Intel Core i5-12600K vs Intel Core i9-10900K Comparison

Intel Core i9-10900K and Intel Core i5-12600K present a classic generational clash. The data shows the i5-12600K wins 17 of the 25 head-to-head benchmark comparisons, while the i9-10900K takes 8. Despite the i9’s higher core count and thread count, the i5’s architectural advantages in single-threaded and lightly-threaded workloads give it the overall edge. However, the i9 retains decisive victories in specific multi-threaded and data-heavy tasks, making the choice highly workload-dependent.

Head-to-Head Benchmarks

The i5-12600K dominates in single-thread and low-thread-count scenarios. In 3dMark single-thread, it scores 1016 versus 851 for the i9, a 16.2% advantage. The gap widens in 3dMark 2-thread, where the i5 leads by 15.1% (1989 vs 1688). This pattern repeats in Geekbench single-core, where the i5 posts 2190 against 1711, a 21.9% improvement. The PassMark single-thread test confirms the trend: 3926 for the i5 versus 3113 for the i9, a 20.7% delta.

The i5’s lead extends into multi-threaded synthetic tests despite having only 16 threads versus 20. In Cinebench R20 multicore, the i5 scores 9821 versus 7935 for the i9, a 19.2% margin. Cinebench R15 multicore shows an even larger gap: 2555 versus 1904, a 25.5% difference. Geekbench multicore also favors the i5, with 12599 versus 10583, a 16% lead. The i5 wins PassMark multithread with 27608 versus 22452, an 18.7% advantage, and PassMark floating point math with 67217 versus 53123, a 21% edge.

The i5’s most striking victory comes in PassMark data encryption, where it scores 18485 versus 7796, a massive 57.8% delta. It also wins PassMark physics (1525 vs 1029, 32.5% ahead) and PassMark find prime numbers (91 vs 63, 30.8% ahead). The i5 leads in 3dMark 4-thread by 12.7% (3794 vs 3313) and in Cinebench R20 single-core by 19.2% (1386 vs 1120).

The i9-10900K, however, wins the heaviest multi-threaded workloads. In Cinebench R23 multicore, it scores 18895 versus 17491 for the i5, an 8% advantage. This is notable because the i5 wins R15 and R20 multicore, but the i9 takes R23. The i9 also leads in 3dMark max-threads with 8938 versus 7966, a 12.2% margin, and in 3dMark 16-threads with 8257 versus 7975, a 3.5% edge. The i9 wins 3dMark 8-threads narrowly, 6221 versus 6144, a 1.3% delta.

In data-oriented tasks, the i9 shows strength. PassMark data compression favors the i9, 375336 versus 344071, a 9.1% win. PassMark extended instructions go to the i9, 24620 versus 22002, an 11.9% margin. The i9’s biggest win is PassMark random string sorting, where it scores 46389 versus 35704, a 29.9% advantage. The i9 also edges out the i5 in PassMark integer math, 85404 versus 87776, but that is a 2.7% loss for the i9.

The single-core Cinebench R23 result is anomalous. The i9 scores 2667 versus 1907 for the i5, a 39.9% delta in favor of the i9. This contradicts the other single-thread tests, where the i5 leads by 16-21%. The data suggests the i9 has a specific advantage in this Cinebench R23 single-core workload, but it does not translate to other single-threaded benchmarks.

The Verdict

The i5-12600K is the better all-around processor based on benchmark results. It wins 17 of 25 comparisons, including all major single-thread tests and several multi-threaded tests like Cinebench R20 and Geekbench multicore. Its 57.8% lead in data encryption and 32.5% lead in physics indicate superior computational efficiency per thread. The i5 also matches the i9 in overall percentile ranking, both at 79% versus all CPUs, and its average benchmark score of 27578 is only 1% lower than the i9’s 27872.

The i9-10900K is the choice for specific multi-threaded scenarios. It wins Cinebench R23 multicore by 8%, 3dMark max-threads by 12.2%, and PassMark random string sorting by 29.9%. For workloads that heavily use 10 cores or more with high thread counts, the i9’s 20 threads provide an edge over the i5’s 16. The i9 also leads in data compression by 9.1% and extended instructions by 11.9%.

Users who prioritize single-thread responsiveness, encryption, physics, or general multi-threaded productivity should pick the i5-12600K. Users who need maximum performance in Cinebench R23 multicore, random string sorting, or max-thread 3dMark workloads should pick the i9-10900K. The i9 also has a higher launch MSRP of $547 versus $289 for the i5, but the performance data does not justify that premium for most tasks.

FAQ

Q: Which CPU has the higher boost clock?

A: The Intel Core i9-10900K has a boost clock of 5.30 GHz, while the Intel Core i5-12600K has a boost clock of 4.90 GHz.

Q: How do the two CPUs compare in Cinebench R20 multicore performance?

