How to choose a CPU (2026)
By the Let’s Compare Editorial Team · 2 min read · 5 things that matter · Updated September 2026
Short answer: Buy for your workload and the rest of the build. Gamers get more from strong single-core speed and a good GPU than from a high core count, while creators and anyone compiling code benefit from more cores and threads. Check the socket and cooling before you buy, and skip overclockable, high-wattage chips you won't push.
Pick the CPU and much of the build follows, since the motherboard, the cooler and the power supply all depend on it. We track hundreds of processors, so the medians below give a solid read on the market. Each section explains one spec and how much it counts toward our 0–100 score.
What matters most, and how much
| Factor | Weight in our score |
|---|---|
| Cores, threads & clocks | 38% |
| Benchmarks | 38% |
| Integrated graphics & cache | 9% |
How much each factor moves our 0–100 cpus score.
Torn between the top two? See our head-to-head: AMD Ryzen 9 7945HX vs AMD Ryzen 9 7950X3D →
Cores, threads & clocks: match them to the job
Cores and threads determine how well a chip handles parallel work, and clock speed determines how fast each core runs. The CPUs we track sit at a median of 8 cores and 16 threads. Games and everyday apps lean on a few fast cores, so single-core speed counts most there. Video editing, 3D rendering and compiling scale with more cores. Buy for what you actually run. Cores you never load just cost money and add heat.
Weight in our score: 38%See the best for this →
Benchmarks: the fairest way to compare brands
Clock speeds and core counts don't compare cleanly across generations or brands, because architecture (IPC, the work done per clock) differs. A benchmark score captures delivered performance, which makes it the fairest single number. Look at multi-core scores for heavy creative and productivity work, and at single-core (or gaming-specific) results for games and a snappy everyday feel. Compare like-for-like benchmarks instead of trusting GHz alone.
Weight in our score: 38%See the best for this →
Power & cooling: the spec that picks your cooler
Power draw (TDP and actual peak wattage) determines heat, and heat determines the cooler you need. The chips we track have a median max power of 80W, but high-end parts can pull far more, and under a weak cooler they'll throttle and throw away performance you paid for. Budget for proper cooling with any powerful CPU. If you want a quiet, cool, efficient system, look at performance-per-watt as well as peak speed.
Socket & platform: what the chip plugs into
The socket dictates which motherboards a CPU fits, and the chipset decides things like PCIe and memory support and whether you can overclock. 15% of the processors we track are unlocked for overclocking, which is useful to enthusiasts and irrelevant to most buyers. Check whether the platform has an upgrade path (can you drop in a future chip?), and count motherboard and memory costs in the total price.
Integrated graphics & cache: tie-breakers
Two smaller specs matter in specific cases. Integrated graphics let a system drive a display, and even game lightly, without a separate GPU. That's essential for office and budget builds and irrelevant if you're adding a graphics card. Cache (our median L3 is 18MB) is fast memory sitting close to the cores, and a large one noticeably helps gaming and some other workloads. Neither should lead your decision, though either can break a tie between similar chips.
Weight in our score: 9%
Frequently asked questions
How many CPU cores do I need?
It depends on what you run. Games and everyday apps lean on a few fast cores, so single-core speed counts most there, while video editing, rendering and compiling scale with more cores.
Does a higher GHz mean a faster CPU?
Not across brands or generations. Architecture (work done per clock) differs, so compare benchmark scores instead of raw gigahertz.
Does CPU cache matter for gaming?
Yes. A large cache, like AMD's 3D V-Cache, noticeably boosts gaming, sometimes more than a higher clock speed would.
Explainers for this guide
- Why a slower-clocked CPU can win at games
AMD's 3D V-Cache shows why cache and efficiency often beat raw gigahertz for gaming.
- CPU cores vs clock speed: which matters more?
More cores or more gigahertz? It depends on what you run.
Sources & further reading
Every figure above is computed from our own catalogue. The general technical claims are backed by the independent references below (some from non-English outlets), so you can check them yourself.
Ready to compare?
The figures in this guide are computed live from the 425 cpusin our catalogue and update as it grows. Analysis by the Let’s Compare Data Engine.