AMD EPYC 7663 vs AMD EPYC 9275F Comparison

Head-to-Head Benchmarks

The benchmark data splits cleanly along architectural lines. The AMD EPYC 9275F wins 12 of 17 recorded comparisons, while the AMD EPYC 7663 takes 5. The 9275F's victories are concentrated in rendering, single-threaded workloads, and physics simulation. The 7663 dominates in data compression, encryption, floating-point math, integer math, and string sorting.

In Cinebench, the 9275F is consistently 3% ahead across every test. R15 multicore shows 7250 versus 7032, R20 multicore shows 30209 versus 29304, and R23 multicore shows 71927 versus 69773. Single-core results follow the same pattern: R15 at 1023 versus 992, R20 at 4264 versus 4137, and R23 at 10154 versus 9850. This narrow but uniform margin suggests the newer Zen 5 core design delivers better per-thread efficiency, even with fewer cores. The 9275F also leads passmark_multithread at 84620 versus 82087, a 3% edge, and passmark_physics at 12089 versus 8020, a decisive 33.7% advantage.

The 7663 fights back hard in throughput-oriented tasks. Data compression shows 1447020 versus 1212560, a 19.3% win. Data encryption is even more lopsided: 111725 versus 62664, a 78.3% advantage. Floating-point math goes to the 7663 at 251535 versus 201888 (24.6%), and integer math shows 468096 versus 317777 (47.3%). Random string sorting also favors the 7663 at 184367 versus 144037 (28%).

The 9275F counters in extended instructions (94889 versus 73719, a 22.3% win), find prime numbers (991 versus 676, 31.8% ahead), and single-thread performance (3810 versus 2606, 31.6% ahead). The prime-number test and single-thread scores highlight the 9275F's clock speed advantage, while the 7663's core count drives its wins in parallel integer and encryption workloads.

Architecture Differences

The two processors represent different generations of AMD's EPYC line. The 7663 is part of the EPYC 7003 series, built on Zen 3 architecture with the Milan codename. It uses a 7 nm process from TSMC with 33,200 million transistors across 8 dies, each 81 mm². The 9275F belongs to the EPYC 9005 series, using Zen 5 architecture with the Turin codename. It is manufactured on a 4 nm process with 66,520 million transistors across 8 dies, each 70.6 mm².

Core counts diverge sharply. The 7663 packs 56 cores and 112 threads, while the 9275F offers 24 cores and 48 threads. Base clocks tell the opposite story: the 7663 runs at 2000 MHz, the 9275F at 4100 MHz. Boost clocks follow suit at 3.50 GHz versus 4.80 GHz. The 9275F compensates for fewer cores with significantly higher frequencies. Thermal design power also differs: the 7663 is rated at 240 W, the 9275F at 320 W.

Cache hierarchies show per-core differences. The 7663 provides 64 KB L1 and 512 KB L2 per core, with 256 MB shared L3. The 9275F increases per-core cache to 80 KB L1 and 1 MB L2, keeping the same 256 MB shared L3. This larger per-core cache supports the 9275F's single-thread performance.

Memory architecture moves to a newer standard. The 7663 supports DDR4 over an eight-channel bus with 204.8 GB/s bandwidth. The 9275F supports DDR5 over a twelve-channel bus with 576.0 GB/s bandwidth, a substantial increase in memory throughput. Both support ECC memory. PCIe connectivity also advances: the 7663 offers Gen 4 with 128 lanes (CPU only), while the 9275F offers Gen 5 with 128 lanes (CPU only).

Sockets differ as expected. The 7663 uses AMD Socket SP3, the 9275F uses AMD Socket SP5. Neither processor has an unlocked multiplier. The 7663 carries part number 100-000000318100-100000318WOF, while the 9275F uses 100-000001144.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 7663 has 56 cores and 112 threads, while the AMD EPYC 9275F has 24 cores and 48 threads. The 7663 offers over twice the thread count.

Q: Why does the 9275F win Cinebench despite having fewer cores?

A: The 9275F runs at a 4100 MHz base clock and 4.80 GHz boost, compared to 2000 MHz and 3.50 GHz for the 7663. Higher clock speeds plus Zen 5 architecture deliver a 3% advantage across all Cinebench R15, R20, and R23 tests, both multicore and single-core.

Q: Which processor is better for encryption workloads?

A: The AMD EPYC 7663 wins data encryption by a wide margin, scoring 111725 versus 62664 for the 9275F, a 78.3% advantage. The 7663's 56 cores provide more parallel throughput for this workload.

Q: What are the memory differences between the two?

