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Buying guide

How to buy a processor

Updated April 30, 2026 · 2 min read

Modern CPU selection is a question of platform choice and use case. Gaming-first builds want X3D V-Cache. Productivity-first wants core count. Mixed-use builds split the difference.

01

Use case

Glossary →

Gaming benefits most from L3 cache; productivity scales with core count and threads.

What to aim for

Gaming-first → Ryzen X3D. Productivity-first → Ryzen non-X3D or Intel Core Ultra. Mixed → Ryzen 9 9900X3D.

02

Platform longevity

AMD's AM5 is supported through 2027+. Intel LGA1851 is a new socket with limited lifespan promise.

What to aim for

AM5 if you plan to upgrade mid-cycle. LGA1851 if you want the latest Arrow Lake / future Intel.

03

Cooler requirement

Modern X3D + Arrow Lake CPUs need 240mm+ liquid or premium air. Stock coolers (when included) are insufficient.

What to aim for

240mm AIO or NH-D15 G2-class air for sustained workloads.

04

RAM speed sweet spot

Different CPUs have different "sweet spot" RAM speeds where performance plateaus. Beyond it, gains are marginal.

What to aim for

AM5: DDR5-6000 CL30. LGA1851: DDR5-7200 CL34.

05

Power + thermals

TDP is a sustained load number; PL2/PPT can boost 2-3× for short windows.

What to aim for

Verify your motherboard VRM can handle the boost power, not just the base TDP.

Pitfalls to avoid

  • CPU overclocking yields almost nothing on modern silicon — boost algorithms are aggressive enough.
  • "Stock cooler" included with non-X3D Ryzen is fine for stock TDP but insufficient for any sustained load.
  • X670E vs X870E vs B850 boards differ on USB4 + PCIe 5.0 slots, not actual performance.

Our sweet-spot pick

Ryzen 9 9800X3D for gaming-first ($479). Ryzen 9 9900X3D for mixed-use ($599). Avoid Core Ultra 9 285K unless you need its specific NPU.

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