AMD EPYC 7443P vs Intel Core i9-14900KS Comparison

The AMD EPYC 7443P and Intel Core i9-14900KS are both 24-core processors, but they are engineered for entirely different worlds. The data shows a clear split: the Intel part dominates general-purpose and single-threaded workloads, while the AMD server chip counters with decisive wins in specialized server tasks. The overall average benchmark scores are nearly identical—81,661 for the EPYC versus 81,127 for the Core i9—a difference of just 0.7%, placing both in the 96th percentile of all CPUs.

Head-to-Head Benchmarks

The Intel Core i9-14900KS claims 12 of the 19 head-to-head benchmark victories, and its wins are often substantial. In the Geekbench suite, the margin is enormous: the Core i9 scores 23,931 in multi-core versus the EPYC’s 13,400, a 44% advantage, and 2,692 versus 1,672 in single-core, a 37.9% lead. The PassMark single-thread test tells a similar story, with the Core i9 at 4,815 against the EPYC’s 2,907, a 39.6% gap. Across all three Cinebench versions (R15, R20, R23), the Intel chip wins both multi-core and single-core tests by a consistent 5%. For example, Cinebench R23 multi-core shows 50,995 for Intel versus 48,433 for AMD, and single-core shows 7,199 versus 6,837. The Core i9 also wins PassMark floating-point math (153,975 versus 129,932, a 15.6% edge) and PassMark multithread (60,012 versus 56,981, a 5.1% advantage).

The AMD EPYC 7443P, however, wins 7 benchmarks, and its victories are concentrated in areas that matter for server workloads. The largest win is in PassMark find prime numbers, where the EPYC scores 410 against Intel’s 244, a 68% advantage. PassMark physics shows a 40.4% lead (4,748 versus 3,381). Data encryption is another strong point: 57,263 versus 47,717, a 20% win. The EPYC also takes PassMark integer math (232,632 versus 212,644, up 9.4%), random string sorting (95,581 versus 89,789, up 6.5%), extended instructions (48,213 versus 45,524, up 5.9%), and data compression (820,859 versus 803,368, up 2.2%). These results show that while the EPYC loses the overall speed crown, it wins in precisely the specialized operations that define enterprise computing.

Architecture Differences

The two CPUs represent fundamentally different design philosophies. The AMD EPYC 7443P is built on the Zen 3 architecture (codename Milan) from the EPYC 7003 series, manufactured on a 7 nm process at TSMC. It uses a 4x 81 mm² die configuration with 16,600 million transistors. The Intel Core i9-14900KS is Raptor Lake-R, part of the Core 14th Gen series, built on Intel’s 10 nm process with a single 257 mm² die. The process node difference is a key factor: the EPYC’s smaller 7 nm transistor geometry versus Intel’s 10 nm node.

Cache hierarchies differ sharply. The EPYC provides 64 KB of L1 and 512 KB of L2 per core, but its L3 cache is a massive 128 MB shared pool. The Core i9 has 80 KB of L1 and 2 MB of L2 per core, with a much smaller 36 MB of shared L3. This 128 MB versus 36 MB difference in L3 is a major architectural distinction, explaining the EPYC’s strength in data-heavy workloads like compression and encryption. The socket and platform also diverge: the EPYC uses AMD Socket SP3, while Intel uses Socket 1700. The EPYC supports only DDR4 memory across an eight-channel bus with 204.8 GB/s bandwidth; the Core i9 supports both DDR4 and DDR5 across a dual-channel bus, with no bandwidth figure listed. The EPYC also offers PCIe Gen 4 with 128 lanes (CPU only), versus Intel’s PCIe Gen 5 with 16 lanes. Intel includes integrated UHD Graphics 770, while AMD has no integrated graphics. The EPYC’s multiplier is locked; the Core i9’s is unlocked.

Where Each One Wins

The Intel Core i9-14900KS is the clear winner for single-threaded performance and general productivity. Its 39.6% lead in PassMark single-thread and 37.9% lead in Geekbench single-core make it the obvious choice for software that relies on fast per-core execution. The 5% edge across all Cinebench versions, both single and multi-core, reinforces its strength in rendering and content creation. The 44% Geekbench multi-core win suggests better performance in everyday multi-threaded applications that do not scale to the EPYC’s server-specific optimizations. The Core i9 also wins floating-point math by 15.6%, indicating an advantage in scientific and engineering calculations that use floating-point operations.

