Amd Auto Tune Gpu

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I have an R9 290 graphics card. I just upgraded from Win7 to Win10 (clean install) so I have fresh drivers. I immediately noticed a severe drop in framerate on games though, which probably means I had my card overclocked before and the settings are default now. So far no problem. Then I went to enable overdrive in CCC, still no problem yet. But, I remember there being an auto-tune button that would gradually work its way through various clocks and voltages etc to find the maximum stable configuration. That button seems to be absent. Is it supposed to be there or has it been removed? I've already checked to make sure I have the most updated driver (which of course I do, I just downloaded it). I am able to overclock the card manually, but I admit I don't know enough to be comfortable doing so. I'd much rather use the automated process. Can someone help me get it back?

How NVIDIA’s Latest Innovation Can Automatically Tune Up Your Favorite Games. January 25, 2013 by Brian Caulfield. 0 Shares Email. PCs can be built using tens of thousands of different combinations of GPU, CPU, and operating system, among other variables. As a result, a PC game can have as many as a million possible combinations of. Performance Tuning is AMD’s groundbreaking tweaking and overclocking tool that allows gamers to overclock or undervolt their GPU, controlling both engine and memory clocks, as well as adjusting fan speeds to their desired setting.

Content Overview

Tune GPU core, memory clocks, voltage, or fan speeds for up to four graphics cards independently by clicking the numbers 1-4, or all cards simultaneously by clicking 'Sync all cards'.
Jan 30, 2011 This video shows you how to Overclock your ATI or AMD graphics card using AMD Overdrive.Voltages cannot be change with AMD Overdrive.More testing should be done on graphics card after AMD.
The GPU-Z can support leading GPU brands such as Intel graphics, AMD, ATI, and NVIDIA, allowing users to validate and document the performance of their product. The software has a simple, user-friendly interface through which it displays information on GPU performance, including default clocks, overclock, and 3D clocks (if available).

NVIDIA Backend
AMD Backend
CPU Backend

Benchmark

You can benchmark the miner in two ways:

Edit config.txt and set verbose_level to 4 and h_print_time to 30 and start the miner. You will see hash report each 30 seconds.
Start the miner with the cli option --benchmark BLOCKVERSION. The miner will not connect to any pool and performs a 60sec performance benchmark with all enabled backends.

Windows

'Run As Administrator' prompt (UAC) confirmation is needed to use large pages on Windows 7.On Windows 10 it is only needed once to set up the account to use them.Disable the dialog with the command line option --noUAC

Managing GPUs

To turn on and off a GPU you need to add/remove config set to GPU_threads_conf.index is the number of the GPU, the index order not follow the order from nvidia-smi or the order shown in windows.

NVIDIA Backend

By default the NVIDIA backend can be tuned in the config file nvidia.txt

Choose Value for `threads` and `blocks`

The optimal values for the threads and blocks parameters in nvidia.txt depend on your GPU model and selected mining algorithm.For all GPU's with a compute capability >=2.0 and <6.0 there is a restriction of the amount of vRAM that can be used for the mining algorithm.The maximum vRAM that can be used must be less than 2GB (e.g. GTX TITAN) or 1GB (e.g. GTX 750-TI).The amount of vRAM used for mining can be changed with 'threads' : T, 'blocks : B'.

T = threads used per block
B = CUDA blocks started (should be a multiple of the multiprocessors M on the GPU)

For the 2GB limit the equations must be full filled: T * B * 2 <= 1900 and B mod M 0.The value 1900 is used because there is a little data overhead for administration.The GTX Titan X has 24 multiprocessors M, this means a valid and good starting configuration is 'threads' : 16, 'blocks : 48'and full fill all restrictions 16 * 48 * 2 = 1536 and 48 mod 24 = 0.

The memory limit for NVIDIA Pascal GPUs is 16 GiB if the newest CUDA driver is used.

AMD Backend

By default the AMD backend can be tuned in the config file amd.txt

Choose `intensity` and `worksize`

Intensity means the number of threads used to mine. The maximum intensity is GPU_MEMORY_MB / 2 - 128, however for cards with 4GB and more, the optimum is likely to be lower than that.worksize is the number of threads working together to increase the miner performance.In the most cases a worksize of 16 or 8 is optimal.

Two Threads per GPU

Some AMD GPUs can mine faster on some mining algorithms if two threads are using the same GPU.If you have amd.txt config with one index entry per GPU - duplicate these entries to run 2 threads per GPU.Notice: Keep in mind that the memory usage on the GPU will also double - therefore adjust your intensity by hand.

