Athlon X4 840 vs Pentium E5400
The Athlon X4 840 is slightly slower than the Pentium E5400 on average across 100+ games. We cannot compare value as at least one CPU is out of stock.
FPS Comparison Across Popular Games
Predicted average FPS at 1080p, 1440p, and 4K, based on real game benchmarks.
Specs & Benchmark Comparison
Side-by-side specs, synthetic benchmarks, and key hardware differences.
Base Frequencyhelp
Athlon X4 840 has a 15% higher base clock.
FM2+
Sockethelp
LGA775Kaveri
Codenamehelp
WolfdaleDesktop
Segmenthelp
DesktopNo Integrated Graphics
Integrated GPUhelp
No Integrated Graphics2133 MHz (DDR3)
RAMhelp
DDR1, DDR2, DDR3Overclockable
Overclock Supporthelp
Not OverclockableFrequently Asked Questions
compare_arrowsWhich is better, Athlon X4 840 or Pentium E5400?expand_more
The Pentium E5400. It's 4% faster than the Athlon X4 840 on average across 100+ games, scoring 48/100 vs 46/100 in our gaming rating.
speedHow much faster is Pentium E5400 than Athlon X4 840?expand_more
4% faster on average. The gap varies by game and resolution, check the per-game FPS comparison above.
aspect_ratioWhich is better for 1440p and 4K gaming, Athlon X4 840 or Pentium E5400?expand_more
The Pentium E5400 is faster at both resolutions. Toggle the resolution selector above to see per-game FPS.
paidIs the Pentium E5400 worth buying in 2026?expand_more
It scores 48/100 in our gaming rating, faster than most CPUs on the market. Good buy if the price is right.
differenceWhat is the difference between Athlon X4 840 and Pentium E5400?expand_more
Performance: Athlon X4 840 scores 46/100, Pentium E5400 scores 48/100. They also differ in core count, clock speeds, L3 cache, and power draw. Full breakdown in the specs section above.
compressWill the Athlon X4 840 or Pentium E5400 bottleneck my PC?expand_more
Depends on the rest of your build, especially your GPU. Swap the paired GPU in the FPS section above to see if it limits performance, or use our bottleneck calculator for a full analysis.
upgradeIs it worth upgrading to the Athlon X4 840 or Pentium E5400?expand_more
The Pentium E5400 is the stronger pick at 48/100. Compare your current CPU against it to see the exact FPS gain across 100+ games.
Popular Comparisons
Athlon X4 840 vs Ryzen 7 7800X3DAthlon X4 840 vs Ryzen 5 7600XAthlon X4 840 vs Ryzen 9 9950X3DAthlon X4 840 vs Ryzen 7 7700XAthlon X4 840 vs Ryzen 9 9900XAthlon X4 840 vs Ryzen 7 9850X3DAthlon X4 840 vs Ryzen 7 9700XAthlon X4 840 vs Ryzen 5 8500GAthlon X4 840 vs Ultra 7 265KFAthlon X4 840 vs Ryzen 9 9900X3DAthlon X4 840 vs Ryzen 5 7500X3DAthlon X4 840 vs Atom D510Athlon II X2 240 vs Athlon X4 840Athlon X4 840 vs Ryzen 7 9800X3DAthlon X4 840 vs Ultra 5 245KAthlon X4 840 vs Ultra 5 245KFPentium E5400 vs Ryzen 7 7800X3DPentium E5400 vs Ryzen 5 7600XPentium E5400 vs Ryzen 9 9950X3DPentium E5400 vs Ryzen 7 7700XPentium E5400 vs Ryzen 9 9900XPentium E5400 vs Ryzen 7 9850X3DPentium E5400 vs Ryzen 7 9700XPentium E5400 vs Ryzen 5 8500GUltra 7 265KF vs Pentium E5400Pentium E5400 vs Ryzen 9 9900X3DPentium E5400 vs Ryzen 5 7500X3DAtom D510 vs Pentium E5400Athlon II X2 240 vs Pentium E5400Pentium E5400 vs Ryzen 7 9800X3DUltra 5 245K vs Pentium E5400Ultra 5 245KF vs Pentium E5400