AMD Ryzen 7 5800 vs Intel Core i5-12600KF Comparison

Head-to-Head Benchmarks

The benchmark data delivers a decisive verdict: the Intel Core i5-12600KF wins 20 of 23 head-to-head comparisons against the AMD Ryzen 7 5800. The most dramatic margin comes in PassMark physics, where the Intel part scores 1539 against 1141, a 34.9% advantage. That result indicates substantially stronger instruction scheduling and thread management in workloads that stress core coordination. Floating-point math also heavily favors Intel: 67074 versus 51588, a 30% lead, which is a striking gap for two desktop CPUs in the same performance tier.

Single-thread performance follows the same pattern. The i5-12600KF posts 3925 in PassMark single-thread, 15.7% ahead of the Ryzen 7 5800's 3393. Cinebench R23 single-core confirms the trend: 3302 versus 3099, a 6.6% edge. The 3DMark single-thread test shows 1016 versus 916, a 10.9% advantage. These results collectively show that Intel's Alder Lake architecture has a clear per-core throughput advantage, not just in synthetic integer loads but in the mixed instruction streams these benchmarks represent.

Multi-threaded workloads also tilt toward Intel, though by smaller margins. In Cinebench R23 multi-core, the i5-12600KF scores 23391 against 21953, a 6.6% lead. The 3DMark 16-thread test shows 7956 versus 7181, a 10.8% advantage, while 3DMark max-threads delivers the largest multi-thread win at 11.4%. PassMark multithread adds another Intel win: 27575 versus 25823, a 6.8% margin. Interestingly, the i5-12600KF achieves these multi-thread victories with 10 cores and 16 threads against the Ryzen 7 5800's 8 cores and 16 threads, meaning Intel's two extra physical cores are more than offsetting any per-thread efficiency advantage AMD's Zen 3 might claim elsewhere.

The AMD Ryzen 7 5800 does claim three wins, and they are worth isolating. PassMark data encryption goes to AMD: 20021 versus 18445, a 7.9% advantage. PassMark find prime numbers is the largest AMD win at 17.3% (110 versus 91). PassMark integer math also favors AMD: 92843 versus 87830, a 5.4% edge. These results indicate that AMD's Zen 3 core retains a lead in specific integer-heavy and cryptographic instruction patterns, even though it loses the broader synthetic suites.

The overall average benchmark scores place the two processors close: the i5-12600KF averages 27799, while the Ryzen 7 5800 averages 27535. That is only a 0.9% gap in aggregate, yet the distribution of wins is lopsided because Intel's victories are more numerous while AMD's are concentrated in fewer tests. The Intel part also lands in the 79th percentile among all CPUs, identical to the Ryzen 7 5800's 79th percentile, confirming that both sit in the same overall performance band despite the different win patterns.

Where Each One Wins

The i5-12600KF is the clear pick for mixed workload users. It wins every 3DMark thread-count test from 2 threads through max threads, with margins between 7.7% and 11.4%. It sweeps all three Cinebench generations in both single-core and multi-core. It wins every PassMark category except encryption, prime numbers, and integer math. That breadth matters: rendering, simulation, physics, compression, and general productivity all favor Intel.

The Ryzen 7 5800 is the specialist. Its 17.3% lead in prime-number finding suggests a particular strength in tight integer loops that repeatedly execute the same operations. Its 7.9% encryption win indicates that cryptographic workloads, which rely on specific instruction sequences, run faster on the AMD part. The 5.4% integer math victory reinforces AMD's advantage in pure integer arithmetic throughput. Users whose primary load is encryption, integer-heavy computation, or prime-number searching will see better results from the Ryzen 7 5800.

For gaming and everyday use, the single-thread numbers point to Intel. The 15.7% PassMark single-thread lead and the 10.9% 3DMark single-thread advantage translate directly to responsiveness in lightly threaded applications. For content creation and rendering, the Cinebench multi-core wins, even if modest at 6.6%, plus the 30% floating-point lead, make the i5-12600KF the more versatile choice. The Ryzen 7 5800 remains viable only for workloads that specifically match its three winning categories.

FAQ

Q: Which CPU is faster in single-threaded benchmarks?

A: The Intel Core i5-12600KF wins every single-thread test. It leads by 15.7% in PassMark single-thread (3925 versus 3393), 10.9% in 3DMark single-thread (1016 versus 916), and 6.6% in Cinebench R23 single-core (3302 versus 3099).

Q: Does the Ryzen 7 5800 win any benchmark?

A: Yes, it wins three of the 23 head-to-head tests: PassMark data encryption (20021 versus 18445, a 7.9% lead), PassMark find prime numbers (110 versus 91, a 17.3% lead), and PassMark integer math (92843 versus 87830, a 5.4% lead).

Q: How do the two CPUs compare in multi-threaded performance?

A: The i5-12600KF leads in every multi-threaded test. Cinebench R23 multi-core shows 23391 versus 21953 (6.6%), 3DMark 16-thread shows 7956 versus 7181 (10.8%), and 3DMark max-threads shows 7952 versus 7138 (11.4%).

