AMD EPYC 8324P vs Intel Xeon 6521P Comparison

The Intel Xeon 6521P and AMD EPYC 8324P are both active, 5 nm server processors aimed at the same segment, yet they represent fundamentally different design philosophies. The Xeon 6521P, with its Granite Rapids architecture, focuses on higher clock speeds and raw single-thread muscle, while the EPYC 8324P, built on Zen 4c (Siena), prioritizes core count and efficiency. Benchmark data shows the Intel part wins 13 of 17 head-to-head tests, but the AMD chip secures crucial victories in specific workloads, making the choice highly dependent on the intended application.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 8324P has 32 cores and 64 threads, while the Intel Xeon 6521P has 24 cores and 48 threads. The AMD part offers a 33% advantage in core count.

Q: How do their average benchmark scores compare?

A: The Intel Xeon 6521P has an average benchmark score of 105,845, which is 2.4% higher than the EPYC 8324P’s 103,329. Both processors sit in the 97th percentile of all CPUs.

Q: Which chip has the higher boost clock, and what is the impact?

A: The Intel Xeon 6521P boosts to 4.10 GHz, significantly higher than the EPYC 8324P’s 3.00 GHz. This translates into a 36.8% lead for Intel in the Passmark single-thread test.

Q: What are the memory bandwidth specifications for each?

A: The Intel Xeon 6521P features eight-channel DDR5 memory with 409.6 GB/s bandwidth. The AMD EPYC 8324P uses six-channel DDR5, providing 230.4 GB/s.

Q: In which benchmark does the AMD EPYC 8324P show its largest margin of victory?

A: The AMD chip’s biggest win is in Passmark data encryption, where it scores 63,195 versus Intel’s 51,221, a delta of 18.9% in AMD’s favor.

Q: What are the launch MSRPs for these two processors?

A: The Intel Xeon 6521P has a launch MSRP of $1250, and the AMD EPYC 8324P has a launch MSRP of $1895.

Architecture Differences

The two processors diverge sharply in their architectural blueprints. The Intel Xeon 6521P is built on the Granite Rapids architecture, part of the Xeon 6 generation (Granite Rapids-SP), and manufactured by Intel on a 5 nm process. Its die size is a monolithic 598 mm². In contrast, the AMD EPYC 8324P uses the Zen 4c architecture with the codename Siena, part of the EPYC 8004 series, and is fabricated by TSMC on a 5 nm node. The AMD chip is a chiplet design, consisting of four separate 73 mm² dies, totaling 35,500 million transistors.

Cache hierarchies also differ notably. The Intel part allocates 112 KB of L1 cache and 2 MB of L2 cache per core, with a large 144 MB shared L3 cache. The AMD EPYC 8324P provides 64 KB of L1 and 1 MB of L2 per core, with 128 MB of shared L3. This means the Intel chip has double the L2 cache per core and 12.5% more L3 cache overall, which likely contributes to its strong single-threaded performance.

Memory architecture is another major split. Intel implements an eight-channel DDR5 memory bus, yielding a theoretical bandwidth of 409.6 GB/s. AMD opts for a six-channel configuration, capping bandwidth at 230.4 GB/s. This substantial 179.2 GB/s difference in memory bandwidth could be decisive for memory-intensive tasks like data compression. PCIe connectivity also differs, with Intel offering 136 Gen 5 lanes (CPU only) versus AMD’s 96 Gen 5 lanes. Both support ECC memory and lack integrated graphics, targeting the same server/workstation market.

The Verdict

The data points to a clear split based on workload type. The Intel Xeon 6521P is the superior choice for tasks that rely on high clock speeds and per-core performance. Its 4.10 GHz boost clock versus AMD’s 3.00 GHz gives it a commanding 36.8% lead in single-threaded Passmark tests and a 16.7% advantage across all Cinebench tests, both single and multi-core. For software that is not perfectly parallelized, the Intel part will deliver faster response times and lower latency.

