AMD EPYC 9654 vs AMD Ryzen 7 8845HS Comparison

The AMD Ryzen 7 8845HS and the AMD EPYC 9654 represent two extremes of the same Zen 4 architecture. One is a 45-watt mobile processor designed for thin laptops, while the other is a 360-watt server behemoth with 96 cores. Comparing them directly is not about finding a winner, but about understanding how the same underlying design scales across different market segments. The recorded data shows a clear split: the EPYC dominates every multi-threaded and single-threaded workload in the head-to-head benchmarks, while the Ryzen offers a feature set focused on mobility and integrated graphics that the server chip lacks entirely.

Where Each One Wins

The EPYC 9654 is the uncontested performance leader in every benchmark where both processors were measured. In the head-to-head results, the EPYC 9654 wins all four tests, leaving the Ryzen 7 8845HS far behind. The largest margin comes in Cinebench R23 multi-core, where the EPYC scores 101,675 points compared to the Ryzen's 16,192. That is a 84.1% deficit for the mobile chip. Similarly, in Cinebench R23 single-core, the EPYC scores 14,354 versus the Ryzen's 1,769, an 87.7% gap. The EPYC also wins in Cinebench R15, both multi-core (10,248 vs 2,575, a 74.9% deficit) and single-core (1,446 vs 276, an 80.9% deficit). For any workload that scales with core count or raw clock speed, the server processor is the clear choice.

The Ryzen 7 8845HS has no benchmark wins in the head-to-head data. However, its strengths lie outside raw performance. The mobile chip integrates Radeon 780M graphics, which the EPYC lacks entirely. This makes the Ryzen suitable for systems that need display output without a separate graphics card. The Ryzen also fits into a 45-watt thermal envelope, a figure that is not comparable to the EPYC's 360-watt design. The Ryzen is built for Socket FP8, a mobile platform, while the EPYC uses Socket SP5 for server motherboards. The data shows that the Ryzen's value is in its form factor and integrated features, not in competing with a 96-core server part on raw throughput.

Architecture Differences

Both processors use the Zen 4 architecture, but they are built on different manufacturing nodes and for different purposes. The Ryzen 7 8845HS uses a 4 nm process from TSMC, while the EPYC 9654 uses a 5 nm process from the same foundry. The Ryzen is codenamed Hawk Point and belongs to the 8000 series, while the EPYC is codenamed Genoa and belongs to the EPYC 9004 series. The transistor counts reflect their scale: the Ryzen has 25,000 million transistors on a 178 mm² die, whereas the EPYC has 78,840 million transistors spread across 12 dies, each 72 mm².

The cache hierarchy is another major difference. Both have 64 KB of L1 cache per core and 1 MB of L2 cache per core. The L3 cache differs significantly: the Ryzen has 16 MB shared, while the EPYC has 384 MB shared. That is a 24-fold difference in L3 capacity. The EPYC's massive cache is designed to hold large server working sets, while the Ryzen's smaller cache is adequate for mobile workloads. The memory subsystem also diverges. The Ryzen supports dual-channel DDR5 with a memory bandwidth of 89.6 GB/s. The EPYC supports twelve-channel DDR5 with a memory bandwidth of 460.8 GB/s. The server chip also supports ECC memory, while the Ryzen does not.

PCIe connectivity differs as well. The Ryzen provides Gen 4 with 20 lanes (CPU only), while the EPYC provides Gen 5 with 128 lanes (CPU only). The EPYC's PCIe Gen 5 lanes allow for high-bandwidth expansion in server environments, while the Ryzen's Gen 4 lanes are typical for a mobile platform. The Ryzen has integrated Radeon 780M graphics; the EPYC has no integrated graphics. The Ryzen is a mobile part with a market segment of "Mobile," while the EPYC is a "Server/Workstation" part. Both are currently in active production, and neither has an unlocked multiplier.

Head-to-Head Benchmarks

The head-to-head benchmark results are one-sided. In Cinebench R15 multi-core, the EPYC 9654 scores 10,248 against the Ryzen's 2,575. This represents a 74.9% deficit for the Ryzen, meaning the EPYC delivers roughly four times the multi-core performance in this test. In Cinebench R15 single-core, the EPYC scores 1,446 versus the Ryzen's 276, an 80.9% deficit. The single-core gap is larger in percentage terms, which is notable because the Ryzen has a higher boost clock of 5.10 GHz compared to the EPYC's 3.70 GHz. Despite the clock disadvantage, the EPYC still wins single-core tests decisively.

In Cinebench R23 multi-core, the EPYC scores 101,675, a result that dwarfs the Ryzen's 16,192. The 84.1% deficit here is the largest in the entire head-to-head set. This test directly reflects the advantage of 96 cores and 192 threads versus 8 cores and 16 threads. In Cinebench R23 single-core, the EPYC scores 14,354 against the Ryzen's 1,769, an 87.7% deficit. This is the most extreme percentage gap recorded. The data indicates that the EPYC's higher base clock of 2.40 GHz (compared to the Ryzen's 3.80 GHz) does not hinder its single-core performance, likely due to its higher boost clock and larger cache.

