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How to Safely overclock CPU/GPU on a PC – Guide
By safely overclocking your CPU and GPU, you can get extra performance out of your PC without spending money. Most processors have some extra space, and if you know how to overclock your CPU, you can make the most of it for higher gaming rates, faster results in Adobe Pro, and everything in between.
Despite the fact that overclocking can seem daunting, it’s actually not too tedious and not a very remarkable gamble as long as you know what you’re doing. Keep in mind, however, that overclocking the CPU is only about 50% of the battle to improve your PC’s presentation; you can also overclock the memory. If you don’t know which processor to buy, check out our guide in how to best overclock your PC’s GPU and CPU.
How to Safely overclock the CPU/GPU on a PC
overclocked cpu
The advertised speed of your CPU is calculated by multiplying the base clock rate by a multiplier. To get more performance out of your processor, you need to increase one of these two variables. If you don’t have an unlocked processor (Intel’s K-series and Extreme Edition or AMD’s Black Edition), you have less flexibility because unlocked processors give you more multipliers to adjust. But you can still get a little more performance out of your CPU.
We tried to overclock a test machine with one of Intel’s K-series unlocked chips, a Core i7-2600K with a base speed of 3.4 GHz (this number is the product of the processor’s base frequency, 99.8 MHz, and the multiplier, 34). With K-series chips, you can easily change the multiplier via the “Performance” settings in your BIOS. Just launch the BIOS, increase the CPU multiplier by one, save and boot Windows.
If this boot process does not result in error messages or a violent restart of your computer, you are on the right track. Check your system specs via CPU-Z to ensure your settings are preserved, they could be lost if something goes wrong during the optimization process. On the CPU tab of CPU-Z, look at the number under Core Speed and Multiplier. This number will vary depending on what your PC is doing.
Then run a benchmark utility to test your new CPU configuration. Use Prime95 or Linx’s torture test mode to push your PC to the limit to get an idea of your system’s maximum clock speed. If after a few hours of crunching numbers with one of these tools, your computer no longer displays blue screens or sudden restarts, you’re probably on the safe side. Then you can keep your current overclock settings or try again with a slightly higher speed.
overclocking GPU
Overclocking a modern graphics card is easier than ever. In most cases, you can increase performance by turning up some sliders in your GPU configuration program. First, make sure you’ve downloaded the latest drivers from the manufacturer’s website. AMD Provides Basic Overclocking features the ATI Overdrive tab of the included Catalyst Control Center software; for an Nvidia card, you will need to download the Nvidia System Tools utility to change the GPU clock speed settings.
Open your card’s utility and locate the clock speed controls for your GPU’s processor and memory. In AMD’s Catalyst Control Center, you’ll find them under the Overdrive tab; for Nvidia, the clock speed sliders are in the Performance menu. Increase the sliders in small increments of about 5 to 10 MHz at a time. Test the new settings by running free benchmarking software like Heaven 2.0 or playing a graphics-intensive game for 15-20 minutes to see if there are any graphical glitches, which are a warning sign that your GPU is starting to fail.
If you see solid blocks of flashing color or strange flashing pixel formations, you’ve put too much pressure on your GPU; in this case, restart and downgrade some levels. Most modern PC components are robust enough to handle this type of interference. If you revert to a stable overclock setting at the first sign of trouble, your components should be relatively safe.
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