AMD EPYC 7763 vs AMD EPYC 9634 Comparison
AMD EPYC 7763
EPYC 9634
PERFORMANCE BENCHMARKS
Analysis: AMD EPYC 7763 vs AMD EPYC 9634
The AMD EPYC 9634 and AMD EPYC 7763 are two server processors from different generations of AMD's EPYC lineup. The database records 17 head-to-head benchmark comparisons between them, and the EPYC 9634 wins all 17, with margins ranging from 16.1% to 76%. This analysis examines the benchmark results, architecture differences, and the use cases where each processor excels.
Head-to-Head Benchmarks
The EPYC 9634 dominates every recorded benchmark against the EPYC 7763. The largest margin appears in PassMark's find prime numbers test, where the EPYC 9634 scores 1176 versus 668, a 76% advantage. Physics follows at 59.5% (12291 vs 7708). Random string sorting shows a 42.9% lead (261134 vs 182676), and integer math is 40.3% ahead (725356 vs 516920). Extended instructions are 39.9% higher (137543 vs 98294), and data compression is 37.3% better (2236412 vs 1628973). Data encryption is 25.6% ahead (151943 vs 121001), floating point math 22.9% (353784 vs 287919), and single-thread performance is 16.1% higher (2924 vs 2518 in PassMark single thread).
Cinebench results are uniformly 27.6% in favor of the EPYC 9634 across R15, R20, and R23, for both single-core and multi-core runs. For example, Cinebench R23 multi-core scores 91752 for the EPYC 9634 and 71902 for the EPYC 7763; single-core scores are 12953 and 10150. PassMark's multithread test also shows a 27.6% delta (107944 vs 84591). The average benchmark score in the database is 244274 for the EPYC 9634 and 179916 for the EPYC 7763.
Looking at the broader competitive landscape, the EPYC 9634's average score places it 2.5% ahead of the Intel Xeon 6747P and 12.1% ahead of the AMD EPYC 9455P, while trailing the AMD EPYC 9684X by 8.5% and the Intel Xeon 6980P by 2.9%. The EPYC 7763, meanwhile, is 2.1% ahead of the Intel Xeon 6740P but 1.5% behind the AMD Ryzen Threadripper PRO 9975WX, 2.8% behind the AMD EPYC 8534P, and 4.2% behind the Intel Xeon 6740E.
Architecture Differences
The two processors belong to different generations and architectures. The EPYC 9634 is part of the EPYC 9004 series, built on Zen 4 (Genoa), while the EPYC 7763 is from the EPYC 7003 series, using Zen 3 (Milan). The EPYC 9634 uses a 5 nm process from TSMC, whereas the EPYC 7763 uses a 7 nm process. Transistor count is 78,840 million for the EPYC 9634 versus 33,200 million for the EPYC 7763. The die size is 12x 72 mm² for the EPYC 9634 and 8x 81 mm² for the EPYC 7763.
Core counts differ significantly: the EPYC 9634 has 84 cores and 168 threads, while the EPYC 7763 has 64 cores and 128 threads. Base clock is 2.25 GHz for the EPYC 9634 and 2.45 GHz for the EPYC 7763, but boost clock is higher on the EPYC 9634 at 3.70 GHz versus 3.50 GHz. TDP is 290 W for the EPYC 9634 and 280 W for the EPYC 7763.
Cache hierarchy also differs. Both have 64 KB of L1 per core, but the L2 cache is 1 MB per core on the EPYC 9634 versus 512 KB per core on the EPYC 7763. L3 cache is 384 MB shared on the EPYC 9634 and 256 MB shared on the EPYC 7763.
Memory support is a major differentiator. The EPYC 9634 supports DDR5 with a twelve-channel memory bus and a bandwidth of 460.8 GB/s. The EPYC 7763 uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. Both support ECC memory. PCIe generation differs: the EPYC 9634 offers Gen 5 with 128 lanes (CPU only), while the EPYC 7763 offers Gen 4 with 128 lanes. Sockets are different: the EPYC 9634 uses AMD Socket SP5, the EPYC 7763 uses SP3.
Release dates are 2022-11-09 for the EPYC 9634 and 2021-03-14 for the EPYC 7763. The EPYC 9634 has a launch MSRP of $10304, and the EPYC 7763 has a launch MSRP of $7890.
Where Each One Wins
In the recorded head-to-head benchmarks, the EPYC 7763 does not win a single test. The EPYC 9634 dominates across all 17 comparisons. The EPYC 7763's only advantages are a lower TDP (280 W versus 290 W) and a lower launch MSRP ($7890 versus $10304). It also has a higher base clock (2.45 GHz versus 2.25 GHz), but that does not translate into any benchmark victory. The EPYC 9634 wins in every category: single-thread, multi-thread, math, encryption, compression, and physics.
For workloads that rely on the tested metrics, the EPYC 9634 is clearly superior. The EPYC 7763 might be considered for environments where the lower TDP is critical, or where the older socket and DDR4 memory are already in place, but the performance data shows no scenario where it beats the EPYC 9634.
FAQ
Q: Which processor has more cores?
A: The AMD EPYC 9634 has 84 cores and 168 threads, while the AMD EPYC 7763 has 64 cores and 128 threads.
Q: What are the memory bandwidth differences?
A: The EPYC 9634 supports DDR5 with a twelve-channel bus and 460.8 GB/s bandwidth. The EPYC 7763 uses DDR4 with an eight-channel bus and 204.8 GB/s.
Q: How do the L3 caches compare?
A: The EPYC 9634 has 384 MB of shared L3 cache, while the EPYC 7763 has 256 MB.
Q: Which has a higher boost clock?
A: The EPYC 9634 boosts to 3.70 GHz, the EPYC 7763 to 3.50 GHz.
Q: What is the largest single benchmark margin between them?
A: In PassMark's find prime numbers test, the EPYC 9634 scores 1176 versus 668, a 76% advantage.
Q: Which processor has a lower TDP?
A: The EPYC 7763 has a TDP of 280 W, compared to 290 W for the EPYC 9634.
The Verdict
The benchmark data is unambiguous: the AMD EPYC 9634 outperforms the AMD EPYC 7763 in every recorded test. With 17 wins out of 17, the EPYC 9634 offers higher single-thread and multi-thread performance, better memory bandwidth, and larger caches. The EPYC 7763's advantages are limited to a lower TDP and a lower launch MSRP, but neither of those factors affects the measured performance scores. For any workload that benefits from the tested benchmarks, the EPYC 9634 is the stronger choice. The EPYC 7763 remains a viable option only for systems that require its specific socket, memory type, or power envelope, but it cannot match the EPYC 9634 in raw performance.