AMD EPYC 9554 vs AMD Ryzen 7 7435HS Comparison

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9554 has 64 cores and 128 threads, while the AMD Ryzen 7 7435HS has 8 cores and 16 threads. The EPYC offers eight times the core count and eight times the thread count of the mobile Ryzen part.

Q: How do their single-core Cinebench R23 scores compare?

A: The EPYC 9554 scores 13,052 in Cinebench R23 single-core, while the Ryzen 7 7435HS scores 2,805. The EPYC leads by 365.3% in that test, which is surprising for a server processor against a mobile chip.

Q: What is the TDP difference between the two?

A: The EPYC 9554 has a TDP of 360 watts, whereas the Ryzen 7 7435HS has a TDP of 45 watts. The EPYC draws eight times the power budget of the Ryzen mobile part.

Q: Which processor has a higher boost clock?

A: The Ryzen 7 7435HS boosts to 4.50 GHz, while the EPYC 9554 boosts to 3.75 GHz. Despite the EPYC's lower boost clock, it still wins every head-to-head benchmark in the database.

Q: How do their memory buses differ?

A: The EPYC 9554 uses a twelve-channel DDR5 memory bus with 460.8 GB/s bandwidth, while the Ryzen 7 7435HS uses a dual-channel DDR5 bus with 76.8 GB/s bandwidth. The EPYC's memory bandwidth is six times higher.

Q: What percentile ranking does each processor hold?

A: The EPYC 9554 ranks in the 79th percentile of all CPUs, while the Ryzen 7 7435HS ranks in the 78th percentile. Despite the massive core-count gap, their percentile positions are nearly identical.

Architecture Differences

The AMD EPYC 9554 belongs to the EPYC 9004 series, built on the Zen 4 architecture with the codename Genoa. It uses a 5 nm process from TSMC and consists of 52,560 million transistors spread across eight chiplets, each measuring 72 mm². The Ryzen 7 7435HS, in contrast, belongs to the 7000 series and uses the Zen 3+ architecture with the codename Rembrandt-R. It is built on a 6 nm process from TSMC and uses a monolithic die measuring 210 mm².

The cache hierarchy shows fundamental design differences. The EPYC 9554 provides 64 KB of L1 cache per core, 1 MB of L2 cache per core, and a shared 256 MB L3 cache. The Ryzen 7 7435HS also provides 64 KB of L1 cache per core, but its L2 cache is 512 KB per core and its shared L3 cache is only 16 MB. The EPYC's L3 cache is 16 times larger, reflecting its server-oriented design for massive data sets and virtualized workloads.

The memory architecture diverges sharply. The EPYC 9554 supports DDR5 memory over a twelve-channel bus with a recorded bandwidth of 460.8 GB/s. The Ryzen 7 7435HS also supports DDR5, but over a dual-channel bus with 76.8 GB/s bandwidth. Both support ECC memory, which is notable for a mobile processor. The PCIe capabilities differ as well: the EPYC offers Gen 5 with 128 lanes from the CPU, while the Ryzen mobile part offers Gen 4 with 20 lanes.

The sockets reflect their market segments. The EPYC 9554 uses AMD Socket SP5, designed for server and workstation platforms. The Ryzen 7 7435HS uses AMD Socket FP7, a mobile socket. Neither processor has an unlocked multiplier, so both are locked for overclocking. The EPYC 9554 launched with a release date of November 9, 2022 and a launch MSRP of $9087. The Ryzen 7 7435HS has no recorded release date or launch MSRP in the database.

The process node difference is small but meaningful: 5 nm versus 6 nm. The transistor count for the Ryzen part is not recorded, but its monolithic die size of 210 mm² contrasts with the EPYC's eight-chiplet design of 72 mm² each. The Ryzen 7 7435HS is marketed as a mobile processor, while the EPYC 9554 is marketed for server and workstation use. Both are currently active in production.