Example of 2-threaded config:

Interleave Tuning

Note 1: Interleaving is available for AMD GPUs only.

Note 2 Interleaving has effect only when 2+ threads are used per each GPU.

Interleave controls when a worker thread is starting to calculate hashes if two worker threads are used to utilize one GPU. This parameter is designed to reduce total idle periods of GPU while mining

1.Reading and understanding the log:

Reads as:OpenCL Interleave GPU ID|Thread ID: last delay/average calculation time per hash bunch - interleave value

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2.Do I need to adjust it?
In general, interleaving can be used as representation how 2-threading works with your GPU at current set of settings (including GPU power profile, miner settings, drivers). And default value 'interleave' : 40 in amd.txt works good in most cases.

2.1 Optimal setup: After you started mining you have last delay value reduced over time to minimum possible value and stays at it. The best scenario is when last delay value settled around 10-15 and interleave messages appear rarely. The reported hashrate will be close to max. of GPU capabilities.

2.2 Not optimal setup: After you started mining you have last delay value reducing over time and jumping back to high values, or rising after the start of mining. The reported hashrate will be lower compared to max. possible.

3.Adjusting Interleaving and optimizing hashrate
Note: setting interleave value in amd.txt higher than 50 has no practical sense

If you faced situation described in 2.2 then you need to keep in mind that this can be caused by several possible reasons, so treat them accordingly and start miner after each attempt and check logs and hashrate:

Miner misconfiguration 1: Adjust 'interleave' in amd.txt by couple points +/-
Miner misconfiguration 2: Adjust 'intensity' in amd.txt by setting lower value (multiple to 'worksize' value)
GPU overclock: Reduce overclock/overvoltage values of GPU memory and GPU core
Drivers issue: Try reinstalling your drivers (there are 3 possible options to try: blockchain drivers, v18.6.1, or newest version)

disable comp_mode

comp_mode means compatibility mode and removes some checks in compute kernel those takes care that the miner can be used on a wide range of AMD/OpenCL GPU devices.To avoid miner crashes the intensity should be a multiple of worksize if comp_mode is false.

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Auto tune

Note: This feature is available for AMD gpus only.

Auto-tuning feature may help you to speed up seek process of finding optimal intensity for your GPU (vs manual check, in case if you want to compare autogenerated intensity with the most performing value).

When set, miner will perform several (defined by user) rounds per each intensity check of given range. When setting number of rounds - keep in mind that you want to have a balance of speed and reliability of the checking.

After setting number of checks per intensity value, you will need to set ceiling value after which the miner will stop checking intensity values.

1.Enabling and configuring auto-tune
Navigate to amd.txt config file in miner's folder, find (in the bottom part) parameter 'auto_tune' : 0, and set it to 'auto_tune' : 6, (6-10 rounds per intensity value suits most cases.)Set autogenerated value of 'intensity' : X, for each thread in amd.txt to slightly higher level (e.g. from 890 to 1000)Start xmr-stak.exe

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After the checking, you will see

OpenCL 0|0: lock intensity at 896
OpenCL 0|1: lock intensity at 896
Write down these locked intensity values and stop miner.

3. Finalizing setup
Set 'auto_tune' value (step 1.1) in amd.txt back to 'auto_tune' : 0,
Enter locked intensity values from step 2.
Start miner.

Change the scratchpad memory pattern

By changing strided_index to 2 the number of contiguous elements (a 16 byte) for one miner thread can be fine tuned with the option mem_chunk.

Increase Memory Pool

By setting the following environment variables before the miner is started OpenCl allows the miner to more threads.This variables must be set each time before the miner is started else it could be that the miner can not allocate enough memory and is crashing.

Note: Windows user must use set instead of export to define an environment variable.

Scratchpad Indexing

The layout of the hash scratchpad memory can be changed for each GPU with the option strided_index in amd.txt.Try to change the value from the default true to false.

CPU Backend

By default the CPU backend can be tuned in the config file cpu.txt

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Choose Value for `low_power_mode`

The optimal value for low_power_mode depends on the cache size of your CPU, and the number of threads.

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The low_power_mode can be set to a number between 1 to 5. When set to a value N greater than 1, this mode increases the single thread performance by N times, but also requires at least 2*N MB of cache per thread. It can also be set to false or true. The value false is equivalent to 1, and true is equivalent to 2.

This setting is particularly useful for CPUs with very large cache. For example the Intel Crystal Well Processors are equipped with 128MB L4 cache, enough to run 8 threads at an optimal low_power_mode value of 5.

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