AMD EPYC 7443 vs Intel Core i5-9600K Comparison

Head-to-Head Benchmarks

The benchmark data paints an unambiguous picture: the AMD EPYC 7443 dominates the Intel Core i5-9600K across every recorded test. In the six head-to-head comparisons, the EPYC 7443 wins all six, with the i5-9600K failing to claim a single victory. The margins are staggering, often exceeding 80% in favor of the server processor.

Starting with Cinebench R15 multi-core, the EPYC 7443 scores 4856 against the i5-9600K's 912, a delta of -81.2% for the Intel part. That is not a close contest; it is a different performance tier entirely. The single-core R15 result follows the same pattern: 685 for the EPYC versus 128 for the i5, again a -81.3% gap. Even in single-threaded workloads, where the i5's higher boost clock might be expected to help, the EPYC's Zen 3 architecture pulls far ahead.

Moving to Cinebench R20, the EPYC 7443 posts 20236 multi-core and 2856 single-core, while the i5-9600K manages 3803 and 536 respectively. The deltas remain consistent at -81.2% for both. Cinebench R23 continues the trend: 48183 multi-core for the EPYC versus 9055 for the i5, and 6802 single-core versus 1278. Every single benchmark shows the same approximate 81% deficit for the Intel chip, which indicates a fundamental throughput advantage rather than a workload-specific quirk.

The data also shows the i5-9600K holding its own in the broader database context. Its average benchmark score is 14605, which places it in the 69th percentile of all CPUs tracked. The EPYC 7443 has an average score of 13936, landing in the 68th percentile. This is a curious inversion: the EPYC wins every head-to-head test by huge margins, yet its aggregate percentile is slightly lower. The explanation lies in the benchmark set. The i5's recorded scores include PassMark tests such as data compression (148639), integer math (29215), and floating point math (24913). The EPYC's recorded data only includes Cinebench results, which are heavily multi-threaded and scale with core count. The average benchmark score for the i5 is 14605, while the EPYC sits at 13936, a difference of roughly 4.8%. However, this aggregate metric is misleading when comparing a desktop consumer chip to a server processor, because the available test suites differ.

The nearest rivals in the database further contextualize both chips. The i5-9600K's closest competitor is the AMD Ryzen 5 5500U, with an average score of 14589 and a delta of just 0.1%. That is a statistical tie. The EPYC 7443's nearest rival is the Intel Core i5-10400, which scores 14037 and is -0.7% relative to the EPYC. In other words, despite the EPYC's massive multi-core advantage in Cinebench, its overall database average is comparable to mainstream desktop parts, because the recorded benchmark coverage is incomplete.

FAQ

Q: Which processor wins the most head-to-head benchmarks?

A: The AMD EPYC 7443 wins all six recorded head-to-head tests. The Intel Core i5-9600K wins none. The deltas range from -81.2% to -81.3% across Cinebench R15, R20, and R23, both single-core and multi-core variants.

Q: How large is the multi-core performance gap?

A: In Cinebench R23 multi-core, the EPYC 7443 scores 48183 while the i5-9600K scores 9055, a deficit of -81.2% for the Intel chip. The R20 multi-core test shows 20236 versus 3803, and R15 multi-core shows 4856 versus 912, all with the same -81.2% delta.

Q: Does the i5-9600K win in single-core tests?

A: No. The EPYC 7443 wins every single-core test as well. In Cinebench R23 single-core, the EPYC scores 6802 against the i5's 1278. The R20 single-core result is 2856 versus 536, and R15 single-core is 685 versus 128. The i5's boost clock of 4.60 GHz does not translate into a win against the EPYC's 4.00 GHz boost.

Q: How do the two processors compare in overall database percentile?

A: The i5-9600K sits in the 69th percentile of all CPUs, while the EPYC 7443 sits in the 68th percentile. The i5's average benchmark score is 14605, and the EPYC's is 13936. This is despite the EPYC winning every direct comparison, because the i5 has additional PassMark results included in its average.

Q: What are the nearest rivals for each processor?