A: The 7663 uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. The 9275F uses DDR5 with a twelve-channel bus and 576.0 GB/s bandwidth. Both support ECC memory.

Q: How do single-thread scores compare?

A: The 9275F leads passmark_single_thread with 3810 versus 2606 for the 7663, a 31.6% advantage. This reflects the 9275F's higher clock speeds and newer architecture.

Q: Which processor has a higher average benchmark score?

A: The 7663 has a higher average benchmark score at 161973, placing it in the 98th percentile of all CPUs. The 9275F averages 133174, placing it in the 97th percentile. The 7663's wins in integer math, encryption, and compression pull its average up despite fewer overall wins.

Specification Differences

| Field | AMD EPYC 7663 | AMD EPYC 9275F |

|-------|---------------|----------------|

| Series | EPYC 7003 series | EPYC 9005 series |

| Cores | 56 | 24 |

| Threads | 112 | 48 |

| Base Clock | 2000 MHz | 4100 MHz |

| Boost Clock | 3.50 GHz | 4.80 GHz |

| TDP | 240 W | 320 W |

| Socket | AMD Socket SP3 | AMD Socket SP5 |

| Architecture | Zen 3 | Zen 5 |

| Codename | Milan | Turin |

| Process Node | 7 nm | 4 nm |

| Transistors | 33,200 million | 66,520 million |

| Die Size | 8x 81 mm² | 8x 70.6 mm² |

| L1 Cache | 64 KB per core | 80 KB per core |

| L2 Cache | 512 KB per core | 1 MB per core |

| Memory Support | DDR4 | DDR5 |

| Memory Bus | Eight-channel | Twelve-channel |

| Memory Bandwidth | 204.8 GB/s | 576.0 GB/s |

| PCIe | Gen 4, 128 Lanes | Gen 5, 128 Lanes |

| Release Date | 2021-03-14 | 2024-10-09 |

| Launch MSRP | $6366 | $3439 |

| Part Number | 100-000000318100-100000318WOF | 100-000001144 |

Both processors share 256 MB of shared L3 cache, ECC memory support, active production status, and the server/workstation market segment. Neither has integrated graphics or an unlocked multiplier.

The Verdict

The data supports a clear split recommendation. The AMD EPYC 9275F is the better choice for workloads that depend on single-thread speed, physics simulation, and extended instruction sets. It wins every Cinebench test, all single-thread benchmarks, passmark_physics, passmark_find_prime_numbers, and passmark_extended_instructions. Its higher clocks and DDR5 bandwidth make it the stronger all-around performer in rendering and latency-sensitive tasks.

The AMD EPYC 7663 is the better choice for massively parallel throughput in specific domains. It wins data compression, data encryption, floating-point math, integer math, and random string sorting. The 78.3% encryption advantage and 47.3% integer math advantage are decisive. For workloads that scale across many cores, the 7663's 56-core configuration delivers results the 9275F cannot match.

The 9275F's launch MSRP of $3439 is lower than the 7663's launch MSRP of $6366, but pricing should not be the deciding factor given the divergent performance profiles. The 9275F's average benchmark score of 133174 places it in the 97th percentile, while the 7663's 161973 places it in the 98th percentile. The 7663's higher average comes from its dominant wins in integer-heavy and encryption workloads, not from overall consistency.

Where Each One Wins

AMD EPYC 9275F wins in: Cinebench R15, R20, and R23 (multicore and single-core), passmark_multithread, passmark_physics, passmark_extended_instructions, passmark_find_prime_numbers, passmark_single_thread. The 3% Cinebench margins across all six tests show a uniform advantage. The 33.7% physics win and 31.8% prime-number win are the largest gaps in its favor. Its single-thread score of 3810 versus 2606 indicates strong performance for lightly threaded applications.

AMD EPYC 7663 wins in: passmark_data_compression, passmark_data_encryption, passmark_floating_point_math, passmark_integer_math, passmark_random_string_sorting. The encryption win (78.3%) and integer math win (47.3%) are the largest margins in the entire comparison. Data compression (19.3%), floating-point math (24.6%), and string sorting (28%) round out a set of wins that all favor parallel execution across many cores.

For database servers, data compression, encryption, and financial modeling with heavy integer math, the 7663's core count provides a measurable advantage. For high-frequency trading, physics simulation, and workloads with low thread counts but high clock sensitivity, the 9275F's speed and newer architecture make it the stronger pick. The 9275F also benefits from PCIe Gen 5 and DDR5 memory, which can improve I/O-bound applications even where raw compute scores are close.