Head-to-Head Benchmarks

The database records six head-to-head benchmark comparisons between the EPYC 9554 and the Ryzen 7 7435HS, all in the Cinebench suite. The EPYC 9554 wins all six. The smallest margin is 365.2%, and the largest is 366.3%.

In Cinebench R15 multicore, the EPYC 9554 scores 9,319 against the Ryzen 7 7435HS's 2,003, a 365.3% lead. In R15 single-core, the EPYC scores 1,315 against 282, a 366.3% lead. The single-core margin is slightly larger than the multicore margin, which is notable given that the EPYC's boost clock is 3.75 GHz versus the Ryzen's 4.50 GHz.

Cinebench R20 shows the same pattern. The EPYC 9554 scores 38,831 in multicore against 8,346 for the Ryzen 7 7435HS, a 365.3% lead. In single-core, the EPYC scores 5,481 against 1,178, again a 365.3% lead.

Cinebench R23, the most recent version in the database, shows the EPYC 9554 scoring 92,457 in multicore against 19,873 for the Ryzen 7 7435HS, a 365.2% lead. In single-core, the EPYC scores 13,052 against 2,805, a 365.3% lead.

The consistency of these margins is striking. Across every Cinebench iteration and both single-core and multicore tests, the EPYC's advantage hovers near 365%. This suggests the performance gap is driven by a fundamental architectural difference rather than workload-specific behavior. The EPYC's 64 cores and 128 threads dominate the multicore tests as expected, but its single-core advantage of 365.3% over a chip with a higher boost clock points to the Zen 4 architecture's superior instructions-per-clock and the effects of the much larger L3 cache.

It is worth remembering the Ryzen 7 7435HS has additional benchmark scores in the database that the EPYC 9554 does not share. These include 3DMark thread scaling tests and PassMark workloads such as data compression, data encryption, floating point math, integer math, and physics. The EPYC 9554 has no recorded scores for these tests, so a direct comparison is not possible for those workloads.

The average benchmark scores in the database are close. The EPYC 9554 has an average benchmark score of 26,743, while the Ryzen 7 7435HS has 26,402. The EPYC's nearest rivals in the database include the AMD Ryzen 5 5500GT at 26,748 with a delta of 0%, the Intel Core i7-12700H at 26,717 with a delta of 0.1%, the Intel Core i9-11900K at 26,639 with a delta of 0.4%, and the AMD Ryzen 5 7545U at 26,849 with a delta of -0.4%. The Ryzen 7 7435HS's nearest rivals include the AMD Ryzen 5 8640U at 26,462 with a delta of -0.2%, the Intel Core i9-12900HK at 26,469 with a delta of -0.3%, the Intel Core i7-1280P at 26,469 with a delta of -0.3%, and the AMD Ryzen 5 7600 at 26,324 with a delta of 0.3%.

Specification Differences

The core count is the most obvious difference: 64 cores for the EPYC 9554 versus 8 cores for the Ryzen 7 7435HS. Thread counts follow at 128 versus 16.

The base clocks are identical at 3.10 GHz for both processors. The boost clocks differ, with the EPYC 9554 reaching 3.75 GHz and the Ryzen 7 7435HS reaching 4.50 GHz. The mobile chip has the higher boost clock by 0.75 GHz.

The TDP values are 360 watts for the EPYC 9554 and 45 watts for the Ryzen 7 7435HS. The sockets differ: AMD Socket SP5 for the EPYC, AMD Socket FP7 for the Ryzen.

The architecture generation differs: Zen 4 for the EPYC 9554, Zen 3+ for the Ryzen 7 7435HS. The process nodes are 5 nm and 6 nm, both from TSMC. The EPYC's transistor count is recorded as 52,560 million, while the Ryzen's is not recorded. The die sizes are 8x 72 mm² for the EPYC and 210 mm² for the Ryzen.

The L2 cache per core differs: 1 MB for the EPYC versus 512 KB for the Ryzen. The L3 cache is 256 MB shared for the EPYC versus 16 MB shared for the Ryzen. The L1 cache is identical at 64 KB per core.

