Video cards increase the frequency of the graphics core and memory and, as a result, increase the performance of the computer's video subsystem. The surest thing is to speed up the graphics card with special tools - like RivaTuner, PowerStrip, etc. Frequency changes happen on the fly in the video driver, so if something goes wrong - it's always easy to rewind one step. Frequencies can also be increased directly in the BIOS of the graphics card itself (by flashing new frequencies), but it may happen that flashing frequencies where the graphics card cannot work - then restoring it is much more difficult. performance, so the first overclocking method is relatively safer.
About memory speed
Memory speed is measured in nanoseconds. You can determine this by the last two numbers on the marking line of one of the memory chips. For example, xxxxx xxx -33 means that 33 is 3.3 nanoseconds (abbreviated ns). Translating ns to megahertz is quite simple: there is a formula of 1000/ns; if you have DDR memory, you also need to multiply the resulting value by 2. For example, my graphics card has 2.8 ns DDR memory, which means you need 1000/2.8 = 357 x 2 = 714 MHz.
The principle of overclocking is quite simple: we increase the core / memory frequencies and test the graphics card for stability. So you have already installed RivaTuner. If not, download the latest version of this program. Start RivaTuner and the main window of the program will appear in front of us, where you can see the model of your video card, the installed video driver, etc. Now there are two ways to do this: overclocking the video card using the video driver or "directly" without affecting the video driver.
The last option does not work on almost all new models of graphics cards, so we will consider option number 1. Click on the Customize button, an additional menu will appear, where we only need the first tab System settings, go to it and our eyes will begin to open the control center for the graphics core and memory frequencies of your graphics card, then check the box next to Enable hardware acceleration at the driver level, after which a window will appear with a warning about recommending a system restart, probably for a while. more accurate determination of graphics card frequencies.
Feel free to click the Discover Now button and go straight to the actual overclocking process. You will see a couple of sliders in front of you: the core clock is responsible for the core frequency, the memory clock is responsible for the memory frequency (if your graphics card has separate frequencies for 2D and 3D modes, you should switch to control 3D frequencies and their overclocking). Let's start by increasing the frequency of the memory: add 20 MHz, press the button Test, Apply, and then test the graphics card, for example, in 3DMark 2001/2003, then increase the frequency again, test again - and so on until we find the ceiling. to speed up memory (more on testing, below). The method for overclocking the graphics core is the same.
We assume that you have found the upper limit of core and memory frequencies, tested the graphics card for stability and proper operation. So that all our work does not go to waste after restarting Windows, the new frequencies must be kept on the graphics card. To do this, check the Use acceleration at Windows startup, all in the same frequency control box and click Save.
Signs of overclocking
The main signs of overclocking (overheating) of the memory of the graphics card are artifacts that appear on the screen during the operation of 3D applications (with strong acceleration, they can appear even in 2D mode): "knocked out" areas of the image, lack of textures, stripes and other anomalies that are not visible at standard frequencies perform. Image hanging is a sign of graphics card core overclocking (overheating). If you experience overclocking, here's what you should do.
Reduce the frequency of the overclocked component to a frequency where the graphics card can work stably.
If you have not improved the standard cooling system in any way, you need to upgrade it: install radiators for memory, add an additional fan. This will result in a drop in core and memory temperature and possibly an increase in the overclocking threshold.
Do a voltmod to the core and/or memory if it's worth it of course. The. Disadvantages: high probability of loss of warranty, implementation difficulties, higher temperature of the core and memory. Advantages: a significant increase in the threshold of permissible frequencies.
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