Overclock.net - An Overclocking Community - View Single Post - NEW!!! DRAM Calculator for Ryzen™ 1.6.2 (overclocking DRAM on AM4) + MEMbench 0.8 (DRAM bench)

View Single Post
post #3363 of (permalink) Old 10-31-2018, 07:50 AM - Thread Starter
AMD overclocker/developer
1usmus's Avatar
Join Date: Jun 2017
Location: Ukraine / Germany
Posts: 1,587
Rep: 294 (Unique: 137)
Advanced instructions : DRAM Calculator for Ryzen ™ 1.4.0 and newer versions

Advanced instructions : DRAM Calculator for Ryzen ™ 1.4.0 and newer versions.

Attention. This program is not a 100% tool - an assistant to optimize your memory. The results are fundamentally influenced by many factors: the quality of the memory controller in your processor, the memory you use and the motherboard. In any case, you will need attention and a little time.

Step 1. In the picture in the red frame. We need to choose the type of memory and version of the profile. The profile version is the 2 preset V1 and V2 built into the calculator for each memory type, they store data on RAM delays for Ryzen systems. Do not confuse and compare with Intel XMP, memory controllers are different. In most cases, it is recommended to use the profile V1, this profile is “popular”, suitable for most users. Profile V2 is an alternative, it is designed for systems that are not approached profile V1 (no start of the system or a lot of errors). And press the "R-XMP" button.


The third profile has the name "debug", it exists for advanced users and for situations when the profile V1 and V2 did not fit at all. We must manually import the data for it from Thaiphoon. Video instruction here >>


Step 2. In the picture in the red frame. We must choose the number of RAM modules that are installed in the motherboard, memory ranks. Select the frequency of the RAM you want to receive. Select BCLK (default is 100 MHz on all systems). Select the generation of the processor and the task for the system (synthetics or games).


Step 3. Click the Calculate SAFE or Calculate FAST button. The program will calculate.

Step 4. The picture is a green frame. We will have to enter the obtained data into the BIOS.


Step 5. We are testing the stability of our system. If everything is good - I congratulate you, if there is no stability - you will need the next step.

Step 6. Blue frame. The voltage limits for our SOC and DRAM are indicated, we have to check the neighboring voltages and check the system again for stability. Often this step will lead to success.
Pink frame. We may need to check the impedance settings + to check the SOC and DRAM voltages again to get stability.
Orange frames. Setting the quality of the bus signals that links the RAM and our processor (memory controller). Similarly to the previous points, we can check alternatives.


Step 7. For particularly difficult situations, there is this step and the "Advanced" tab. Black frames. We must enter into the BIOS these recommendations or alternatives that the program offers.


Nuances to help you set up your system.

* Do not use too high voltages for SOC and DRAM. The calculator will tell you in which framework you should look for a stable result. Always start debugging the system with these voltages.

* Always use extra cooling for RAM. The less heat, the more stable your system.

* A change to procODT or RTT is required when the system does not start, has a huge number of errors, or a BSOD occurs.

* Single and rare errors can be cured by manually sorting such timings: tFAW (from 16 to 36), by increasing tRRDS by 1 or 2, by changing tRTP (from 8 to 12).

* Single and rare errors can be cured by changing tRDWR (from 6 to 9) and tWRRD (from 1 to 4). Note that timings must be configured in pairs. Example: tRDWR 6 tWRRD 2, tRDWR 6 tWRRD 3, tRDWR 6 tWRRD 4, tRDWR 7 tWRRD 1, and so on.

* Single and rare errors can be cured with the help of the tRFC change, the calculator offers you another alternative tRFC. You can also round the recommended number. tRFC 2/4 is not necessary to configure.

* Improve system stability can Geardown enabled.

* Improve the stability of the system can VDDP, the recommended framework from 855mv to 950mv. Step 15mv.

* Spread spectrum disabled can improve the stability of the system.

* The source of errors can also be Windows, not necessarily a problem in overclocking.

* Regularly update the BIOS. It is recommended to update it with afuefix64, instructions can be found here >> https://www.overclock.net/forum/11-a...correctly.html or ask on the forum (there are special cases and in order to avoid problems it is better to ask).

* Increasing tRCDRD and tRP by 1 can improve stability and reduce memory voltage requirements .

Last edited by 1usmus; 10-31-2018 at 10:04 AM.
1usmus is offline