The AMD EPYC 8324P, however, makes a stronger case for heavily threaded, specialized workloads. Despite having fewer wins overall, its victories come in areas that matter for specific enterprise functions. The 18.9% lead in data encryption and the 8% advantage in random string sorting suggest it handles cryptographic and sorting tasks more efficiently. Its 32 cores and 64 threads, combined with a lower TDP of 180 watts versus Intel’s 225 watts, indicate a design optimized for density and power efficiency in scale-out deployments where throughput per watt is critical.

For a general-purpose server requiring balanced performance, the Intel Xeon 6521P’s higher average benchmark score and dominance in standard rendering and math tests make it the data-backed winner. For specialized, efficiency-focused environments with a heavy emphasis on encryption or sorting, the AMD EPYC 8324P is the superior pick.

Specification Differences

The core specifications reveal the fundamental design divide. The Intel Xeon 6521P operates with 24 cores and 48 threads, while the AMD EPYC 8324P doubles the core count to 32 and threads to 64. Clock speeds favor Intel, with a base of 2.60 GHz and boost of 4.10 GHz, compared to AMD’s 2.65 GHz base and 3.00 GHz boost. Thermal design power also differs, with Intel rated at 225 watts and AMD at 180 watts.

Socket compatibility is entirely separate: Intel uses Socket 4710, while AMD uses Socket SP6. The process nodes are both 5 nm, but the physical implementations differ, with Intel using a single 598 mm² die and AMD using four 73 mm² chiplets. Cache configurations are distinct, as detailed earlier. Memory channels and bandwidth show Intel’s advantage in raw throughput. PCIe lane counts also favor Intel, offering 136 lanes versus AMD’s 96. The release dates are nearly 18 months apart, with Intel launching in February 2025 and AMD in September 2023. Finally, the launch MSRPs are $1250 for Intel and $1895 for AMD.

Head-to-Head Benchmarks

The benchmark results show a consistent pattern of Intel dominance in most tests, with AMD carving out specific niches. Starting with Cinebench, the Intel Xeon 6521P wins all six tests by a uniform margin of 16.7%. In Cinebench R23 multi-core, Intel scores 56,658 against AMD’s 48,557, and in single-core, Intel hits 7,998 versus 6,855. This uniformity across R15, R20, and R23 suggests a fundamental per-clock advantage for Intel.

Passmark results are more varied. Intel wins extended instructions by 20.8% (72,820 vs 60,304), floating point math by 28.6% (178,828 vs 139,022), find prime numbers by a massive 61.4% (560 vs 347), physics by 28.8% (5,972 vs 4,637), and multithread by 16.7% (66,657 vs 57,127). The single-thread test shows Intel’s biggest margin at 36.8% (3,238 vs 2,367).

AMD’s wins are fewer but concentrated. In data compression, it narrowly edges out Intel with a score of 980,907 versus 967,721, a 1.3% delta. Data encryption is a more decisive victory for AMD, scoring 63,195 against Intel’s 51,221, an 18.9% advantage. Integer math goes to AMD by a slim 0.9% margin (248,447 vs 246,263). Random string sorting is AMD’s other clear win, with 113,610 versus 104,517, an 8% delta.

Where Each One Wins

The Intel Xeon 6521P is the clear winner in compute-heavy, general-purpose tasks. Its 16.7% lead across all Cinebench versions indicates superior performance in 3D rendering and media creation. The 28.6% advantage in floating-point math and 28.8% in physics simulations make it the better choice for scientific computing and engineering workloads. The 61.4% lead in prime number finding points to advantages in integer-heavy algorithmic tasks, while the 20.8% edge in extended instructions suggests better support for advanced SIMD operations.

The AMD EPYC 8324P wins where specialized data handling is required. Its 18.9% lead in data encryption makes it the preferred option for security-focused applications, VPN gateways, and encrypted storage servers. The 8% advantage in random string sorting indicates superiority in database indexing, log processing, and data deduplication tasks. The narrow wins in data compression and integer math, while small, show that the AMD chip can hold its own in certain throughput-oriented scenarios, potentially due to its higher core count.

Ultimately, the choice hinges on whether the workload is dominated by latency-sensitive, single-threaded tasks (Intel) or by parallel, specialized data operations where core count and efficiency matter more (AMD). The Intel Xeon 6521P is the benchmark leader, but the AMD EPYC 8324P is the specialist.