[Official] AMD Ryzen DDR4 24/7 Memory Stability Thread - Page 425 - Overclock.net - An Overclocking Community

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[Official] AMD Ryzen DDR4 24/7 Memory Stability Thread

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post #4241 of 4414 (permalink) Old 08-01-2020, 09:22 AM
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Quote: Originally Posted by rares495 View Post
I could never post with tRDWR 7 even with tRCDRD 14. I might try again but I don't think it will work.
At least 7/4 should work
if not even 7/2 SCL2 - else 7/4 SCL 3, 7/3 SCL >4
Ruleset is, that it should come close to tRCD but not exceed it

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post #4242 of 4414 (permalink) Old 08-01-2020, 10:39 AM
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Quote: Originally Posted by Veii View Post

Try it out,
Capacitor discharge is Temp related, but i haven't seen anyone go under tRC*6 , *5 should be possible but i haven't gotten my hands on anything to work personally on recently
Voltage should only increase heat - it will increase the amount of charge and up to your timings, more will be left
But then higher heat has a negative effect and they will lose even faster the charge
tRP is there to adjust and help on this "issue"

If your dimms get too hot, increase tRP
If you want less vDIMM, increase tRP
if you want to meet a tRFC target, decrease tRP and increase voltage
Only increasing voltage won't really grant you a good tRFC ~ as neverless what fixed refresh-cycle-delay you pick, tRP same as tRAS has to pass before anything can happen. The same goes for tRC, nothing will happen till that one elapses and tRAS being the only one that is autocorrected if it's ACTIVE timing ends up being too short.
Tested some more adventures in flat 14s, increasing tRFC and lowering vdimm by 0.2v with the windows open so hottest dimm is 21c at idle is stable until they heat up to 29.5c.

21>29.5 with worse tRFC is only enough breathing room to run Karhu for 10 minutes, but in four test>error>cooling cycles the errors only occurred above 29.5c with the longest at 30.5c.

This is the coldest night forecast for the few weeks though so that's about all I can check.
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post #4243 of 4414 (permalink) Old 08-01-2020, 11:06 AM
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Quote: Originally Posted by Ortus View Post
Tested some more adventures in flat 14s, increasing tRFC and lowering vdimm by 0.2v with the windows open so hottest dimm is 21c at idle is stable until they heat up to 29.5c.

21>29.5 with worse tRFC is only enough breathing room to run Karhu for 10 minutes, but in four test>error>cooling cycles the errors only occurred above 29.5c with the longest at 30.5c.

This is the coldest night forecast for the few weeks though so that's about all I can check.
I'm guessing it's the GDM off. Do you normally run GDM off?

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post #4244 of 4414 (permalink) Old 08-01-2020, 11:07 AM
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Quote: Originally Posted by Veii View Post
At least 7/4 should work
if not even 7/2 SCL2 - else 7/4 SCL 3, 7/3 SCL >4
Ruleset is, that it should come close to tRCD but not exceed it
I can't POST 7/4 either.

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post #4245 of 4414 (permalink) Old 08-01-2020, 12:05 PM
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Quote: Originally Posted by Ortus View Post
Tested some more adventures in flat 14s, increasing tRFC and lowering vdimm by 0.2v with the windows open so hottest dimm is 21c at idle is stable until they heat up to 29.5c.

21>29.5 with worse tRFC is only enough breathing room to run Karhu for 10 minutes, but in four test>error>cooling cycles the errors only occurred above 29.5c with the longest at 30.5c.

This is the coldest night forecast for the few weeks though so that's about all I can check.
Nice OC, truly, but this really isn't the thread for this type of thing.

This is the Ryzen 24/7 stable Memory OC thread. Submissions should include screen shots of your memory settings and valid testing results as described in the first post; and should be, exactly as the subject implies, 24/7 stable. Not stable for 10 test loops until your memory gets to only 30.5'C and requires open windows and only on the coldest night in weeks.
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post #4246 of 4414 (permalink) Old 08-01-2020, 12:07 PM
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Quote: Originally Posted by Gadfly View Post
Nice OC, truly, but this really isn't the thread for this type of thing.

This is the Ryzen 24/7 stable Memory OC thread. Submissions should include screen shots of your memory settings and valid testing results as described in the first post; and should be, exactly as the subject implies, 24/7 stable. Not stable for 10 test loops until your memory gets to only 30.5'C and requires open windows and only on the coldest night in weeks.
I can see where you're coming from, but I think people making attempts at 24/7 stability and showing what isn't working is helpful too.

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post #4247 of 4414 (permalink) Old 08-01-2020, 12:11 PM
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Quote: Originally Posted by Gadfly View Post
Nice OC, truly, but this really isn't the thread for this type of thing.

This is the Ryzen 24/7 stable Memory OC thread. Submissions should include screen shots of your memory settings and valid testing results as described in the first post; and should be, exactly as the subject implies, 24/7 stable. Not stable for 10 test loops until your memory gets to only 30.5'C and requires open windows and only on the coldest night in weeks.
This and the DRAM Calculator thread are not limited to their respective topics anymore. It's all about memory OC anyway. It would be very boring to see people just post results in here.

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post #4248 of 4414 (permalink) Old 08-01-2020, 12:19 PM
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So experimenting with values I have never tried before.

I got two completed runs (1st run passed, reboot, 2nd run passed) with the same settings as in screen shot below, but with tRP at 14.

But did not really see any performance benefits from the settings in my sig.

Dropping tRP to 12 clearly brought better performance, though I now have two new errrors.

Error 14,which Veii has explained as

Quote: Originally Posted by veii
- it can error after the 2nd or 3rd pass if something is off my some ns and just "got lost"
- i often hit it after 31min when the test takes 32min - can be heat related but then it's main reason is micro timeout x_x
But ive never come across an explanation for error 9.

Id love to get this stable, looks to be alot closer to stabilty than trying to run tRCDRD at 14!

Would increaing ClkDrvStrength help with these types of error as i have it set to 20 ohms .....
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post #4249 of 4414 (permalink) Old 08-01-2020, 12:27 PM
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Quote: Originally Posted by Gadfly View Post
Nice OC, truly, but this really isn't the thread for this type of thing.

This is the Ryzen 24/7 stable Memory OC thread. Submissions should include screen shots of your memory settings and valid testing results as described in the first post; and should be, exactly as the subject implies, 24/7 stable. Not stable for 10 test loops until your memory gets to only 30.5'C and requires open windows and only on the coldest night in weeks.
This is 100% correct, though its been quite a long time that this thread had deviated from its original intent.

I think one of the reason is because there are not so many people posting at forums such as this one anymore, well at least compared to what it was like in its "heyday" so because of this the posting regards anything to do with RAM overclocking is stuck mainly in two threads .......

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post #4250 of 4414 (permalink) Old 08-01-2020, 02:32 PM
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Quote: Originally Posted by nick name View Post
I can see where you're coming from, but I think people making attempts at 24/7 stability and showing what isn't working is helpful too.
do it in another thread. This is supposed to help people find and compare stable results.
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