Posts Tagged ‘modify GPU memory timings

Modifying the BIOS of an AMD video card with different operating frequencies or better memory timings and then flashing it on the GPU has been the primary choice of crypto miners for a while. Due to the introduction of the BIOS signature check in the video driver by AMD some time ago this also required users to patch the video drivers in order to continue using them with more recent video drivers. Earlier this year the AMD Memory Tweak Tool has been released and meanwhile it has evolved into a quite the useful alternative to BIOS modding. The latest AMD Memory Tweak XL makes it really easy to modify memory timings, memory straps or PowerPlay Table “on the fly” as well as access the ADL Overdrive and MMIO Register Control on newer GDDR5/HBM-memory based AMD video cards. This means that you can change the settings and apply them directly and test how they will affect performance and stability, changes are not permanent and as soon as there is some issue you can easily revert back to the default values.

The AMD Memory Tweak XL tool requires that you have .NET Framework 3.5 installed in order to function, if it is not available on your system it will automatically detect and offer to download it for you… though you might experience various issues when trying to install the framework on some mining rigs. Also your Windows needs to be in Test Mode in order for the tool to properly function, it will offer to get you into Test Mode if you are currently not and there is a button to easily get you back to regular operation. The AMD Memory Tweak XL is originally intended for more advanced users, though you should be able to quickly get up to speed on what and how to modify to get better performance. You can look at what other users have reported as settings that give better performance on their specific mining GPUs and try them and experiment on what your AMD GPUs are capable of. Even if you already have an modified video BIOS you can still play with the memory straps for example in order to squeeze some extra performance to test even better settings before applying them with a new BIOS modification.

For more information and to download the AMD Memory Tweak XL tool…

The very useful AMD Memory Tweak Tool that was initially only available for Linux is now also available as a beta for Windows users as well. With the help of the free and open source software from Evilop you can read and modify memory timings “on the fly” for compatible AMD GPUs that do come with GDDR5 or HBM2 memory (HBM was also supported initially, but is temporary disabled as it apparently need some fixing). Before starting to do anything with the tool you should check the Readme and run AMD Memory Tweak with the option --current in order to see what GPUs it detects and what memory settings are currently active. It might also help to see what other users have found out as good working configurations for their hardware and have reported on Bitcointalk based on their experiments with the memory tool.

To check out the AMD Memory Tweak tool for real time memory modifications on AMD GPUs…

There is a new interesting tool released by Eliovp for modifying the video memory timings of AMD GPUs on the fly, so no need to modify and reflash the GPU BIOS anymore to do so. The not so good news for some users is that the tool is currently available for Linux only, but still you can test under Linux and make permanent changes via BIOS if needed after that for mining under Windows. The AMD Memory Tweak tool supports GDDR5 an HBM/HBM2 memory AMD GPUs and should be able to help increase hashrate in memory intensive algorithms such as Ethash for example. The AMD Memory Tweak tool is similar to the ETHlargementPill for Nvidia GDDR5X-based GPUs as an idea and functionality. The software is available as open source and is completely free to use, however you are welcome to send the author a tip if you find it useful.

To check out the AMD Memory Tweak tool for real time memory modifications on AMD GPUs…


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