AMD EPYC 9115 vs AMD Ryzen 7 8840HX Comparison

The AMD Ryzen 7 8840HX and AMD EPYC 9115 occupy opposite ends of the processor spectrum: the Ryzen is a 12-core mobile part from the 8000 series built on Zen 4 (Dragon Range), while the EPYC is a 16-core server/workstation chip from the EPYC 9005 series using Zen 5 (Turin). In the database's head-to-head benchmark set, the EPYC 9115 wins 10 of 13 tests, with the Ryzen 7 8840HX taking 3. The average benchmark scores are close, 71797 for the Ryzen and 69288 for the EPYC, and both sit at the 94th percentile of all CPUs. The EPYC's wins are often large, especially in multi-threaded and memory-sensitive workloads, while the Ryzen's victories are narrower and concentrated in single-threaded Passmark tests.

Head-to-Head Benchmarks

The EPYC 9115 dominates the multi-threaded and compute-heavy tests. In Cinebench R23 multicore, the EPYC scores 42003 against the Ryzen's 25265, a 39.8% lead. The single-core Cinebench R23 result is even more lopsided: the EPYC posts 5929 versus 1857, a 68.7% advantage. Passmark physics shows a 47.8% gap (4188 vs 2185), and floating point math favors the EPYC by 23.8% (113853 vs 86747). Integer math follows with a 19.4% edge (181807 vs 146506). Data compression is 17.3% higher on the EPYC (600099 vs 496427), extended instructions 19.7% higher (45477 vs 36527), random string sorting 17.4% higher (70151 vs 57971), and multithread 14.7% higher (48936 vs 41732). Data encryption is the smallest EPYC win at 10.7% (33489 vs 29919).

The Ryzen 7 8840HX takes the remaining three tests. In Passmark single-thread, it scores 3958 against the EPYC's 3360, a 17.8% lead. The identical singlethread test repeats that result. The Ryzen also wins Passmark find prime numbers, 304 to 289, a 5.2% margin. These are the only benchmarks where the mobile chip comes out ahead, and the prime number win is the narrowest of all head-to-head results.

The pattern is clear: the EPYC 9115 is the stronger processor in nearly every category, with particularly large advantages in Cinebench and physics. The Ryzen's single-thread Passmark win is notable, but it does not offset the EPYC's broad superiority.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9115 has 16 cores and 32 threads, while the AMD Ryzen 7 8840HX has 12 cores and 24 threads.

Q: Which CPU has the higher boost clock?

A: The Ryzen 7 8840HX boosts to 5.10 GHz, compared to the EPYC 9115's 4.10 GHz. The Ryzen also has a higher base clock at 2.90 GHz versus 2.60 GHz.

Q: Does either processor support ECC memory?

A: The EPYC 9115 supports ECC memory, while the Ryzen 7 8840HX does not.

Q: Which chip has higher memory bandwidth?

A: The EPYC 9115 offers 576.0 GB/s over a twelve-channel memory bus, while the Ryzen 7 8840HX provides 83.2 GB/s over a dual-channel bus.

Q: Which processor includes integrated graphics?

A: The Ryzen 7 8840HX has a Radeon 610M integrated GPU, while the EPYC 9115 has no integrated graphics (N/A).

Q: What is the launch MSRP of the EPYC 9115?

A: The EPYC 9115 has a launch MSRP of $726. The Ryzen 7 8840HX has no recorded launch MSRP in the database.

Where Each One Wins

The EPYC 9115 is the clear choice for multi-threaded and memory-intensive workloads. It wins every Cinebench test, all Passmark math and compression tests, physics, encryption, extended instructions, random string sorting, and the multithread benchmark. Its 12-channel memory bus and 576.0 GB/s bandwidth make it suited for server and workstation tasks that demand high data throughput. The EPYC also supports ECC memory, which is critical for reliability in data-center environments.