Q: Which CPU has more cores and threads?

A: The i5-12600KF has 10 cores and 16 threads. The Ryzen 7 5800 has 8 cores and 16 threads. Both support 16 threads total, but Intel adds two extra physical cores.

Q: What is the average benchmark score difference?

A: The i5-12600KF averages 27799, while the Ryzen 7 5800 averages 27535. The Intel part is ahead by roughly 0.9% in aggregate, despite winning 20 of 23 individual tests.

Q: Do both CPUs support overclocking?

A: Yes, both the Intel Core i5-12600KF and the AMD Ryzen 7 5800 have an unlocked multiplier, so both can be overclocked.

Specification Differences

The two processors differ in nearly every foundational specification. The i5-12600KF uses 10 cores with 16 threads, while the Ryzen 7 5800 uses 8 cores with 16 threads. Base clock favors Intel at 3.70 GHz versus 3.40 GHz, and boost clock also favors Intel at 4.90 GHz versus 4.60 GHz. Thermal design power differs substantially: the Intel part is rated at 125 W, while the AMD part is rated at 65 W.

Socket compatibility is entirely separate. Intel uses Socket 1700, while AMD uses Socket AM4. Memory support also diverges: the i5-12600KF supports both DDR4 and DDR5, while the Ryzen 7 5800 supports only DDR4. Both use dual-channel memory buses, but the AMD part lists a memory bandwidth of 51.2 GB/s; the Intel part does not have a recorded bandwidth figure. ECC memory support is exclusive to the AMD Ryzen 7 5800, which supports ECC; the Intel part does not. Both use PCIe Gen 4 with 20 CPU lanes. Neither processor includes integrated graphics.

The launch MSRP for the i5-12600KF is $264; the Ryzen 7 5800 has no recorded launch MSRP. The i5-12600KF launched on 2021-11-03, while the Ryzen 7 5800 launched earlier on 2021-01-11. Both parts remain in active production.

Architecture Differences

The i5-12600KF is built on Intel's Alder Lake architecture, specifically the Alder Lake-S die, fabricated on Intel's 10 nm process at Intel's own foundry. The die size is 215 mm². Its cache hierarchy uses 80 KB of L1 per core, 1.25 MB of L2 per core, and 20 MB of shared L3. This is a hybrid design that combines different core types to balance throughput and efficiency.

The Ryzen 7 5800 uses AMD's Zen 3 architecture, codenamed Vermeer, fabricated on TSMC's 7 nm process. The die is much smaller at 74 mm², and AMD lists 4,150 million transistors. Its cache layout uses 64 KB of L1 per core, 512 KB of L2 per core, and 32 MB of shared L3. That larger L3 pool gives AMD a 32 MB versus 20 MB shared-cache advantage, which likely contributes to its wins in integer-heavy and encryption workloads that benefit from larger working sets.

The process node difference is notable: 10 nm for Intel versus 7 nm for AMD. The smaller TSMC node helps explain the Ryzen 7 5800's dramatically lower 65 W TDP despite similar performance. The i5-12600KF's higher 125 W TDP reflects both the older process and the additional two physical cores. The Intel part's larger die area, 215 mm² versus 74 mm², also reflects the more complex hybrid architecture and the different manufacturing process.

The two CPUs also differ in part numbers: the i5-12600KF is SRL4U, while the Ryzen 7 5800 is 100-000000456. Both are desktop parts with unlocked multipliers and no integrated graphics, but the underlying design philosophies are clearly distinct: Intel leans on more cores and higher clocks, while AMD leans on a smaller process, a larger shared cache, and lower power draw.

The Verdict

The data points to the Intel Core i5-12600KF as the stronger processor for the majority of desktop workloads. It wins 20 of 23 benchmarks, including every single-threaded test, every Cinebench test across all three versions, and every 3DMark thread-count configuration. The 30% lead in floating-point math and the 34.9% lead in physics are decisive margins that no other benchmark in the comparison approaches. Users building a system for rendering, simulation, general productivity, or mixed-use scenarios should choose the i5-12600KF without hesitation.

The Ryzen 7 5800 is the right choice only for specialized workloads that match its specific strengths. The 17.3% lead in prime-number finding, the 7.9% lead in data encryption, and the 5.4% lead in integer math define a narrow but real niche. Users whose workloads are dominated by cryptographic operations or pure integer arithmetic will find the AMD part faster. Its 65 W TDP and support for ECC memory also make it a sensible option for low-power or memory-reliability-sensitive builds, provided the workload fits its three winning categories.

The aggregate scores are close, with the i5-12600KF at 27799 and the Ryzen 7 5800 at 27535, and both sit in the 79th percentile of all CPUs. But the distribution of wins tells the real story: Intel wins broadly and consistently, while AMD wins narrowly and specifically. For a general-purpose desktop CPU, the i5-12600KF is the data-supported choice. For a targeted workload that matches AMD's three victories, the Ryzen 7 5800 is the data-supported choice. Every other use case favors Intel.