AMD EPYC 9654 vs AMD Ryzen 7 7840HS Comparison

Head-to-Head Benchmarks

The recorded benchmark data shows a decisive victory for the AMD EPYC 9654 across every shared test. The Ryzen 7 7840HS does not win a single head-to-head comparison, with the EPYC 9654 taking all four recorded benchmarks. The margin is substantial in every case, though the single-core results are particularly striking given the Ryzen 7's much higher boost clock.

In Cinebench R15 multi-core, the EPYC 9654 scores 10248 against the Ryzen 7 7840HS's 2222.84. That is a 78.3% deficit for the mobile chip, meaning the EPYC delivers roughly 4.6 times the multi-threaded rendering performance. The single-core R15 result is even more lopsided relative to expectations: the EPYC scores 1446 versus 274, an 81.1% gap. This is notable because the Ryzen 7 7840HS has a 5.10 GHz boost clock while the EPYC 9654 boosts to only 3.70 GHz, yet the EPYC still wins by a wide margin in the single-thread test.

Cinebench R23 shows the same pattern at larger scale. The EPYC 9654 posts 101675 in multi-core, while the Ryzen 7 7840HS manages 15102. The delta is 85.1%, indicating the EPYC is about 6.7 times faster in this workload. In R23 single-core, the EPYC scores 14354 against 1761, a gap of 87.7%. That is the largest percentage difference recorded in any shared benchmark, and it underscores that the EPYC's advantage is not limited to raw core count.

Looking at the broader database context, both processors sit at the 81st percentile among all CPUs, which places them in the same overall performance tier despite the extreme core-count difference. The Ryzen 7 7840HS has an average benchmark score of 29955, while the EPYC 9654 averages 29409. The Ryzen 7's nearest rivals include the AMD Ryzen 7 8845HS at identical 29955 (0% delta), the Ryzen 7 5800XT at 29879 (0.3% ahead), the Ryzen 7 7840H at 29868 (0.3% ahead), and the Ryzen 5 9600X at 29713 (0.8% ahead). The EPYC 9654's nearest rivals are the Ryzen 7 3800X at 29447 (0.1% behind), the Ryzen AI 7 345 at 29461 (0.2% behind), the Intel Core i5-13500HX at 29270 (0.5% ahead of the EPYC), and the Intel Xeon Phi 7210 at 29245 (0.6% ahead). These rival relationships show that while the EPYC dominates in the head-to-head tests, its aggregate database score is comparable to mainstream desktop and mobile parts.

Where Each One Wins

The AMD EPYC 9654 wins every shared benchmark category. That includes all four Cinebench tests, both multi-core and single-core variants. The data indicates no scenario in the recorded head-to-head set where the Ryzen 7 7840HS takes a victory.

For multi-threaded workloads, the EPYC 9654's 96 cores and 192 threads provide an overwhelming advantage. The R23 multi-core score of 101675 versus 15102 is the clearest evidence: rendering, compilation, simulation, and other parallel workloads will favor the EPYC by a massive margin. The R15 multi-core result of 10248 versus 2222.84 confirms this holds across different rendering engines and workload intensities.

For single-threaded tasks, the EPYC 9654 also wins, despite the Ryzen 7 7840HS having a higher boost clock. The R23 single-core gap of 87.7% is the largest in the dataset, suggesting the EPYC's Zen 4 implementation at server power levels delivers exceptional per-thread performance. The R15 single-core result of 1446 versus 274 reinforces this. Users who prioritize single-thread responsiveness may still find the EPYC unexpectedly competitive, though the 360W TDP versus 35W TDP indicates the power envelope is entirely different.

The Ryzen 7 7840HS does not win a single recorded head-to-head test. However, the database shows its strengths in other ways: it has a 5.10 GHz boost clock, a much lower TDP of 35W, and integrated Radeon 780M graphics. The EPYC 9654 has no integrated graphics. For mobile or power-constrained deployments, the Ryzen 7 is the only viable option, but on pure benchmark performance, the EPYC 9654 is the clear winner.

FAQ

Q: Which CPU wins in Cinebench R23 multi-core?

A: The AMD EPYC 9654 wins decisively with a score of 101675, compared to the Ryzen 7 7840HS's 15102. This represents an 85.1% advantage for the EPYC.

Q: Does the Ryzen 7 7840HS win any head-to-head benchmark?

A: No. The recorded data shows the EPYC 9654 winning all four shared tests: Cinebench R15 multi-core, R15 single-core, R23 multi-core, and R23 single-core. The Ryzen 7 7840HS records zero wins.

Q: How do the two CPUs compare in single-thread performance?

A: The EPYC 9654 wins in both single-thread tests. In Cinebench R23 single-core, it scores 14354 versus 1761 for the Ryzen 7, a gap of 87.7%. In R15 single-core, the EPYC scores 1446 against 274, an 81.1% difference.

Q: What are the core and thread counts?

A: The Ryzen 7 7840HS has 8 cores and 16 threads. The EPYC 9654 has 96 cores and 192 threads, which is 12 times the core count and 12 times the thread count.

Q: What is the TDP difference?

A: The Ryzen 7 7840HS has a TDP of 35W, while the EPYC 9654 has a TDP of 360W. That is a 325W difference in thermal design power.

Q: Which CPU has integrated graphics?

A: Only the Ryzen 7 7840HS has integrated graphics, specifically the Radeon 780M. The EPYC 9654 has no integrated graphics.

