![]() ![]() You can access the BIOS settings during your PC's boot sequence, usually by pressing F2 or Del.ĭon't be scared: If something goes wrong with your BIOS settings and your PC won't boot, you can physically reset the motherboard. The BIOS handles booting your PC, and that's where we're adjusting the clock multiplier (as well as other settings for more advanced overclocking). Despite this, we prefer a more direct approach. You can overclock using Intel's Extreme Tuning Utility (opens in new tab) or AMD's Ryzen Master (opens in new tab), and both of those tools have come on a lot recently. Every CPU is different, so there's no one-speed-fits-all number to pick. At that point, ease back a notch or two until your system is stable again, and you’ve found the basic maximum overclock for your CPU. Do this until the system becomes unstable, or until temperatures get too high. The basic technique is to bump the multiplier up a little at a time (often by increments of 1x), then run stress test benchmarks (like the one found in AIDA64) each time. Since the multiplier adjustment isolates the overclock to just the processor, it can deliver more speed than base clock boosts and does so with a minimum of troubleshooting. The full potential of an unlocked CPU is discovered by gradually increasing the ratio from the default to between 40x-50x, resulting in an overclocked speed of 4 to 5 GHz. This number is used by the processor alone, so it doesn’t affect other parts of the system dependent on a stock or near-stock base clock to operate. For instance, a 100Mhz base clock with a 43x multiplier means you're running at 4,300MHz or 4.3GHz. The multiplier or ratio is a number, usually around 30x-50x on a modern processor, applied to the base clock to determine the maximum processor speed. Start by bumping the CPU multiplier or ratio first. Many motherboard components and add-in cards that depend on the base clock aren’t particularly tolerant of adjustment, becoming unstable after minor increases, and long before unlocked processors reach their full potential. Intel has also locked down BCLK support in its modern CPUs, so in most cases, anything beyond a few MHz won't work. While a system’s base clock can be adjusted upward for better performance, this isn’t the place to start when overclocking a PC. These determine your system’s clockspeed. Look for the base clock and ratio multiplier values in your BIOS. Don’t let this fool you, however, as that number is just part of a formula that provides different rates to a wide variety of subsystems such as storage, PCIe slots, and memory, which have unique speed requirements. The core speed value, or base clock, of any architecture is almost always set at a paltry 100 MHz. While system clockspeeds are presented by a single number, they are the result of several interlocking systems that run at different rates and are derived via the simple multiplication of a few key system settings. Refer to our PC building guide for more on installing CPU coolers. ![]() If you're having heat problems even before overclocking, consider removing your cooler, scraping off the old paste, and reapplying it. (Image credit: Cooler Master)Ī quality CPU cooler: As mentioned, you want to keep CPU temperatures below 85☌, so use a quality air cooler or a liquid cooling solution, and make sure your thermal paste is applied properly. That said, overclocking obviously presents more risk than not doing anything, so use care.Ī quality CPU cooler can make a massive difference to your overclocking adventures. It's easy to monitor your CPU temps, and if you're methodical about the process and run the necessary tests, you and your processor will be just fine. ![]() It can also potentially cause damage if left unchecked. To do that, you'll need a decent cooling solution: either a quality air cooler for basic overclocking or a liquid cooler for the best results.Īllowing your CPU to run too hot will cause it to throttle the clockspeed to cool down, ruining the very point of overclocking. In general, you want to keep your overclocked CPU below 85☌ at all times, and cooler if possible. Increasing your CPU's clockspeed and voltage increases the amount of heat it generates. And if you need it, here's our guide to the best CPUs for gaming. For instructions on that, head to our GPU overclocking guide. While this introduction focuses on CPU overclocking, you can also overclock some graphics cards. A faster CPU clockspeed can translate to faster framerates in games where the CPU, and not your graphics card, is the bottleneck. It’s the second factor, clockspeed-the rate at which the CPU executes instructions, measured in MHz and GHz-that’s of interest to overclocking enthusiasts as you can often adjust it beyond the out-of-box speeds.
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