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Thread: NEW!!! DRAM Calculator for Ryzen™ 1.6.2 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench) Reply to Thread
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  Topic Review (Newest First)
09-15-2019 09:28 AM
Acidstorm
Quote: Originally Posted by kenny0048 View Post
I use 3900X + X570 Aorus Elite + PATRIOT Viper Steel 4133 8GBx2 @3733 CL16, but the latency is around 65ns.
Membench (latency test) is affected by the power plan, so you may want to set it to “High Performance”.
https://imgur.com/QY2VLXm.png
I unlocked the 'Ultimate Performance' setting, but doesn't seem any different than 'High Performance'. Think I'll run a couple benchmarks and see if there is any difference.
09-15-2019 09:15 AM
kenny0048
Quote: Originally Posted by Synoxia View Post
Jesus christ. I run 3800 c15 and my latency isn't as low as this guy. Could 3900x vs 3700x be worth 3NS whole of latency? I have 65.5 with 3800 c15-16-17-16-30-45... might you share your settings?
I use 3900X + X570 Aorus Elite + PATRIOT Viper Steel 4133 8GBx2 @3733 CL16, but the latency is around 65ns.
Membench (latency test) is affected by the power plan, so you may want to set it to “High Performance”.
https://imgur.com/QY2VLXm.png
09-14-2019 10:42 PM
Acidstorm
Quote: Originally Posted by Synoxia View Post
Jesus christ. I run 3800 c15 and my latency isn't as low as this guy. Could 3900x vs 3700x be worth 3NS whole of latency? I have 65.5 with 3800 c15-16-17-16-30-45... might you share your settings?
I run 2800 with CL14 and have run it with CL12, but takes more volts, on my RAM, and I used to get 60 NS latency, but even with those timings I've used forever, the only thing I changed was the BIOS, now I'm closer to 90 NS latency. I'm not happy with that at all. Those BIOS updates are effecting first gen Ryzen in a bad way, and I don't think it should be. But I've had the same CPU, Mobo, and RAM since I bought this gear back in 2017. I haven't even installed a new Windows install since then either. Maybe it could be MS with their ****ty updates of late, but I noticed this right after a BIOS update, and it hasn't gotten better with subsequent BIOS updates.
09-14-2019 05:50 PM
Synoxia
Quote: Originally Posted by ComansoRowlett View Post
He has a dual rank kit, you probably have a single rank kit. Can make a decent difference.
Shouldn't 3800 c14 kit be single rank? That has still a latency of 62.7 :/
09-14-2019 05:34 PM
ComansoRowlett
Quote: Originally Posted by Synoxia View Post
Jesus christ. I run 3800 c15 and my latency isn't as low as this guy. Could 3900x vs 3700x be worth 3NS whole of latency? I have 65.5 with 3800 c15-16-17-16-30-45... might you share your settings?
He has a dual rank kit, you probably have a single rank kit. Can make a decent difference.
09-14-2019 04:36 PM
Synoxia
Quote: Originally Posted by wesley8 View Post
Test with several memory sets,such as single ranks bdie and dual ranks bdie & CJR. Included: 3800c16 dual ranks bdie & CJR,3800c14 single ranks GDM ON & OFF, 4400c16 single ranks GDM ON & OFF.(All tests passed MT 300%)

Final decision to use dual ranks BDIE memory set, timings 3800c16-17-16-28-42 1T tRFC260 GDM ON 1.45v .
Jesus christ. I run 3800 c15 and my latency isn't as low as this guy. Could 3900x vs 3700x be worth 3NS whole of latency? I have 65.5 with 3800 c15-16-17-16-30-45... might you share your settings?
09-13-2019 09:02 AM
mongoled
Quote: Originally Posted by Ironcobra View Post
power down disabled

Got these settings stable at 64.9 latency, I discovered 1usms ryzen overclocking guide and that was very helpful. Dont know how I missed that all this time.
Thats better


09-13-2019 05:29 AM
Ironcobra
Quote: Originally Posted by Saiger0 View Post
PDM enabled?
power down disabled

Quote: Originally Posted by mongoled View Post
Row Cycle Time is too low, try 42, 44

Tfaw is too high, try 16, 18, 20
Quote: Originally Posted by Saiger0 View Post
PDM enabled?
Got these settings stable at 64.9 latency, I discovered 1usms ryzen overclocking guide and that was very helpful. Dont know how I missed that all this time.
09-12-2019 08:43 AM
Saiger0
Quote: Originally Posted by Ironcobra View Post
Im really struggling to see where most of you guys really kill my tridentz in latency, I havent been able to get under 66ns with 3800. Should I be concerned here or am I chasing the dragon. Any help would be appreciated.
PDM enabled?
09-12-2019 08:27 AM
mongoled
Quote: Originally Posted by Ironcobra View Post
Im really struggling to see where most of you guys really kill my tridentz in latency, I havent been able to get under 66ns with 3800. Should I be concerned here or am I chasing the dragon. Any help would be appreciated.
Row Cycle Time is too low, try 42, 44

Tfaw is too high, try 16, 18, 20
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