Specification Differences

The two processors differ in nearly every core specification. The Ryzen 7 7840HS has 8 cores and 16 threads, while the EPYC 9654 has 96 cores and 192 threads. The base clock of the Ryzen 7 is 3.80 GHz, and its boost clock is 5.10 GHz. The EPYC 9654 runs at a base of 2.40 GHz and boosts to 3.70 GHz. Despite the lower clocks, the EPYC still wins all single-thread tests.

TDP is another major divider: 35W for the Ryzen 7 versus 360W for the EPYC. The sockets differ as well, with the Ryzen 7 using AMD Socket FP8 and the EPYC using AMD Socket SP5. Memory channels scale accordingly: the Ryzen 7 supports dual-channel DDR5 with a memory bandwidth of 89.6 GB/s, while the EPYC supports twelve-channel DDR5 with a memory bandwidth of 460.8 GB/s.

PCIe connectivity also differs significantly. The Ryzen 7 provides Gen 4 with 20 lanes, while the EPYC provides Gen 5 with 128 lanes. Both support ECC memory. The Ryzen 7 has integrated Radeon 780M graphics, while the EPYC has none. The market segments are distinct: the Ryzen 7 is a mobile part, and the EPYC is a server/workstation part.

The process nodes differ by one generation: the Ryzen 7 7840HS uses a 4 nm process from TSMC, while the EPYC 9654 uses a 5 nm process from TSMC. Transistor counts reflect the core difference: the Ryzen 7 has 25,000 million transistors on a 178 mm² die, while the EPYC has 78,840 million transistors across 12 dies of 72 mm² each. The EPYC's L3 cache is 384 MB shared, compared to 16 MB shared on the Ryzen 7. Both have 64 KB L1 per core and 1 MB L2 per core.

The EPYC 9654 has a recorded release date of 2022-11-09 and a launch MSRP of $11805. The Ryzen 7 7840HS has no recorded release date or launch MSRP in the database. The EPYC's part number is 100-100000789, while the Ryzen 7 has multiple part numbers including 100-000000955(FP7r2), 100-000000964(FP7), and 100-000001129(FP8).

Architecture Differences

Both CPUs are built on Zen 4 architecture from AMD, but they target entirely different segments. The Ryzen 7 7840HS uses the Phoenix codename and belongs to the 7000 series, while the EPYC 9654 uses the Genoa codename and belongs to the EPYC 9004 series. The process node differs: 4 nm for the Ryzen 7, 5 nm for the EPYC. Both are fabricated by TSMC.

The cache hierarchy is similar at the per-core level: each has 64 KB L1 per core and 1 MB L2 per core. The shared L3 cache is where they diverge dramatically. The Ryzen 7 has 16 MB shared L3, while the EPYC has 384 MB shared L3. That is a 24-fold difference in aggregate cache capacity, which contributes to the EPYC's ability to handle massive working sets without memory stalls.

Die configuration also differs fundamentally. The Ryzen 7 is a monolithic 178 mm² die with 25,000 million transistors. The EPYC 9654 is a chiplet design with 12 dies, each measuring 72 mm², totaling 78,840 million transistors. This multi-die approach allows the EPYC to scale to 96 cores while maintaining active production status.

Memory architecture is another key difference. The Ryzen 7 uses dual-channel memory, while the EPYC uses twelve-channel memory, leading to a memory bandwidth of 89.6 GB/s versus 460.8 GB/s. The PCIe generation and lane count also differ: Gen 4 with 20 lanes for the Ryzen 7, Gen 5 with 128 lanes for the EPYC. Both support ECC memory, which is expected for the server part but noteworthy for a mobile chip.

The Ryzen 7 7840HS includes integrated Radeon 780M graphics, making it suitable for systems without a discrete GPU. The EPYC 9654 has no integrated graphics, requiring a separate GPU for any display output. The multiplier is locked on both processors, so neither supports manual overclocking.

The Verdict

The AMD EPYC 9654 is the clear performance winner on every recorded benchmark. It wins all four head-to-head tests, with advantages ranging from 78.3% to 87.7%. The data shows that the EPYC's 96 cores and 192 threads deliver overwhelming multi-threaded performance, and its single-thread results are equally dominant despite a lower boost clock. Anyone selecting a CPU for maximum benchmark throughput should choose the EPYC 9654.

The Ryzen 7 7840HS is not competitive in these shared workloads. Its best result is a 15102 in Cinebench R23 multi-core, which is only 14.8% of the EPYC's 101675. However, the Ryzen 7 has its own distinct advantages: a 35W TDP versus 360W, integrated Radeon 780M graphics, a 4 nm process node, and a 5.10 GHz boost clock. These features make it suitable for mobile devices, compact systems, or any deployment where power draw and physical footprint matter more than raw compute.

The database places both CPUs at the 81st percentile, meaning they are comparable in overall standing among all tested processors, even though their head-to-head results are lopsided. The Ryzen 7 7840HS's average benchmark score of 29955 is actually slightly higher than the EPYC 9654's 29409, which reflects the broader benchmark suite that includes mobile-oriented tests. The EPYC's nearest rivals include mainstream desktop and mobile chips like the Ryzen 7 3800X and the Ryzen AI 7 345, while the Ryzen 7's nearest rivals are similar 7000-series and newer mobile parts.

For a server or workstation with heavy parallel workloads, the EPYC 9654 is the only rational choice based on this data. For a laptop, ultrabook, or any power-sensitive application, the Ryzen 7 7840HS is the only option that fits the form factor. The verdict is not about which is better overall, but which fits the use case. The recorded benchmarks show that the EPYC 9654 is the performance king, while the Ryzen 7 7840HS wins on efficiency and integration.