Core 2 Duo E4400 vs Core i5-6600
The Core 2 Duo E4400 is much slower than the Core i5-6600 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.
LGA775
Sockethelp
LGA1151Allendale
Codenamehelp
SkylakeDesktop
Segmenthelp
DesktopOn certain motherboards (Chipset feature)
Integrated GPUhelp
UHD Graphics 530DDR1, DDR2, DDR3
RAMhelp
2133 MHz (DDR3), 2133 MHz (DDR4)Not Overclockable
Overclock Supporthelp
Not OverclockableFrequently Asked Questions
compare_arrowsWhich is better, Core 2 Duo E4400 or Core i5-6600?expand_more
The Core 2 Duo E4400. It's 933% faster than the Core i5-6600 on average across 100+ games, scoring 3/100 vs 31/100 in our gaming rating.
speedHow much faster is Core 2 Duo E4400 than Core i5-6600?expand_more
933% 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, Core 2 Duo E4400 or Core i5-6600?expand_more
The Core 2 Duo E4400 is faster at both resolutions. Toggle the resolution selector above to see per-game FPS.
paidIs the Core 2 Duo E4400 worth buying in 2026?expand_more
It scores 3/100 in our gaming rating, faster than most CPUs on the market. Good buy if the price is right.
differenceWhat is the difference between Core 2 Duo E4400 and Core i5-6600?expand_more
Performance: Core 2 Duo E4400 scores 3/100, Core i5-6600 scores 31/100. They also differ in core count, clock speeds, L3 cache, and power draw. Full breakdown in the specs section above.
compressWill the Core 2 Duo E4400 or Core i5-6600 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 Core 2 Duo E4400 or Core i5-6600?expand_more
The Core 2 Duo E4400 is the stronger pick at 3/100. Compare your current CPU against it to see the exact FPS gain across 100+ games.
Popular Comparisons
2 Duo E4400 vs Ryzen 7 7800X3D2 Duo E4400 vs Ryzen 5 7600X2 Duo E4400 vs Ryzen 9 9950X3D2 Duo E4400 vs Ryzen 7 7700X2 Duo E4400 vs Ryzen 9 9900X2 Duo E4400 vs Ryzen 7 9850X3D2 Duo E4400 vs Ryzen 7 9700X2 Duo E4400 vs Ryzen 5 8500G2 Duo E4400 vs Ultra 7 265KF2 Duo E4400 vs Ryzen 9 9900X3D2 Duo E4400 vs i3-12100F2 Duo E4400 vs Ryzen 5 7500X3D2 Duo E4400 vs Ryzen 7 9800X3D2 Duo E4400 vs i5-46702 Duo E4400 vs Ryzen 5 3500X2 Duo E4400 vs Ryzen 5 55002 Duo E4400 vs Ultra 5 245K2 Duo E4400 vs Ultra 5 245KF2 Duo E4400 vs Ryzen 5 56002 Duo E4400 vs Ryzen 3 41002 Duo E4400 vs i5-4590Si5-6600 vs Ryzen 7 7800X3Di5-6600 vs Ryzen 5 7600Xi5-6600 vs Ryzen 9 9950X3Di5-6600 vs Ryzen 7 7700Xi5-6600 vs Ryzen 9 9900Xi5-6600 vs Ryzen 7 9850X3Di5-6600 vs Ryzen 7 9700Xi5-6600 vs Ryzen 5 8500Gi5-6600 vs Ultra 7 265KFi5-6600 vs Ryzen 9 9900X3Di3-12100F vs i5-6600i5-6600 vs Ryzen 5 7500X3Di5-6600 vs Ryzen 7 9800X3Di5-4670 vs i5-6600i5-6600 vs Ryzen 5 3500Xi5-6600 vs Ryzen 5 5500i5-6600 vs Ultra 5 245Ki5-6600 vs Ultra 5 245KFi5-6600 vs Ryzen 5 5600i5-6600 vs Ryzen 3 4100i5-4590S vs i5-6600