AMD Ryzen 7 5800 vs Intel Core i9-10900K Comparison

Head-to-Head Benchmarks

The benchmark data reveals a clear split between these two desktop processors, with the AMD Ryzen 7 5800 winning 16 of the 23 recorded comparisons while the Intel Core i9-10900K takes 7. The most dramatic Intel victory comes in PassMark random string sorting, where the Core i9-10900K posts a 40.6% advantage. That workload, which stresses memory access patterns and cache hierarchy, rewards the Intel part's design in a way that none of the other tests replicate.

The Intel chip also shows strength in 3DMark's heavily threaded workloads. In the 3DMark max threads test, the Core i9-10900K scores 8938 versus 7138 for the Ryzen 7 5800, a 25.2% margin. The 16-thread variant of the same suite shows a 15% lead at 8257 versus 7181. These results suggest that when the test can fully exploit the Intel processor's extra cores and threads, the scaling advantage is substantial. The 8-thread 3DMark test also goes to Intel by 9.3%, with scores of 6221 and 5692.

Data compression and extended instruction workloads also favor Intel. PassMark data compression shows the Core i9-10900K ahead by 18.6% (375336 versus 316429), and extended instructions show a 15.6% lead (24620 versus 21297). Floating point math is nearly a tie, with Intel ahead by just 3% (53123 versus 51588).

The Ryzen 7 5800's wins are more numerous and often larger. The single most lopsided result is PassMark data encryption, where AMD wins by 61.1% (20021 versus 7796). That is a massive gap, suggesting the Zen 3 architecture's cryptographic instructions are far more efficient. Prime number finding also goes heavily to AMD, with a 42.7% advantage (110 versus 63).

In Cinebench, the AMD processor wins every single variant. The R15 multicore test shows 2212 versus 1904, a 13.9% lead, and the single-core test shows 312 versus 268, a 14.1% margin. The R20 and R23 results repeat the same pattern: AMD leads by 13.9% in both multicore and single-core across both versions. The R23 multicore score of 21953 versus 18895 and single-core score of 3099 versus 2667 indicate that the Ryzen 7 5800's architecture delivers better per-thread performance that carries over even into fully threaded rendering workloads.

PassMark multithread also goes to AMD by 13.1% (25823 versus 22452), and integer math goes to AMD by 8% (92843 versus 85404). The physics test shows AMD ahead by 9.8% (1141 versus 1029). Single-thread performance across both PassMark entries shows AMD ahead by 8.3% (3393 versus 3113). The 3DMark low-thread tests also favor AMD: the 2-thread test shows a 6% lead (1795 versus 1688) and the 4-thread test shows a 3.8% lead (3443 versus 3313). The single-thread 3DMark test goes to AMD by 7.1% (916 versus 851).

What is striking is that Intel's wins are concentrated in tests that use many threads, while AMD wins almost everything else. The Ryzen 7 5800 wins in every Cinebench test, every single-thread test, and most PassMark workloads. The Core i9-10900K wins in the 3DMark tests that use 8, 16, or maximum threads, plus three specific PassMark workloads.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Core i9-10900K uses the Comet Lake architecture on a 14 nm process from Intel's own foundry, while the AMD Ryzen 7 5800 uses Zen 3, codenamed Vermeer, built on TSMC's 7 nm process. The node difference is significant: 14 nm versus 7 nm explains much of the efficiency and thermal gap between the two.

The core counts differ as well. The Intel part has 10 cores and 20 threads, while the AMD part has 8 cores and 16 threads. Despite having fewer cores, the Ryzen 7 5800 wins most multithreaded benchmarks, which points to superior per-core performance. The base clocks are 3.70 GHz for Intel and 3.40 GHz for AMD, but the boost clocks tell a different story: Intel boosts to 5.30 GHz while AMD boosts to 4.60 GHz. The Intel chip's higher boost clock does not translate into single-thread benchmark wins, which indicates that architectural efficiency matters more than raw clock speed.

Cache configurations also differ. Both have 64 KB of L1 cache per core. The L2 cache is 256 KB per core on Intel and 512 KB per core on AMD. The L3 cache shows a larger gap: 20 MB shared on Intel versus 32 MB shared on AMD. That 12 MB difference in shared L3 cache likely contributes to AMD's advantages in workloads that benefit from larger cache pools.

Memory bandwidth favors AMD at 51.2 GB/s versus 46.9 GB/s for Intel, though both use dual-channel DDR4. The PCIe capabilities differ as well: Intel offers Gen 3 with 16 lanes from the CPU, while AMD offers Gen 4 with 20 lanes. The AMD part also supports ECC memory, while the Intel part does not. The Intel chip includes UHD Graphics 630 integrated graphics, while the Ryzen 7 5800 has no integrated graphics at all.

The physical characteristics are starkly different. The AMD chip uses 4,150 million transistors on a 74 mm² die, while the Intel die is 206 mm² with no transistor count recorded in the database. The TDP ratings differ substantially: 125 watts for Intel versus 65 watts for AMD. The Intel part is end-of-life, while the AMD part remains active in production. The Intel processor launched on 2020-04-29 with a launch MSRP of $547, while the AMD processor launched on 2021-01-11 with no recorded MSRP.

Where Each One Wins

The Core i9-10900K is the choice for workloads that scale with thread count and benefit from its 10-core, 20-thread configuration. The 3DMark max threads result, with a 25.2% lead, and the 16-thread result, with a 15% lead, indicate that applications built to use many threads will see a measurable advantage. The 40.6% lead in random string sorting and 18.6% lead in data compression suggest that tasks involving sorting, compressing, or otherwise reorganizing large datasets favor the Intel design. The 15.6% lead in extended instructions suggests that SIMD-heavy workloads also favor Intel.

