quote: Originally Posted by wholeeo View Post
Recently I've seen people with timings ike 16-15-15, 15-14-14. What's going on here? Didn't know that tRCD and tRP could be set lower than tCL.
Timings and "Rules":

Primary Timings:

CL: Start with a safe frequency/CL combination and adjust from there.
tRCD/tRP: Try 0-2 above CL (Samsung B-die) or 1-5 above CL (other ICs).
tRAS: CL + tRCD + tRTP (Source) or CL + tRCD + 2 (Source and Diagram). Min: 28. (Source: ASRock UEFI description)
CR: Try 1, otherwise leave at 2.


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post #11532 of 11995 (permalink) Old 02-18-2020, 09:08 AM
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Quote: Originally Posted by wholeeo View Post
Recently I've seen people with timings ike 16-15-15, 15-14-14. What's going on here? Didn't know that tRCD and tRP could be set lower than tCL.
B-die and a good memory controller.
I can run from 3200mhz 14-13-13 to 4000mhz 17-16-16 (1.35v).
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post #11533 of 11995 (permalink) Old 02-18-2020, 09:23 AM
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Not many controllers and chips are capable of it. I can technically run 4000 16-15-15-28-280 but it isn't very stable and needs a LOT of voltage. I prefer 4200 16-17-17-28-280-2T which is a lot easier and doesn't really have any worse latency so..

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post #11534 of 11995 (permalink) Old 02-18-2020, 12:41 PM
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Quote: Originally Posted by Gen. View Post
Так как tWRRD_sg и tWRRD_dg на 2 завышены по сравнению с JEDEC, решил проверить. Опустил значения на 2 - с 27 и 24 до 25 и 22, соответственно. Ошибок нет. Неужели прокатит и рискну ради интереса просто попробовать ниже...
I think your translator is broken

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post #11535 of 11995 (permalink) Old 02-18-2020, 03:52 PM
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Quote: Originally Posted by wholeeo View Post
Recently I've seen people with timings ike 16-15-15, 15-14-14. What's going on here? Didn't know that tRCD and tRP could be set lower than tCL.
I started setting tRCD/tRP below cas when I noticed in aida 64/hwfino/cpu-z that there were different jedec profiles that looked offbeat with those timings wit.

In my perception its like this for example:

14-14-14>14-15-15>15-14-14 >15-15-15

If you can do straight 15 but can't do straight 14, try in between like 14-15-15 or 15-14-14.

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post #11536 of 11995 (permalink) Old 02-18-2020, 06:36 PM
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I am looking to upgrade my ram. I currently have 2x16Gb Corsair Dominator 3000 C15 which uses Hynix AFR chips.

What is the best option with my Asrock Z390 Phantom ITX?

I am looking at G.Skill F4-3200C14D-32GTZR, Corsair CM32GX4M2C3466C16, or G.Skill F4-3600C16D-32GTZNC

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post #11537 of 11995 (permalink) Old 02-18-2020, 08:13 PM
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Quote: Originally Posted by bei fei View Post
I am looking to upgrade my ram. I currently have 2x16Gb Corsair Dominator 3000 C15 which uses Hynix AFR chips.

What is the best option with my Asrock Z390 Phantom ITX?

I am looking at G.Skill F4-3200C14D-32GTZR, Corsair CM32GX4M2C3466C16, or G.Skill F4-3600C16D-32GTZNC
Purely performance based I would go the F4-3200C14D-32GTZR or some F4-3600C16D-32GTZR from what I have seen folks around here saying.
I don't however have any personal experience
Edit: Neither of which is on your QVL

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post #11538 of 11995 (permalink) Old 02-19-2020, 07:33 AM
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К слову, 3200C12

А также 3733C14...
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post #11539 of 11995 (permalink) Old 02-19-2020, 10:56 AM
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Ok guys so referencing this post.

https://www.overclock.net/forum/5-in...l#post27784556

Above should be sticky imo ^^

Anyway

He first off states only raise frequency if latency isnt compromised.

Ironically the combination for me a speed/latency combo that is barely mentioned anywhere.

For reference I have samsung B die.

Which is 3000mhz and CAS 12

3000/12 = 250

Other combinations are all inferior. Some dont even post.

3000/12=250, posts and passes stability tests, used as daily driver config for many months. Needs 1.45v
3200/14=228, XMP spec of my ram, posts and stable (on this 9900k, wasnt on my 8600k, which was the reason I started using the 3000/12 config), this is significantly inferior on latnecy on AIDA64 and interestingly caues one of my favourite games to stutter much more than 3000/12. Much lower voltage than 3000/12 needed.
3200/13=246, this would have been great, but even at 1.45v doesnt even post.
3333/14=238, have managed to boot into windows, no stability test carried out yet. Really want to get closer to the latency of 3000/12.
3400/14=242, doesnt post
3400/15=226, posts but as crappy as 3200/14 for latency

Not tried anymore, as I feel getting close to 3000/12 latency at very high frequencies is not going to happen, 3000/12 seems godly yet noone uses it?

So the question is, if you was in same situation, would you favour 3000 with cas 12? Also 3000 with Cas 12 has almost same bandwidth on AIDA64 as 3000CL14 XMP, but If I tune the 3200 config a bit it pulls away somewhat, same with 3333mhz, however if I do a % calculation, the % increase in bandwidth is a fraction of the % decrease in latency, and latency seems to be benefit software more?

Latency as reported in AIDA64

3000 40-42ns
3200 47-48ns tuned 45-47ns
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post #11540 of 11995 (permalink) Old 02-19-2020, 11:47 AM
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Quote: Originally Posted by chrcoluk View Post
Ok guys so referencing this post.

https://www.overclock.net/forum/5-in...l#post27784556

Above should be sticky imo ^^

Anyway

He first off states only raise frequency if latency isnt compromised.

Ironically the combination for me a speed/latency combo that is barely mentioned anywhere.

For reference I have samsung B die.

Which is 3000mhz and CAS 12

3000/12 = 250

Other combinations are all inferior. Some dont even post.

3000/12=250, posts and passes stability tests, used as daily driver config for many months. Needs 1.45v
3200/14=228, XMP spec of my ram, posts and stable (on this 9900k, wasnt on my 8600k, which was the reason I started using the 3000/12 config), this is significantly inferior on latnecy on AIDA64 and interestingly caues one of my favourite games to stutter much more than 3000/12. Much lower voltage than 3000/12 needed.
3200/13=246, this would have been great, but even at 1.45v doesnt even post.
3333/14=238, have managed to boot into windows, no stability test carried out yet. Really want to get closer to the latency of 3000/12.
3400/14=242, doesnt post
3400/15=226, posts but as crappy as 3200/14 for latency

Not tried anymore, as I feel getting close to 3000/12 latency at very high frequencies is not going to happen, 3000/12 seems godly yet noone uses it?

So the question is, if you was in same situation, would you favour 3000 with cas 12? Also 3000 with Cas 12 has almost same bandwidth on AIDA64 as 3000CL14 XMP, but If I tune the 3200 config a bit it pulls away somewhat, same with 3333mhz, however if I do a % calculation, the % increase in bandwidth is a fraction of the % decrease in latency, and latency seems to be benefit software more?

Latency as reported in AIDA64

3000 40-42ns
3200 47-48ns tuned 45-47ns
3333 43-45ns
Forget about this

Tune 2. And 3. Timings, and you have a new sport

Look at the aida 64 results in this thread vs different timings 1. - 2. And 3. Timings.

Example: 4000c17 on 9900k can do latency from "~38ns to ~52ns" depending on tweaked 2. Timings and 3. Timings

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