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Msi afterburner force constant voltage9/20/2023 ![]() As you can probably guess, the more demanding the game (i.e., if it uses ray tracing or other advanced features), the more likely it is to require additional fine tuning and lower clocks.įor this tutorial, we'll use Cyberpunk 2077, running in a window at 2560x1440 with RT-Ultra settings and DLSS Quality mode, to find a reasonable overclock for a GeForce RTX 3090 Founders Edition card. When that happens, you'll have to go back to tune the settings and see if you can find some that allow the game to run properly. Note that "stable" is in quotation marks because even if the initial testing seems to work fine, there will often be exceptions where some games or applications crash while others work. (In some cases, you can also adjust memory voltage.) I start by finding the maximum "stable" core clock, then I find the maximum "stable" memory clock, and then I try to find a blend of the two that results in optimal performance. There are four primary points of interest when overclocking a graphics card: GPU core clock, memory clock, GPU voltage, and fan speed. Note that you'll want a game or test that doesn't stop rendering when you leave focus (so if it shows the menu when you Alt+Tab, that's not going to work). From there, I switch over to Afterburner and start trying some adjustments. My approach is to fire up a graphically intense game or benchmark that will run in a window, then I run the game at 1920x1080 or 2560x1440 (depending on the GPU I'm using) and get to a spot where nothing is going to kill me. The OC scanner can take 20 minutes to run, and most of the time, you can get a quick and easy overclock much faster on your own. It doesn't do anything for memory clocks either, so you'll likely end up going the manual route. We've had it crash, we've had it generate unstable overclocks, and sometimes it doesn't even match a quick and dirty +150 MHz (or whatever) manual overclock. This is supposed to make overclocking easier, but as with most auto-tuning utilities, your mileage may vary. Press Ctrl+F, then click the OC Scanner button in the top-right corner and let it do its thing. One option for overclocking is to use the automatic OC scanner tool. If you want to play with that option, go into the settings and check the box for "Unlock voltage control." You can try setting it to reference design, standard MSI, extended MSI, or third party - some cards will only allow voltage adjustments with the correct mode, and some might not allow it at all. By default, Afterburner locks out voltage adjustments. It shows sliders for core voltage, power limit, core clock, memory clock, and fan speed. Here's the main interface for MSI Afterburner, using the v3 skin. Case in point: Even though all the RTX 4090 cards we've seen so far appear to use Micron 21Gbps GDDR6X memory ("D8BZC" labeled chips), we've seen maximum stable memory overclocks range from 22.6Gbps to as high as 25Gbps. Please note that overclocking very much depends on the "silicon lottery." Just because one person with a "HappyGPUs RTX 4090 X-Factor-Wow" model card (that's a made up name, if you couldn't tell) managed a 20% core overclock and a 25% memory overclock doesn't mean that every RTX 4090 card will hit those same clocks, or even that the same model will reach similar clocks. It's also possible to overclock AMD and Nvidia GPUs using the built-in utility in AMD's drivers or Nvidia's GeForce Experience, which we'll cover below, but we'll start with the universal approach to overclocking your GPU. The same basic process can be used with other utilities, including EVGA Precision X1, Asus GPU Tweak, and other graphics card vendor utilities. There are a variety of utilities, but we're going to focus on MSI Afterburner, which is one of the most popular and commonly used GPU overclocking tools. Once you have your baseline stock performance data, it's time to start overclocking. ![]() Check our guide on how to test graphics card performance, and you'll also want to check your graphics card temperatures and clock speeds. You want to be able to see how much faster your PC runs after tuning, after all - if performance doesn't improve, you'll want to know. But if you have one of the best graphics cards and you're looking to eke out a bit more performance, we'll discuss how we go about overclocking and determining "safe" settings.īefore overclocking, it's useful to get a baseline measurement of how your graphics card performs. Of course, as with any overclocking, care should be taken to avoid running your GPU at unsafe settings. Overclocking your graphics card can improve its performance by 5% to as much as 15% (or more), depending on the particular card model.
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