The Ryzen 7 5800 is the better performer in rendering, based on the Cinebench results. Every Cinebench test, from R15 to R23 and from single-core to multicore, shows AMD ahead by roughly 14%. The 61.1% lead in data encryption makes it the clear choice for cryptographic workloads, and the 42.7% lead in prime number finding points to strength in integer-heavy mathematical tasks. The 8% lead in integer math, 13.1% lead in PassMark multithread, and 9.8% lead in physics further support AMD's position for general productivity.

For single-threaded responsiveness, the Ryzen 7 5800 wins every recorded single-thread test: 8.3% in PassMark, 7.1% in 3DMark, and 13.9% in Cinebench R23. The low-thread 3DMark tests also go to AMD, with 6% and 3.8% leads in the 2-thread and 4-thread variants. This indicates that day-to-day tasks, most of which use few threads, will feel snappier on the AMD part.

The overall average benchmark scores are close: 27872 for Intel and 27535 for AMD. Both sit at the 79th percentile among all CPUs in the database. The nearest rivals for the Intel part include the AMD Ryzen 7 5800X3D at 27896, a 0.1% difference, and the Intel Core i5-12600KF at 27799, a 0.3% difference. The nearest rivals for the AMD part include the Intel Core Ultra 5 125H at 27507 and the Intel Core i5-12600K at 27578, both within 0.2%.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-10900K has 10 cores and 20 threads, while the AMD Ryzen 7 5800 has 8 cores and 16 threads.

Q: Which processor wins in Cinebench rendering tests?

A: The AMD Ryzen 7 5800 wins every Cinebench test. In R23 multicore, it scores 21953 versus 18895 for Intel, a 13.9% lead. In R23 single-core, it scores 3099 versus 2667, also a 13.9% lead.

Q: How do the two compare in data encryption?

A: The AMD Ryzen 7 5800 wins PassMark data encryption by a massive 61.1%, scoring 20021 versus 7796 for the Intel Core i9-10900K.

Q: What is the TDP difference between the two?

A: The Intel Core i9-10900K has a TDP of 125 watts, while the AMD Ryzen 7 5800 has a TDP of 65 watts.

Q: Which processor has larger L3 cache?

A: The AMD Ryzen 7 5800 has 32 MB of shared L3 cache, while the Intel Core i9-10900K has 20 MB of shared L3 cache.

Q: Do both processors support the same PCIe generation?

A: No. The Intel Core i9-10900K supports PCIe Gen 3 with 16 lanes from the CPU, while the AMD Ryzen 7 5800 supports PCIe Gen 4 with 20 lanes from the CPU.

Specification Differences

The two processors differ on nearly every core specification. The Intel Core i9-10900K uses 10 cores and 20 threads, while the AMD Ryzen 7 5800 uses 8 cores and 16 threads. Base clocks are 3.70 GHz for Intel and 3.40 GHz for AMD. Boost clocks are 5.30 GHz for Intel and 4.60 GHz for AMD. TDP is 125 watts for Intel and 65 watts for AMD.

The sockets are incompatible: Intel Socket 1200 for the Core i9-10900K and AMD Socket AM4 for the Ryzen 7 5800. The architectures are Comet Lake for Intel and Zen 3 for AMD. Process nodes are 14 nm for Intel and 7 nm for AMD. The foundries are Intel and TSMC, respectively. The AMD die size is 74 mm², while Intel's is 206 mm². The AMD part uses 4,150 million transistors, while Intel's transistor count is not recorded in the database.

L2 cache is 256 KB per core on Intel and 512 KB per core on AMD. L3 cache is 20 MB shared on Intel and 32 MB shared on AMD. Memory bandwidth is 46.9 GB/s for Intel and 51.2 GB/s for AMD. ECC memory support is present only on AMD. PCIe is Gen 3 with 16 lanes on Intel and Gen 4 with 20 lanes on AMD. Integrated graphics are present only on Intel, with UHD Graphics 630. The production status differs: end-of-life for Intel and active for AMD. The Intel launch MSRP was $547; no MSRP is recorded for AMD. Both have unlocked multipliers.

The Verdict

The data points to a straightforward conclusion: the AMD Ryzen 7 5800 is the stronger processor in most recorded benchmarks, winning 16 of 23 tests. Its advantages span single-thread performance, rendering, encryption, and general multithreaded workloads. The Cinebench results are particularly telling, with AMD leading by 13.9% across every version and thread count. The 61.1% encryption lead and 42.7% prime number lead show that AMD's architecture is not just faster in synthetic averages but specifically better in demanding computational tasks.

The Intel Core i9-10900K still has niches where it excels. The 25.2% lead in 3DMark max threads and 15% lead in 16-thread 3DMark show that its 10-core, 20-thread configuration can outmuscle the AMD part in highly parallel graphics-related workloads. The 40.6% lead in random string sorting and 18.6% lead in data compression make it the better option for those specific data manipulation tasks. The 15.6% lead in extended instructions adds another specialized use case.

For most users, the Ryzen 7 5800 is the better all-around choice. It wins every single-thread test, every Cinebench test, and most PassMark workloads. It does all of this with a 65 watt TDP compared to 125 watts for Intel, and with fewer cores. The Ryzen 7 5800 also remains in active production, while the Core i9-10900K is end-of-life. The Intel part's launch MSRP of $547 provides a reference point, but the performance data alone is sufficient: AMD wins more tests, wins by larger margins in its strongest areas, and does so more efficiently. The Core i9-10900K is a specialized tool for heavily threaded 3DMark-style workloads and data compression tasks. The Ryzen 7 5800 is the better general-purpose desktop processor.