A: The i5-12600K scores 9821 in Cinebench R20 multicore, which is 19.2% higher than the i9-10900K’s score of 7935.

Q: Does the i9-10900K win any multi-threaded benchmarks?

A: Yes, the i9-10900K wins Cinebench R23 multicore (18895 vs 17491, 8% ahead), 3dMark max-threads (8938 vs 7966, 12.2% ahead), and 3dMark 16-threads (8257 vs 7975, 3.5% ahead).

Q: What is the biggest performance gap between the two CPUs?

A: The largest delta is in PassMark data encryption, where the i5-12600K leads by 57.8% with a score of 18485 versus 7796 for the i9-10900K.

Q: Which CPU has more threads?

A: The i9-10900K has 20 threads, while the i5-12600K has 16 threads. The i9 also has 10 cores, matching the i5’s 10 cores, but the i5 uses a hybrid architecture.

Q: How do the average benchmark scores compare?

A: The i9-10900K has an average benchmark score of 27872, while the i5-12600K has an average of 27578, a difference of about 1%.

Specification Differences

The two CPUs differ in several key specifications. The i9-10900K has 20 threads, while the i5-12600K has 16 threads. The i9’s boost clock is 5.30 GHz, while the i5’s is 4.90 GHz. The base clock is identical at 3.70 GHz. The i9 uses Intel Socket 1200, while the i5 uses Intel Socket 1700. The i9 has a die size of 206 mm², while the i5 has a die size of 215 mm².

Cache configurations differ significantly. The i9 has 64 KB of L1 cache per core and 256 KB of L2 cache per core, while the i5 has 80 KB of L1 cache per core and 1.25 MB of L2 cache per core. Both share 20 MB of L3 cache. Memory support differs: the i9 supports DDR4 only, while the i5 supports both DDR4 and DDR5. The i9 has a memory bandwidth of 46.9 GB/s, while the i5’s memory bandwidth is not recorded.

PCIe support differs: the i9 has PCIe Gen 3 with 16 lanes (CPU only), while the i5 has PCIe Gen 4 with 20 lanes (CPU only). The integrated graphics differ: the i9 has UHD Graphics 630, while the i5 has UHD Graphics 770. Production status differs: the i9 is end-of-life, while the i5 is active. The launch MSRP is $547 for the i9 and $289 for the i5. The release dates are 2020-04-29 for the i9 and 2021-11-03 for the i5.

Architecture Differences

The i9-10900K is based on Comet Lake architecture, built on a 14 nm process node. The i5-12600K is based on Alder Lake architecture, built on a 10 nm process node. Both are manufactured by Intel. The i9 has a 206 mm² die, while the i5 has a 215 mm² die.

The i5-12600K uses a hybrid architecture with performance and efficiency cores, which explains its superior single-thread performance despite a lower boost clock. The i9-10900K uses a traditional homogeneous core design with 10 cores and 20 threads. The i5’s larger L2 cache per core (1.25 MB vs 256 KB) and larger L1 cache per core (80 KB vs 64 KB) contribute to its higher efficiency in many workloads.

The i5 supports both DDR4 and DDR5 memory, while the i9 supports only DDR4. The i5 has PCIe Gen 4 support with 20 lanes, while the i9 has PCIe Gen 3 with 16 lanes. The i5’s integrated graphics are newer (UHD Graphics 770) compared to the i9’s UHD Graphics 630. The i5 is an active product, while the i9 is end-of-life.

Where Each One Wins

The i5-12600K wins in single-threaded and lightly-threaded workloads. It leads in 3dMark single-thread, 2-thread, and 4-thread tests, with deltas of 16.2%, 15.1%, and 12.7% respectively. It dominates in Geekbench single-core (21.9% ahead) and PassMark single-thread (20.7% ahead). The i5 also wins in encryption (57.8% ahead), physics (32.5% ahead), and prime number finding (30.8% ahead). For general multi-threaded productivity, the i5 wins Cinebench R15 and R20 multicore, Geekbench multicore, and PassMark multithread, with margins ranging from 16% to 25.5%.

The i9-10900K wins in specific heavy multi-threaded workloads. It takes Cinebench R23 multicore by 8%, 3dMark max-threads by 12.2%, and 3dMark 16-threads by 3.5%. It also wins 3dMark 8-threads by 1.3%. In data-heavy tasks, the i9 leads in random string sorting by 29.9%, extended instructions by 11.9%, and data compression by 9.1%. The i9 also wins Cinebench R23 single-core by 39.9%, though this is an outlier compared to other single-thread tests.

For users running Cinebench R23 multicore, 3dMark max-threads, or data compression workloads, the i9 provides measurable advantages. For all other common workloads, including gaming, general productivity, and encryption, the i5 delivers superior performance. The i5’s active production status and newer architecture make it the more future-proof choice, while the i9’s end-of-life status limits its long-term viability.