The Ryzen 7 8840HX wins only in Passmark single-thread and prime number finding. Its single-thread score of 3958 is 17.8% higher than the EPYC's 3360, and it edges out the EPYC in prime number search by 5.2%. These results suggest the Ryzen is better for lightly threaded applications that rely on a single core, though the margin is modest. The Ryzen also has a lower TDP (55W vs 125W) and includes integrated graphics, making it a fit for mobile systems where power efficiency and a built-in display output are priorities.

Specification Differences

The two processors differ in nearly every core specification. The EPYC 9115 has 16 cores and 32 threads, while the Ryzen 7 8840HX has 12 cores and 24 threads. Base clocks are 2.60 GHz for the EPYC and 2.90 GHz for the Ryzen; boost clocks are 4.10 GHz and 5.10 GHz, respectively. TDP is 125W for the EPYC and 55W for the Ryzen. The EPYC uses AMD Socket SP5, the Ryzen uses AMD Socket FL1. The EPYC is built on a 4 nm process, the Ryzen on 5 nm. Transistor counts are 16,630 million for the EPYC and 13,140 million for the Ryzen. Die sizes are 2x 70.6 mm² for the EPYC and 2x 71 mm² for the Ryzen.

Cache configurations differ in L1 size: the EPYC has 80 KB per core, the Ryzen has 64 KB per core. Both have 1 MB L2 per core and 64 MB shared L3. Memory support is DDR5 for both, but the EPYC uses a twelve-channel bus with 576.0 GB/s bandwidth, while the Ryzen uses dual-channel with 83.2 GB/s. ECC memory is supported only on the EPYC. PCIe lanes are 128 (Gen 5) for the EPYC versus 28 (Gen 5) for the Ryzen. The Ryzen includes a Radeon 610M integrated GPU; the EPYC has none. The Ryzen has an unlocked multiplier; the EPYC is locked. Release dates are 2025-04-22 for the Ryzen and 2024-10-09 for the EPYC. The EPYC has a launch MSRP of $726; the Ryzen has no recorded MSRP.

Architecture Differences

The EPYC 9115 is based on Zen 5 (Turin) and uses a 4 nm process, while the Ryzen 7 8840HX uses Zen 4 (Dragon Range) on a 5 nm process. The EPYC's transistor count is higher at 16,630 million versus 13,140 million, and its die size is slightly smaller at 2x 70.6 mm² compared to 2x 71 mm². The L1 cache is larger on the EPYC (80 KB per core vs 64 KB per core), while L2 and L3 are identical. The EPYC's twelve-channel memory controller and 576.0 GB/s bandwidth are a major architectural advantage for server workloads, as is its 128-lane PCIe Gen 5 interface. The Ryzen's dual-channel memory and 28 PCIe lanes reflect its mobile focus. The EPYC supports ECC memory, a feature absent on the Ryzen. The Ryzen integrates a Radeon 610M GPU, which the EPYC lacks. The Ryzen has an unlocked multiplier, allowing overclocking, while the EPYC is locked. The EPYC is a server/workstation part, the Ryzen is a mobile part.

The Verdict

The data points to the AMD EPYC 9115 for anyone needing raw multi-threaded performance, high memory bandwidth, and ECC support. It wins 10 of 13 head-to-head benchmarks, with leads ranging from 10.7% in data encryption to 68.7% in Cinebench R23 single-core. Its 16 cores, 32 threads, and 576.0 GB/s memory bandwidth make it the appropriate choice for server, workstation, and heavy compute tasks. The EPYC's 125W TDP and lack of integrated graphics are acceptable trade-offs in a socketed server platform.

The AMD Ryzen 7 8840HX is the pick for mobile systems where power efficiency and a built-in GPU matter. It wins Passmark single-thread by 17.8% and prime number finding by 5.2%, and it has a lower 55W TDP. Its 12 cores and 24 threads are still substantial, but the EPYC's superior multi-threaded scores and memory subsystem give the server chip a decisive edge in most workloads. The Ryzen's unlocked multiplier and integrated graphics add flexibility for portable systems, but the benchmark record shows the EPYC 9115 as the stronger processor overall.