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Core i5-12400F vs Core i5-10400F: Gaming Performance & Bottleneck (2026)

The Core i5-12400F is in a different league: 36% faster than the Core i5-10400F at 1080p with an RTX 5090, or 120 vs 88 FPS in AAA games at High settings. The gap holds at 1440p (36%) because even there the CPU, not the RTX 5090, sets the frame rate. In esports games like CS2 it's 312 vs 229 FPS, and in CPU-heavy titles such as Microsoft Flight Simulator 66 vs 48 FPS at 1440p. 1% lows, which decide how smooth a game feels, come in at 84 vs 62 FPS. With a more typical RTX 5070 at 1440p they land at 98 and 85 FPS, 16% apart. The Core i5-12400F sits on LGA1700 and the Core i5-10400F on LGA1200, so switching means a new motherboard. Both have 6 cores and 12 threads. Under a 10% CPU bottleneck at 1440p, the Core i5-12400F can drive up to the RX 7900 XTX and the Core i5-10400F up to the RTX 4070 Super.

Relative performance

Faster CPU = 100%. Average FPS at High settings with an RTX 5090.

AAA games, 1080p

Core i5-12400F100%
Core i5-10400F73%

120 vs 88 FPS · Core i5-12400F +36%

Esports, 1080p

Core i5-12400F100%
Core i5-10400F73%

312 vs 229 FPS · Core i5-12400F +36%

CPU-heavy games, 1440p

Core i5-12400F100%
Core i5-10400F73%

66 vs 48 FPS · Core i5-12400F +36%

FPS with an RTX 5090

Average FPS, no upscaling. The fastest GPU, so the processor sets the pace.

SettingCore i5-12400FCore i5-10400FLead
1080p High, AAA12088i5-12400F +36%
1440p High, AAA12088i5-12400F +36%
1080p esports312229i5-12400F +36%
1440p CPU-heavy6648i5-12400F +36%

Specifications

Gaming index: Ryzen 7 9800X3D = 100.

SpecCore i5-12400FCore i5-10400F
Cores / threads6 / 126 / 12
SocketLGA1700LGA1200
Released20222020
3D V-CacheNoNo
Gaming index6044

Which GPUs can it drive?

Strongest common GPU each CPU keeps under a 10% CPU bottleneck at 1440p High.

ProcessorStrongest GPUFPS
Core i5-12400FRX 7900 XTX114
Core i5-10400FRTX 4070 Super84

Which should you buy?

Buy the Core i5-12400F if you want the faster gaming CPU: it's 36% ahead at 1080p with a high-end card. The Core i5-10400F makes sense if it costs at least 36% less, or if you pair it with a mid-range GPU that hides the difference. Already own the Core i5-10400F? Going to the Core i5-12400F gains 36% at 1080p, which is a worthwhile upgrade. It also needs a new LGA1700 motherboard.

Buy the Core i5-12400F if…

  • you play at high refresh rates: 36% more FPS at 1080p with a fast GPU.
  • you care about smoothness: 1% lows of 84 vs 62 FPS at 1080p.
  • you play strategy, sims or MMOs: 66 vs 48 FPS in CPU-heavy games.
  • you plan a faster graphics card: it keeps up with GPUs up to the RX 7900 XTX at 1440p.
  • you already own an LGA1700 motherboard: it's a drop-in upgrade with no new board or RAM.

Buy the Core i5-10400F if…

  • it costs at least 36% less, or you game at 1440p and above where the gap shrinks.
  • it's the cheaper of the two where you shop: gaming performance is close enough that price decides.

Check your build

These numbers use an RTX 5090 to isolate the processor. Your own graphics card, resolution and settings change the result, so run your exact parts through the calculator.

Check Core i5-12400F + RX 7900 XTX Check Core i5-10400F + RTX 4070 Super

Popular builds with these CPUs

Core i5-12400F + RTX 5070 Ti1440p · Balanced · ≈112 FPSCore i5-12400F + RTX 50701440p · GPU-limited 16% · ≈98 FPSCore i5-12400F + RX 9070 XT1440p · Balanced · ≈111 FPSCore i5-10400F + RTX 5060 Ti 16GB1440p · GPU-limited 12% · ≈74 FPSCore i5-10400F + RX 9060 XT 16GB1440p · GPU-limited 20% · ≈69 FPSCore i5-10400F + RTX 40601440p · GPU-limited 44% · ≈49 FPS

Core i5-12400F vs Core i5-10400F: quick answers

Is the Core i5-12400F better than the Core i5-10400F for gaming?

Yes. The Core i5-12400F is about 36% faster at 1080p with an RTX 5090 and 36% faster at 1440p. The gap is smaller with a mid-range graphics card, which becomes the limit first.

How many FPS do the Core i5-12400F and Core i5-10400F get?

Paired with an RTX 5090 at High settings, the Core i5-12400F averages about 120 FPS at 1080p and 120 at 1440p in AAA games, and 312 FPS in esports titles. The Core i5-10400F averages 88, 88 and 229 FPS.

Which graphics card should I pair with the Core i5-12400F or Core i5-10400F?

For a CPU bottleneck under 10% at 1440p, the Core i5-12400F keeps up with cards up to the RX 7900 XTX and the Core i5-10400F keeps up with cards up to the RTX 4070 Super. Any slower card is a safe match. At 4K both CPUs can drive faster GPUs, and at 1080p they need slower ones.