[Official] AMD Ryzen DDR4 24/7 Memory Stability Thread - Page 253 - Overclock.net - An Overclocking Community

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post #2521 of 2907 (permalink) Old 05-17-2019, 05:59 AM
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Quote: Originally Posted by 1TM1 View Post
moving to samsung chips. Recent deal on https://www.overclock.net/#/topics/1725394
received mine, manufactured April 2019, price drop $134 https://m.newegg.com/product/N82E16820232217

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post #2522 of 2907 (permalink) Old 05-18-2019, 12:49 PM
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I never knew you could set tWRWRSC/tWRWRSD and tRDRDSD/tRDRDDD to the same value. Everything I've seen always has them varied by 2. 7/7 5/5 or 6/6 4/4 or 5/5 3/3. But then I looked at the preset on the CH7 for 3466MHz and it's set up as 4/4 4/4.
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post #2523 of 2907 (permalink) Old 05-20-2019, 09:24 AM
 
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Quote: Originally Posted by lDevilDriverl View Post
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Hello, may I ask if you use ice or other subzero condition to achieve this 3733cl12 or 4000cl14? These timings are amazing, and put huge pressure on soc @Ambient .

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post #2524 of 2907 (permalink) Old 05-20-2019, 01:01 PM
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despite what dram calculator says no way any rec,alt,alt2-3 work. Either NO POST yellow dram light or restart from prime95 after 2-4h with yellow light

I started challenging the common settings, in groups

Clkdrvstr, addcmddrvstr, csodtdrvstr, ckedevstr,
rttmom-rttpark (rttwr disable) and bus timings
Higher voltages
Lower voltages

skip ahead 7 days of testing, cad bus block drvstr ohms are too low. 3600mhz 60-60-60-60 ohms, 3533mhz 40-40-40-40 ohms.

Even if 3600mhz fails its shown much more stability. I'm already 50mins into prime95 while 20,24,30 ohm would fail first 10mins

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post #2525 of 2907 (permalink) Old 05-20-2019, 03:16 PM
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In 1.5.1 which topology should be chisen for a taichi x470? X470 or dual?

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post #2526 of 2907 (permalink) Old 05-20-2019, 03:31 PM
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I'm sure this has been asked before, but I can't find it in search and it's a really long thread to look all the pages.

In the first post there were 16 threads of memtest with 850mb each = 13600mb total memory. If I have a R5 2600 and 16gb ram, should I use 12 threads with 850mb each or the amount necessary to get 13600mb used in total (1133mb)?
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post #2527 of 2907 (permalink) Old 05-20-2019, 04:50 PM
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Quote: Originally Posted by Dezterity View Post
I'm sure this has been asked before, but I can't find it in search and it's a really long thread to look all the pages.

In the first post there were 16 threads of memtest with 850mb each = 13600mb total memory. If I have a R5 2600 and 16gb ram, should I use 12 threads with 850mb each or the amount necessary to get 13600mb used in total (1133mb)?
Same amount of total memory just divide by 12 instead of 16 (850mbs per is what I use on my 2700x).
Thread count to match number of instances of MemTest, each instance to run with equal amount.


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post #2528 of 2907 (permalink) Old 05-21-2019, 02:05 AM
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Running at 1.4V, tightened what I could. Tried 3533 and it spits some errors, sometimes after 6000% in RAM test. Disabling Geardown mode is a no-no on this CPU, and it doesn't like tRCDRD at 14.
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post #2529 of 2907 (permalink) Old 05-21-2019, 02:27 AM
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I got the geardown mode on just will bypass some tightened values making it pointless, or am I wrong?

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post #2530 of 2907 (permalink) Old 05-21-2019, 03:01 AM
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It overwrites the command rate, even if I don't exactly know how it works. I don't really have a choice, if I disable, I get a crazy amount of errors. My R5 1600 was fine with it disabled.

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