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Asrock x399 Taichi/Fatality overclocking and unofficial support

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post #611 of 744 (permalink) Old 01-25-2019, 12:02 AM
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Quote: Originally Posted by dalathegreat View Post
Maybe I'll hold out a bit still then.

On another aspect, I tried setting "Memory Interleaving" to "Channel" instead of auto. It lowered my latency from 100ns->70ns, and memory read went from 55gbps ->75gbps. This option was found under Common DF settings in the bios.

Anyone else tested this?
I tested on my board and found similar to your results. When I changed to Channel instead of Auto, my latency dropped from 102ns to 60ns but my memory read went 87Gbps to 50Gbps. There is an advantage to more channel bandwidth. Depends on your workload. I'm sure a gamer would enjoy the lower latency and not be too worried about a drop in memory transfer rate but a person running a creative workload might not care overall about latency and be concerned more with the workload throughput.

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post #612 of 744 (permalink) Old 01-31-2019, 03:07 AM
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Quote: Originally Posted by Keith Myers View Post
I tested on my board and found similar to your results. When I changed to Channel instead of Auto, my latency dropped from 102ns to 60ns but my memory read went 87Gbps to 50Gbps. There is an advantage to more channel bandwidth. Depends on your workload. I'm sure a gamer would enjoy the lower latency and not be too worried about a drop in memory transfer rate but a person running a creative workload might not care overall about latency and be concerned more with the workload throughput.
Hmm, but my memory read also went UP! So it's a win/win in both latency and speed. This might be because I'm running an 1900X processor? I will definitely keep it on Channel mode, the gains are amazing.

Here is my known good 24/7 BOINC overclock. Also running a 1080TI.


I actually have been working on further tightening subtimings, so initial results is down to 70.1ns latency. I'm unsure about stability, so I'll let it run for a week before declaring it stable.

I love the threadripper platform. It's so fun and addictive to finetune it
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post #613 of 744 (permalink) Old 01-31-2019, 12:24 PM
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Quote: Originally Posted by dalathegreat View Post
Hmm, but my memory read also went UP! So it's a win/win in both latency and speed. This might be because I'm running an 1900X processor? I will definitely keep it on Channel mode, the gains are amazing.

Here is my known good 24/7 BOINC overclock. Also running a 1080TI.


I actually have been working on further tightening subtimings, so initial results is down to 70.1ns latency. I'm unsure about stability, so I'll let it run for a week before declaring it stable.

I love the threadripper platform. It's so fun and addictive to finetune it
The cpu is capable of more speed from the memory if you have an even mediocre IMC and decent memory. I have my 2920X running @ 3400 CL14 with the Calculators FAST settings.

If you want to push the edge of the envelope, there are even more memory settings to play with besides secondary timings. I have this note from another OCN TR overclocker.

"Also don’t forget the set the AMD CBS options for memory to Channel, 512, hash enable and mem clear disabled. Opcache enabled, Streaming Stores enabled, HW Prefetcher enabled, determinism set to Performance"

You tested memory throughput with AIDA64 which I don't have access to in Linux. I tested with the Intel Memory Latency Checker and the memory tests and benchmarks in Geekbench4. So that probably explains the differences in what we saw for Channel interleaving on our two platforms.

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post #614 of 744 (permalink) Old 02-02-2019, 02:00 PM
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Has anyone had trouble getting the x399 Fatality to turn on? I finally got around to putting together my new Threadripper build and I get only a blinking red light under the heat sink to the right of the PCIE slots when I turn on the PSU, the power button on the motherboard does nothing and there are no error codes. I also tried the Flashback procedure but nothing seems to happen at all when I press the bios flashback button, it doesn't even light up. I'm currently testing it outside of the case.

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post #615 of 744 (permalink) Old 02-03-2019, 02:57 PM
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Try a different power supply. Reduce down to one stick of memory and the cpu. Likely a bum cpu or motherboard.

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post #616 of 744 (permalink) Old 02-04-2019, 05:53 PM
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Got a Question on the Slot 1 - 4 spacing on the TaiChi since I'm looking at one for a CrossFire Setup

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post #617 of 744 (permalink) Old 02-08-2019, 05:06 AM
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Quote: Originally Posted by Keith Myers View Post
...
"Also don’t forget the set the AMD CBS options for memory to Channel, 512, hash enable and mem clear disabled. Opcache enabled, Streaming Stores enabled, HW Prefetcher enabled, determinism set to Performance"
...
Wow! This netted me another 1ns reduction in memory latency!

The settings were spread out under CBS / DF subpages in the BIOS. Didn't seem to affect stability in any negative way, been running this a few days 24/7 loaded now. Thanks Keith!
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post #618 of 744 (permalink) Old 02-19-2019, 06:26 AM
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Anyone know if there is a way to set a voltage offset when doing PBO fatality and 2950x bios 3.5
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post #619 of 744 (permalink) Old 02-25-2019, 11:05 PM
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Quote: Originally Posted by andrewjoy View Post
Anyone know if there is a way to set a voltage offset when doing PBO fatality and 2950x bios 3.5
Does this apply to our motherboards too?

"MSI added offset voltage to their AM4 BIOS so here's how to use it with PBO"
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post #620 of 744 (permalink) Old 03-13-2019, 04:50 AM
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Anyone planning to get a 3XXX Threadripper CPU when they launch with this board?
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