AMD EPYC 7663 vs AMD EPYC 8534P Comparison

The AMD EPYC 8534P and AMD EPYC 7663 are two distinct server processors that approach parallel workloads from opposite directions. The 8534P, built on the Zen 4c architecture, offers more cores and newer memory technology, while the 7663 leverages a mature Zen 3 design with higher clock speeds and a larger L3 cache. Benchmark data reveals a clear split: the 7663 dominates in single-threaded and latency-sensitive tasks, while the 8534P excels in throughput-heavy data processing. This analysis breaks down where each processor wins, what the head-to-head numbers imply, and which workloads favor which hardware.

Where Each One Wins

The AMD EPYC 7663 takes a commanding lead in almost every Cinebench test and several Passmark subtests, while the AMD EPYC 8534P counters with decisive victories in data-focused workloads. Looking at the head-to-head results, the 7663 wins 12 of 17 benchmark comparisons, while the 8534P takes only 5. This disparity stems from fundamental architectural trade-offs rather than simple core count advantages.

The 7663’s wins are concentrated in areas that reward higher per-core performance and lower latency. In Cinebench R23 multi-core, the 7663 scores 69,773 against the 8534P’s 61,115, a 12.4% advantage. The same 12.4% delta appears across all Cinebench R15, R20, and R23 tests, both single and multi-core. This consistency suggests the 7663’s higher boost clock (3.50 GHz vs 3.10 GHz) and larger L3 cache (256 MB vs 128 MB) provide a uniform edge in rendering-style workloads that scale with cache hits and clock speed. The 7663 also wins Passmark physics by a massive 54.3% margin (8,020 vs 3,667) and random string sorting by 29.8% (184,367 vs 129,479), both of which are latency-sensitive operations that benefit from the 7663’s lower core count but faster individual cores.

The 8534P’s wins are equally telling. It beats the 7663 in data compression by 23.8% (1,791,742 vs 1,447,020), extended instructions by 53.1% (112,860 vs 73,719), floating point math by 15.1% (289,443 vs 251,535), and integer math by 9.9% (514,526 vs 468,096). These are throughput-oriented tasks where the 8534P’s 64 cores (versus 56) and newer Zen 4c architecture shine. The 53.1% lead in extended instructions is particularly striking, indicating the 8534P’s AVX-512-style capabilities or newer instruction set extensions provide a substantial advantage in vectorized code.

The Verdict

The data suggests a clear workload-based split. For general-purpose compute, virtualization, or database workloads that involve mixed instruction streams, the AMD EPYC 7663 appears superior due to its consistent 12.4% lead in Cinebench and its dominance in physics and sorting operations. The 7663’s 98th percentile ranking against all CPUs matches the 8534P’s percentile, but its average benchmark score of 161,973 trails the 8534P’s 185,092. This discrepancy indicates that while the 7663 wins more individual tests, the 8534P’s massive wins in specific categories pull its average higher.

For data centers running compression, encryption, or floating-point-heavy analytics, the AMD EPYC 8534P is the stronger choice. Its 23.8% lead in data compression and 53.1% lead in extended instructions suggest that workloads using modern SIMD instructions will see dramatic speedups. The 8534P’s 9% lead in data encryption (121,728 vs 111,725) also positions it well for security-focused applications. However, the 7663’s 58.9% lead in find prime numbers (676 vs 278) and 54.3% lead in physics indicate that integer-heavy, branch-predictor-sensitive code runs significantly faster on the older chip.

Head-to-Head Benchmarks

The most lopsided result is Passmark extended instructions, where the 8534P scores 112,860 versus the 7663’s 73,719 — a 53.1% advantage. This is the single largest margin in either direction and suggests the 8534P’s newer microarchitecture processes vectorized code at nearly 1.5x the rate. In contrast, the 7663’s biggest win is in Passmark physics at 54.3% (8,020 vs 3,667), which is almost identical in magnitude but in the opposite direction.

The Cinebench results are uniformly 12.4% in favor of the 7663, from R15 multi-core (7,032 vs 6,160) to R23 single-core (9,850 vs 8,628). This consistency is remarkable — it implies that the 7663’s per-core advantage is stable across rendering workloads of varying thread counts. The Passmark multi-thread test also shows a 12.4% lead for the 7663 (82,087 vs 71,900), reinforcing this pattern.

The 8534P’s wins are more variable. Data compression shows a 23.8% lead, floating point math a 15.1% lead, and integer math a 9.9% lead. The smallest 8534P win is data encryption at 9%. The 7663’s wins range from 6.3% in single-thread tests to 58.9% in prime number finding, making it a more unpredictable performer across different workloads.