The AMD EPYC 7443P wins in server-class workloads. The 68% lead in prime number calculation and 40.4% lead in physics tests point to raw integer and simulation strength. Data encryption at 20% faster is a direct enterprise benefit, as is the 9.4% integer math win and 6.5% random string sorting win. The 5.9% extended instructions lead and 2.2% data compression win complete a picture of a CPU designed for database, virtualization, and security workloads. The EPYC’s eight-channel memory and 128 MB L3 cache make it the better fit for memory-bandwidth-intensive server tasks, even though the Core i9 has higher raw clock speeds.

Specification Differences

The two processors differ on nearly every major specification. The EPYC has 24 cores and 48 threads; the Core i9 also has 24 cores but only 32 threads, reflecting Intel’s hybrid architecture with fewer total threads. Base clocks are 2.85 GHz for AMD versus 3.20 GHz for Intel, but boost clocks diverge dramatically: 4.00 GHz for the EPYC versus 6.20 GHz for the Core i9. The TDP also differs, with the EPYC rated at 200 W and the Core i9 at 150 W. Memory support is a key separator: the EPYC uses eight-channel DDR4, while the Core i9 uses dual-channel DDR4 or DDR5. The EPYC’s memory bandwidth is listed at 204.8 GB/s; Intel’s is not specified. PCIe lanes differ massively: 128 Gen 4 lanes for AMD versus 16 Gen 5 lanes for Intel. The EPYC has no integrated graphics; the Core i9 includes UHD Graphics 770. The EPYC’s multiplier is locked, while the Core i9’s is unlocked. Release dates are about three years apart: the EPYC launched on 2021-03-14, and the Core i9 on 2024-03-13. The EPYC’s launch MSRP is $1337; the Core i9’s is $689. The EPYC is a Server/Workstation segment part; the Core i9 is a Desktop part.

FAQ

Q: Which CPU has higher single-thread performance?

A: The Intel Core i9-14900KS wins every single-thread benchmark. It leads by 37.9% in Geekbench single-core (2,692 versus 1,672) and by 39.6% in PassMark single-thread (4,815 versus 2,907). This aligns with its 6.20 GHz boost clock versus the EPYC’s 4.00 GHz.

Q: How do the multi-core scores compare in Cinebench?

A: The Core i9 leads in all Cinebench multi-core tests by 5%. Cinebench R23 shows 50,995 for Intel versus 48,433 for AMD, R20 shows 21,417 versus 20,341, and R15 shows 5,140 versus 4,881.

Q: In which benchmarks does the AMD EPYC 7443P win by the largest margin?

A: The EPYC’s biggest win is PassMark find prime numbers at 410 versus 244, a 68% advantage. It also wins PassMark physics by 40.4% (4,748 versus 3,381) and PassMark data encryption by 20% (57,263 versus 47,717).

Q: What are the core and thread counts for each processor?

A: Both have 24 cores. The AMD EPYC 7443P has 48 threads, while the Intel Core i9-14900KS has 32 threads.

Q: How do the cache sizes differ?

A: The EPYC has 64 KB L1 and 512 KB L2 per core, with 128 MB shared L3. The Core i9 has 80 KB L1 and 2 MB L2 per core, with 36 MB shared L3. The EPYC’s L3 cache is nearly 3.5 times larger.

Q: Which processor supports more memory channels and PCIe lanes?

A: The EPYC supports eight-channel DDR4 memory and 128 PCIe Gen 4 lanes. The Core i9 supports dual-channel DDR4 or DDR5 and 16 PCIe Gen 5 lanes.

The Verdict

The data points to a decisive split based on workload. The Intel Core i9-14900KS is the superior processor for desktop, workstation, and general-purpose computing. Its wins in every Cinebench test, Geekbench test, and single-thread benchmark make it the choice for users who need fast response times, high frame rates in games, or quick compilation of single-threaded code. The 44% Geekbench multi-core lead and 15.6% floating-point win are significant for content creators and engineers who do not rely on server-specific instruction sets. With a lower TDP of 150 W versus 200 W, it also offers efficiency in a desktop socket, and its unlocked multiplier appeals to overclockers.

The AMD EPYC 7443P is the better choice for server and enterprise deployments. Its 68% win in prime number finding, 40.4% win in physics, and 20% win in data encryption are not niche—they are core server operations. The 9.4% integer math lead and 6.5% random string sorting win confirm its strength in database and transaction processing. The 128 MB L3 cache and eight-channel memory with 204.8 GB/s bandwidth provide the memory headroom that dual-channel desktop parts cannot match. The EPYC’s 128 PCIe Gen 4 lanes are essential for high-density storage and networking. While it loses the overall speed race, its average benchmark score of 81,661 is statistically tied with the Core i9’s 81,127 (0.7% difference), meaning the EPYC delivers comparable aggregate performance while winning the workloads that matter in a server rack. The verdict is clear: buy the Core i9 for the desktop, deploy the EPYC for the data center.