The memory bus widths differ: twelve-channel for the EPYC versus dual-channel for the Ryzen. Memory bandwidth is 460.8 GB/s versus 76.8 GB/s. Both support DDR5 and ECC memory.

The PCIe versions and lane counts differ: Gen 5 with 128 lanes for the EPYC versus Gen 4 with 20 lanes for the Ryzen. Neither has integrated graphics recorded in the database.

The market segments differ: server/workstation for the EPYC, mobile for the Ryzen. The EPYC has a recorded release date of November 9, 2022 and a launch MSRP of $9087. The Ryzen has no recorded release date or launch MSRP. Both have locked multipliers. The part numbers are 100-100000790 for the EPYC and 100-000001506 for the Ryzen.

The Verdict

The benchmark data is unambiguous. The EPYC 9554 wins every head-to-head comparison in the database, with margins consistently near 365% across all Cinebench R15, R20, and R23 tests, in both single-core and multicore modes. The Ryzen 7 7435HS has zero wins in the recorded head-to-head results.

The EPYC 9554 is the choice for workloads that scale with cores, threads, cache capacity, and memory bandwidth. Its 64 cores, 128 threads, 256 MB L3 cache, and 460.8 GB/s memory bandwidth are designed for server and workstation tasks. The Ryzen 7 7435HS, with 8 cores, 16 threads, 16 MB L3 cache, and 76.8 GB/s memory bandwidth, is built for mobile use with a 45 watt TDP.

The data also shows that the Ryzen 7 7435HS holds its own in the broader database. Its average benchmark score of 26,402 ranks in the 78th percentile of all CPUs, just one point below the EPYC's 79th percentile. Its nearest rivals include the Intel Core i9-12900HK and the AMD Ryzen 5 7600, both with deltas under 0.3%. This indicates that the mobile chip is competitive with mainstream desktop and high-end mobile processors in the aggregate metrics, even though it loses decisively to the EPYC in the shared Cinebench tests.

For a user choosing between these two, the decision rests on platform and power constraints. The EPYC 9554 requires a server platform with Socket SP5, twelve-channel memory, and a 360 watt power envelope. The Ryzen 7 7435HS fits into mobile systems with Socket FP7, dual-channel memory, and a 45 watt power envelope. The EPYC's launch MSRP of $9087 reflects its enterprise positioning, while the Ryzen has no recorded launch MSRP.

Where Each One Wins

The EPYC 9554 wins in every recorded head-to-head benchmark. Its strongest showing is in Cinebench R23 multicore, where it scores 92,457 against 19,873, a 365.2% lead. Its largest margin is in Cinebench R15 and R20 single-core tests, where it leads by 366.3%. The consistency of these margins suggests the EPYC wins across all Cinebench workloads, both single-threaded and multi-threaded.

The Ryzen 7 7435HS wins in no recorded head-to-head comparison. However, the database includes benchmarks for the Ryzen that are not recorded for the EPYC, so those workloads cannot be compared directly. The Ryzen's 3DMark scores show scaling from 888 in single-thread to 6,915 in 16-thread tests. Its PassMark scores include 310,038 in data compression, 18,648 in data encryption, 21,690 in extended instructions, 48,863 in floating point math, and 85,274 in integer math.

The Ryzen 7 7435HS also wins on power efficiency by the numbers available. Its TDP of 45 watts is one-eighth of the EPYC's 360 watts, yet it delivers roughly one-fourth of the EPYC's Cinebench R23 multicore score. In a power-constrained environment, the Ryzen delivers more performance per watt in the recorded data. Its higher boost clock of 4.50 GHz also suggests an advantage in lightly threaded, short-duration workloads, though the Cinebench single-core results do not reflect this.

The EPYC 9554 wins on raw throughput, core count, cache capacity, memory bandwidth, and PCIe connectivity. The Ryzen 7 7435HS wins on power efficiency, boost clock, and physical footprint. The choice depends on whether the workload demands absolute performance or mobile compatibility.