The wins are all attributed to the EPYC, with four wins in the head-to-head set. The Ryzen has zero wins. These results are consistent with the EPYC's positioning as a server processor designed for maximum throughput. The Ryzen's strengths, such as its integrated graphics and lower power draw, are not captured in these CPU-only benchmarks. The benchmark data focuses purely on compute performance, where the EPYC's core count and cache size are decisive.

Specification Differences

The specification table reveals stark contrasts between the two processors. The Ryzen 7 8845HS has 8 cores and 16 threads, while the EPYC 9654 has 96 cores and 192 threads. The base clock differs: the Ryzen runs at 3.80 GHz, the EPYC at 2.40 GHz. The boost clock also differs: the Ryzen reaches 5.10 GHz, the EPYC reaches 3.70 GHz. The thermal design power is 45 watts for the Ryzen and 360 watts for the EPYC. The sockets are incompatible: the Ryzen uses AMD Socket FP8, the EPYC uses AMD Socket SP5.

The process node is different, with the Ryzen on 4 nm and the EPYC on 5 nm. The transistor count is higher for the EPYC (78,840 million) than for the Ryzen (25,000 million). The die size is listed as 178 mm² for the Ryzen and 12x 72 mm² for the EPYC, indicating a multi-die design for the server chip. Memory support is DDR5 for both, but the Ryzen uses a dual-channel bus while the EPYC uses a twelve-channel bus. Memory bandwidth is 89.6 GB/s for the Ryzen and 460.8 GB/s for the EPYC. ECC memory is supported only on the EPYC.

PCIe support is Gen 4 with 20 lanes for the Ryzen, and Gen 5 with 128 lanes for the EPYC. The Ryzen includes integrated Radeon 780M graphics, while the EPYC has no integrated graphics. The market segment is "Mobile" for the Ryzen and "Server/Workstation" for the EPYC. The release dates differ: the Ryzen was released on 2023-12-05, while the EPYC was released on 2022-11-09. The EPYC has a launch MSRP of $11805, which can be noted as a launch MSRP figure. The Ryzen has no launch MSRP recorded. Neither processor has an unlocked multiplier.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9654 has 96 cores and 192 threads, while the AMD Ryzen 7 8845HS has 8 cores and 16 threads.

Q: What is the difference in L3 cache size?

A: The EPYC 9654 has 384 MB of shared L3 cache, while the Ryzen 7 8845HS has 16 MB of shared L3 cache.

Q: Does the Ryzen 7 8845HS support ECC memory?

A: No, the Ryzen 7 8845HS does not support ECC memory. The EPYC 9654 does support ECC memory.

Q: Which processor has integrated graphics?

A: The Ryzen 7 8845HS has integrated Radeon 780M graphics. The EPYC 9654 has no integrated graphics.

Q: What is the memory bandwidth difference?

A: The Ryzen 7 8845HS has a memory bandwidth of 89.6 GB/s over a dual-channel bus. The EPYC 9654 has a memory bandwidth of 460.8 GB/s over a twelve-channel bus.

Q: Which processor has a higher boost clock?

A: The Ryzen 7 8845HS has a boost clock of 5.10 GHz, while the EPYC 9654 has a boost clock of 3.70 GHz.

The Verdict

The data points to a clear recommendation based on workload and platform. The AMD EPYC 9654 is the correct choice for server and workstation environments where multi-threaded performance is paramount. Its 96 cores and 192 threads deliver a 84.1% advantage over the Ryzen in Cinebench R23 multi-core, and its 384 MB L3 cache and 460.8 GB/s memory bandwidth are suited for large-scale data processing. The EPYC also supports ECC memory and provides 128 PCIe Gen 5 lanes, making it a foundation for enterprise systems. Its launch MSRP is $11805, reflecting its server-grade positioning.

The AMD Ryzen 7 8845HS is the choice for mobile computing. Its 45-watt TDP, integrated Radeon 780M graphics, and 5.10 GHz boost clock make it suitable for laptops and compact systems. It does not compete with the EPYC on raw compute, as the head-to-head benchmarks show a 74.9% to 87.7% deficit across all Cinebench tests. However, the Ryzen offers a complete package for a portable device, with dual-channel DDR5 memory and 20 PCIe Gen 4 lanes. No benchmark in the recorded data shows the Ryzen winning, but its feature set addresses a different market segment entirely.

For a buyer who needs maximum CPU throughput in a rack-mounted server, the EPYC 9654 is the only logical option. For a user who needs a processor for a thin-and-light laptop with integrated graphics, the Ryzen 7 8845HS is the appropriate part. The two processors share the Zen 4 architecture, but the production node, core count, memory channels, and power envelope place them in totally different categories. The benchmark results confirm that the EPYC is designed for throughput, while the Ryzen is designed for efficiency and integration. Choose accordingly.