3600 cl14 bargain

Space Monkey said:
Is this definitely Samsung B-Die?

What's the chances of the 4000mhz stuff doing 3600mhz at low latencies? I'm on the AMD X399 TR platform :)
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Could do with someone taking one of the team with the lower latency kits and seeing if they are A2.

If we can get a confirmed A2 set of 16GB I will buy a couple of kits to test.

Nobody is setting DDR4 world records with B-Die anymore its all switching to binned A2 kits at C14.
 
Besty said:
Could do with someone taking one of the team with the lower latency kits and seeing if they are A2.

If we can get a confirmed A2 set of 16GB I will buy a couple of kits to test.

Nobody is setting DDR4 world records with B-Die anymore its all switching to binned A2 kits at C14.
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are 16gb kits available in a die atm? Even if they were, they would most definitely command a premium over b die. As for world records, I think most people are just looking for high performance ram at a reasonable price.
 
Patriot Viper steel 4400 16gb timings at CL14 rock solid.
These are much tighter than i could get my 8 pack 4000 to run they just fell over at the mere mention of CL14 let alone tight timings.
After importing XMP from Thaiphoon Dram calculator tells me the memory is 94% quality
The only change from the printout is I have to run Gear down to get the above stable.

https://imgur.com/a/iZ4DJaM
 
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Dtshaw said:
Thanks mate!. Yeah, we're around the same it seems. i am 16-16-16-30 (3733mhz) at 1.42 volts at the moment. I did try to push for CL15/14 but.. don't really wanna life push above 1.45 on the memory. :p
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I can post with 3733/1866IF @ cl14, but needs 1.5v and other v’s ramped up. Still unstable with that. I may try gear down mode enabled as others have suggested this helps with stability. I’d love to get the latency to be sub 65ns, but tbh I’m perfectly happy with performance and will probably wait for a bios update.
 
Masteri3laster said:
I can post with 3733/1866IF @ cl14, but needs 1.5v and other v’s ramped up. Still unstable with that. I may try gear down mode enabled as others have suggested this helps with stability. I’d love to get the latency to be sub 65ns, but tbh I’m perfectly happy with performance and will probably wait for a bios update.
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The consensus seems to be 1.5 to 1.6 being safe with Samsung b-die having a larger lithography and can take it (also why it likes it ...)

I dunno about how safe that is for the cpu, but not finding many, erm any? examples of ryzen death cause of that.

Aw what the hell, let's rub the lamp and see if we can get the real deal in here to confirm!

* rubs lamp @8 Pack *

Dear Mr Genie Sir 8 pack Sir, who art in overclocking heaven, could you please confirm or deny the above? Thanks :p
 
Masteri3laster said:
I can post with 3733/1866IF @ cl14, but needs 1.5v and other v’s ramped up. Still unstable with that. I may try gear down mode enabled as others have suggested this helps with stability. I’d love to get the latency to be sub 65ns, but tbh I’m perfectly happy with performance and will probably wait for a bios update.
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Yeah, i tried all that power down mode/OHM/Geardown, etc.. at 1.45 and wasn't having any of it. I have not tried 1.5V atm but i am happy with 66ns and current settings, not to mention it's a A LOT of work/testing for next to little gains. :P
 
RAM arrived today, Literally only had 5 minutes with this, used Ryzen DRAM Calculator to get 3600 C16 on the first generation Threadripper, decent result so far :cool:

Particularly noteworthy because it would struggle to get past 3000MHz on other RAM, plus it wouldn't do these speeds on either XMP or manual menu selection, but once I entered all the figures from the Ryzen DRAM Calculator individually it worked first time, this is quad channel as well :)

32GB (4x8Gb)

QZddnKy.jpg.png
 
8pack RAM is really good. Overclocked 3600CL16 @3800CL15. For some reason writes are half the amount of reads on the 3700x/3800x, this is by design source AMD.

DRAM Calculator for Ryzen Easy test 102.6 seconds.


Aida 64


Maxmem2


RAM settings


Compared to https://forums.overclockers.co.uk/members/threepwood.120912/ post, my CL15 is faster than his CL14. I found the same thing when I was at CL14, it gets harder to keep all the other timings as fast. So basically you use a lot of voltage getting the lower CL value but you don't see any real world benefit. DRAM Calculator for Ryzen, "Easy test" is another way to check performance. See if you can get 102.6 seconds. I can get as low as 99 seconds but its not worth it, for all the extra volts that are required. Compared to CL14 I should not be nearly 1ns faster. I am already 1ns slower than I should be at CL15. Could do with some help with the timings.

Maxmem2 CL14
https://i.imgur.com/XS1vVWp.jpg
 
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I would try Dancops A2-die settings from hwbot forum.

I can do 4000C14 on intel with my pair of sticks but they need 1.55v.
 
It's more the overall latency I think would be more important than the CL value. 3800 16-10-17-14-24-40 for example has a latency of 62.8ns in aida64 @ 1.455volts Stress Test - https://imgur.com/a/KMyY2oK, Aida https://imgur.com/a/P2LAGKx https://docs.google.com/spreadsheets/d/1c3RTF_ZPjep-Zfimgoca2Ef1gSjZM0rSHVWLkknbfUI/edit#gid=0 Yet I have CL15 but have a latency of 64ns. Other timings are just as important. He has a little less overall performance.

I 'think' the lower the latency the more in game FPS you can push.
 
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zx128k said:
Compared to https://forums.overclockers.co.uk/members/threepwood.120912/ post, my CL15 is faster than his CL14. I found the same thing when I was at CL14, it gets harder to keep all the other timings as fast. So basically you use a lot of voltage getting the lower CL value but you don't see any real world benefit. DRAM Calculator for Ryzen, "Easy test" is another way to check performance. See if you can get 102.6 seconds. I can get as low as 99 seconds but its not worth it, for all the extra volts that are required. Compared to CL14 I should not be nearly 1ns faster. I am already 1ns slower than I should be at CL15. Could do with some help with the timings.

Maxmem2 CL14
https://i.imgur.com/XS1vVWp.jpg
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For the cl14 I need to use the gear down option (T1.5), if I could do cl15 T1 I would deffo go for that!

But cl15 geared down does not produce faster results than cl14 geared down for me, is every result consistently faster for you with cl15 vs cl14?
 
Threepwood said:
For the cl14 I need to use the gear down option (T1.5), if I could do cl15 T1 I would deffo go for that!

But cl15 geared down does not produce faster results than cl14 geared down for me, is every result consistently faster for you with cl15 vs cl14?
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I had the same issues, the lower the CL the more voltage I had to use. I have read 8-packs posts that my RAM is safe at 1.45volts. Just don't want to run at 1.5volts or close, to try and get cl14. The lower CL the more you have to understand what the timings do. 8-pack was right to pick b-die from samsung, it just works.

I have made a lot of silly timing mistakes that cost me a lot of performance. TwrwrScL was set to 4 and TrdrdScL was set to 2. This cost me 100s of points in time spy.
 
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