FAQ

Q: Why does the AMD EPYC 7663 win more benchmarks despite having fewer cores?

A: The 7663 has a higher boost clock (3.50 GHz vs 3.10 GHz) and double the L3 cache (256 MB vs 128 MB). These factors improve per-core performance and cache hit rates, which benefit latency-sensitive tasks like Cinebench rendering and Passmark physics.

Q: Which processor is better for data compression workloads?

A: The AMD EPYC 8534P wins Passmark data compression with a score of 1,791,742 versus the 7663’s 1,447,020, a 23.8% advantage. Its 64 cores and newer architecture provide superior throughput for compression algorithms.

Q: What explains the 53.1% lead in Passmark extended instructions for the 8534P?

A: The 8534P’s Zen 4c architecture supports newer instruction set extensions compared to the 7663’s Zen 3 design. This allows the 8534P to execute vectorized and SIMD code significantly faster, as evidenced by its 112,860 score versus 73,719.

Q: Is the 7663 always faster in single-threaded tasks?

A: Yes, the 7663 wins Passmark single-thread (2,606 vs 2,441) and all Cinebench single-core tests by 12.4%. Its higher boost clock and larger cache give it an edge in single-thread performance.

Q: How do these processors compare in memory bandwidth?

A: The 8534P supports DDR5 with six-channel memory and 230.4 GB/s bandwidth, while the 7663 uses DDR4 with eight-channel memory and 204.8 GB/s. Despite fewer channels, the 8534P offers 12.5% more bandwidth.

Q: Which processor has a better average benchmark score?

A: The 8534P has an average benchmark score of 185,092, while the 7663 averages 161,973. This reflects the 8534P’s large wins in specific Passmark tests, even though it loses more individual comparisons.

Architecture Differences

The two processors represent different generations of AMD’s EPYC lineup. The 8534P uses the Zen 4c architecture codenamed Siena, fabricated on a 5 nm process at TSMC with 35,500 million transistors across a 4x 73 mm² die configuration. The 7663 uses the Zen 3 architecture codenamed Milan, built on a 7 nm process with 33,200 million transistors across an 8x 81 mm² die setup. The 8534P’s smaller process node allows for higher core density, explaining its 64-core count versus the 7663’s 56 cores.

Cache configurations differ substantially. The 8534P has 1 MB of L2 cache per core and 128 MB of shared L3 cache, while the 7663 has 512 KB of L2 per core and 256 MB of shared L3. This means the 7663 offers double the L3 capacity, which is critical for workloads with large working sets. Both have 64 KB of L1 cache per core. The 8534P supports DDR5 memory over a six-channel bus, while the 7663 uses DDR4 over an eight-channel bus. The 8534P’s memory bandwidth of 230.4 GB/s exceeds the 7663’s 204.8 GB/s despite having fewer channels.

PCIe capabilities also differ: the 8534P provides Gen 5 with 96 lanes, while the 7663 provides Gen 4 with 128 lanes. This gives the 7663 more total lanes but older bandwidth per lane. Both are active production processors with ECC memory support, but they use different sockets — SP6 for the 8534P and SP3 for the 7663.

Specification Differences

The core and thread counts are the most obvious difference: the 8534P has 64 cores and 128 threads, while the 7663 has 56 cores and 112 threads. This 8-core advantage for the 8534P is offset by clock speeds. The 8534P runs at 2.30 GHz base and 3.10 GHz boost, whereas the 7663 runs at 2000.00 MHz base (effectively 2.00 GHz) and 3.50 GHz boost. The 7663’s 400 MHz boost advantage is significant for single-thread performance.

Thermal design power differs, with the 8534P rated at 200 TDP and the 7663 at 240 TDP. This means the 8534P delivers its 64 cores at lower power draw, a notable efficiency improvement. Memory support diverges completely: the 8534P uses DDR5 with six-channel bandwidth of 230.4 GB/s, while the 7663 uses DDR4 with eight-channel bandwidth of 204.8 GB/s. The 8534P’s PCIe Gen 5 with 96 lanes contrasts with the 7663’s Gen 4 with 128 lanes.

Release dates and pricing differ, with the 8534P launching in September 2023 at a launch MSRP of $4950, while the 7663 launched in March 2021 at a launch MSRP of $6366. The 8534P uses a newer process node (5 nm vs 7 nm) and has different transistor counts (35,500 million vs 33,200 million). The 7663’s larger die footprint (8x 81 mm² vs 4x 73 mm²) reflects its older design. Both processors lack integrated graphics and have locked multipliers. The 8534P’s part number is 100-000000875, while the 7663’s is 100-000000318100-100000318WOF.