A: The i5-9600K's closest rival is the AMD Ryzen 5 5500U, with a delta of 0.1%. The EPYC 7443's closest rival is the Intel Core i5-10400, with a delta of -0.7%. Both chips are also near the AMD EPYC 7473X and Intel Xeon 6315P in the i5's case, and the AMD Ryzen Threadripper PRO 3975WX and AMD EPYC 7552 in the EPYC's case.

Where Each One Wins

The use-case split is stark. The AMD EPYC 7443 is the clear choice for any workload that scales with core count and memory bandwidth. It has 24 cores and 48 threads, compared to the i5-9600K's 6 cores and 6 threads. It also supports eight-channel memory with 204.8 GB/s of bandwidth, versus the i5's dual-channel 42.7 GB/s. For rendering, scientific computing, virtualization, or any server-side task, the EPYC's Cinebench results (48183 multi-core in R23) speak for themselves.

The Intel Core i5-9600K, despite losing every direct comparison, still has a place. Its recorded PassMark scores show strength in specific desktop tasks: data compression at 148639, integer math at 29215, floating point math at 24913, and random string sorting at 18313. These are the kinds of workloads found in everyday desktop use, light productivity, and older software that does not scale beyond a few threads. The i5 also has integrated UHD 630 graphics, which the EPYC lacks entirely. For a system without a discrete GPU, the i5 is the only one of the two that can output video.

The EPYC 7443 has no integrated graphics, so it requires a separate GPU for any display output. Its market segment is Server/Workstation, and its socket is AMD Socket SP3, which is not a consumer platform. The i5-9600K targets desktop users, fits Intel Socket 1151, and is end-of-life, while the EPYC remains active in production.

Specification Differences

The two processors differ in nearly every specification category. The i5-9600K has 6 cores and 6 threads, while the EPYC 7443 has 24 cores and 48 threads. Base clocks are 3.70 GHz for the i5 and 2.85 GHz for the EPYC. Boost clocks are 4.60 GHz and 4.00 GHz respectively. The i5 has a TDP of 95 watts; the EPYC draws 200 watts.

Memory configuration is another major divergence. The i5 uses dual-channel DDR4 with 42.7 GB/s of bandwidth and no ECC support. The EPYC uses eight-channel DDR4 with 204.8 GB/s of bandwidth and supports ECC memory. The i5's PCIe connectivity is Gen 3 with 16 lanes from the CPU, while the EPYC offers Gen 4 with 128 lanes.

The i5 includes integrated UHD 630 graphics; the EPYC has none. The i5 has an unlocked multiplier, the EPYC does not. The i5's market segment is Desktop, the EPYC's is Server/Workstation. The i5 is end-of-life and was released in October 2018. The EPYC is active and released in March 2021. The EPYC's launch MSRP is $2010. The i5's launch MSRP is not recorded in the database.

Architecture Differences

The architectural divide is generational. The Intel Core i5-9600K uses Coffee Lake, built on Intel's 14 nm process and fabricated by Intel. The AMD EPYC 7443 uses Zen 3, codenamed Milan, built on TSMC's 7 nm process. The EPYC's die consists of 4x 81 mm² chiplets, totaling 16,600 million transistors. The i5's transistor count and die size are not recorded.

Cache hierarchies also differ sharply. Both have 64 KB of L1 per core and the i5 has 256 KB of L2 per core, while the EPYC has 512 KB per core. The i5's L3 is 9 MB shared; the EPYC's is 128 MB shared. That is a 14x difference in L3 capacity, which directly benefits the EPYC in large working sets and multi-threaded server workloads.

The i5 belongs to the Core i5 (Coffee Lake Refresh) generation, while the EPYC is part of the EPYC 7003 series. The EPYC's socket is AMD Socket SP3, designed for multi-socket server platforms with massive PCIe lane counts. The i5's socket is Intel Socket 1151, a mainstream desktop platform. The EPYC's eight-channel memory controller and 128 PCIe Gen 4 lanes are server-class features; the i5's dual-channel controller and 16 Gen 3 lanes are consumer-class. The i5's unlocked multiplier is a desktop enthusiast feature, whereas the EPYC's locked multiplier reflects its fixed server role. In every architectural dimension, the EPYC is built for scale, while the i5 is built for single-socket desktop duty.