You can use the Home page of Ryzen Master to monitor the temperature of your CPU during testing, or you may wish to use HWMonitor which will log the highest temperature of each core during testing. This will test all cores to 100% for 10 minutes, which should be enough to ensure that the system won’t crash and that temperatures won’t get too high. My stability test of choice is to use Cinebench R20 on a timed test (File->Preferences->set minimum time to 600 seconds). We do this in small incriments, testing after each attempt to ensure stability. Now that we’ve managed the voltage and memory clock speeds the next step is to change the clock speed of the cores on the CPU. Set the slider for “Memory Clock” and “Fabric Clock” to HALF of the speed of your RAM (So if you have DDR4-3200, set the speed to 1600). Next go down to “Memory Control” and click the “Excluded” button so that it changes to “Included” and the options below it become accessible: But, the tradeoff is that we may introduce instability to the system if we reduce the voltage to a point where signals are no longer transmitted properly: By supplying the processor with less voltage we’re reducing the amount of heat generated in use. ![]() Next scroll down to “CPU Voltage” and change the value from the default to 1.3V. Select “Manual” from the toolbar (top right). Click on the “Profile 1” tab and you’ll see the following: On the left hand pane you’ll see that we’re currently on the Home tab. and a bunch of info further down about clock speeds and the like. ![]() Along the top you can see a bunch of indicators showing you temperature, power use, etc. Take a moment to familiarise yourself with the layout. ![]() The first step is to install and then open Ryzen Master, you should see a window like this: The problem is the heat generated by the CPU when all cores are boosting, so we need to find a way to reduce the temperatures, allowing the CPU to boost higher without cooking itself. The 3900X comes with 12 physical cores and 24 logical threads, which is great for productivity loads where thread count is important.īut, as described above, if you try and boost all cores at the same time your boost speed will settle significantly lower than advertised. I’m going to split this guide into two parts, in the first I’ll describe how to get the best performance for multi-threaded workloads and in the second how to get the best gaming performance.
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