AMD EPYC 7C13 vs Intel Xeon 678X Comparison

The Intel Xeon 678X and AMD EPYC 7C13 represent two distinct approaches to high-core-count server processing, and the benchmark data shows a decisive overall victory for the Intel part. Across the 16 head-to-head workloads recorded, the Xeon 678X takes 14 wins, with the EPYC 7C13 managing only two. This is not a close contest in aggregate; the Intel processor’s average benchmark score of 193,477 places it in the 99th percentile of all CPUs, while the AMD EPYC 7C13’s average of 167,788 sits in the 98th percentile. The data shows a clear performance hierarchy, though the specific workloads where the AMD chip wins are critical for certain enterprise workloads.

Where Each One Wins

The Intel Xeon 678X is the dominant performer across the vast majority of tested categories, with its advantages ranging from modest to overwhelming. In raw computational throughput, the Xeon leads by a consistent 29.1% margin across all Cinebench versions (R15, R20, and R23) for both single-core and multi-core tests. This consistency suggests a fundamental architectural edge in both frequency scaling and per-core efficiency. The Intel part also wins heavily in floating-point math (35.7% ahead), physics simulation (59.2% ahead), and extended instruction set workloads (66.3% ahead). The largest single victory for the Xeon comes in prime number finding, where it scores 87.4% higher than the EPYC. PassMark single-thread performance also favors Intel by 43.5%, reinforcing its strength in lightly threaded or latency-sensitive tasks.

The AMD EPYC 7C13’s two wins are narrow but meaningful. It leads in data encryption by 27.2%, scoring 114,769 against Intel’s 83,598. This is likely attributable to the EPYC’s higher core count of 64 versus 48, which provides more parallel execution units for cryptographic workloads. It also wins integer math by 17.8%, with a score of 492,554 versus 405,075. These wins indicate that the EPYC’s additional 16 cores can be leveraged effectively in workloads that scale well with core count and do not rely heavily on per-core frequency. For data compression, the Xeon wins by a smaller 8.2% margin, showing that the EPYC’s core advantage can close the gap in memory-bandwidth-sensitive tasks, though not fully overtake Intel.

Architecture Differences

The two processors are built on fundamentally different platforms. The Intel Xeon 678X uses the Granite Rapids architecture on a 5 nm process from Intel’s own foundry, with a die size of 2x 598 mm². It features 48 cores and 96 threads, with a base clock of 2.40 GHz and a boost clock of 4.90 GHz. The cache hierarchy is distinctive: 112 KB of L1 per core, 2 MB of L2 per core, and a large 192 MB of shared L3 cache. Memory support is DDR5 over an eight-channel bus, yielding 409.6 GB/s of bandwidth. It uses Intel Socket 4710 and supports PCIe Gen 5 with 128 lanes from the CPU. The TDP is 300 W, and it is an unlocked multiplier part.

The AMD EPYC 7C13 is a Zen 3 (Milan) part built on a 7 nm process by TSMC, with a transistor count of 33,200 million across 8x 81 mm² chiplets. It offers 64 cores and 128 threads, with a base clock of 2000 MHz (2.00 GHz) and a boost clock of 3.68 GHz. Its cache configuration is different: 64 KB L1 per core, 512 KB L2 per core, and a larger 256 MB of shared L3. Memory support is DDR4 over an eight-channel bus, providing 204.8 GB/s of bandwidth—exactly half of Intel’s memory bandwidth. It uses AMD Socket SP3 and PCIe Gen 4 with 128 lanes. The TDP is lower at 225 W, and the multiplier is locked. The EPYC has no integrated graphics, while the Xeon also lists N/A for integrated graphics.

These differences explain the benchmark outcomes. Intel’s 5 nm process and higher boost clock (4.90 GHz vs 3.68 GHz) drive its massive single-thread and Cinebench wins. The 409.6 GB/s memory bandwidth is double AMD’s, which helps in bandwidth-hungry tasks like data compression and random string sorting. AMD’s larger L3 cache (256 MB vs 192 MB) and higher core count (64 vs 48) provide advantages in integer math and encryption, where parallel throughput matters more than raw frequency.

Head-to-Head Benchmarks

The Cinebench results are the most striking for their uniformity. In Cinebench R15 multi-core, the Xeon scores 8,444 against the EPYC’s 6,539, a 29.1% advantage. The same delta appears in R15 single-core (1,192 vs 923), R20 multi-core (35,185 vs 27,246), R20 single-core (4,967 vs 3,846), and R23 multi-core (83,775 vs 64,873). This exact 29.1% delta across all five Cinebench tests indicates a consistent per-core performance advantage that scales linearly with core count—the Xeon’s 48 cores are simply more efficient than the EPYC’s 64.

The PassMark suite reveals where AMD’s core count pays off. In integer math, the EPYC scores 492,554 versus the Xeon’s 405,075, a 17.8% win for AMD. In data encryption, the EPYC scores 114,769 versus 83,598, a 27.2% win. These are the only two tests where the EPYC prevails, and both involve highly parallelizable integer operations. In contrast, the Xeon dominates floating-point math (362,070 vs 266,846, a 35.7% lead) and extended instructions (141,431 vs 85,034, a 66.3% lead). The physics test shows a 59.2% advantage for Intel (7,809 vs 4,904), and prime number finding shows an 87.4% advantage (1,010 vs 539).

Single-thread performance is a decisive Intel victory: 3,758 versus 2,618, a 43.5% lead. This is the largest gap in the entire dataset after prime numbers. Random string sorting also favors Intel by 24.9% (164,102 vs 131,361), and multithread performance follows the Cinebench pattern with a 29.1% lead (98,559 vs 76,322). Data compression is the closest Intel win, at 8.2% (1,690,896 vs 1,562,251), showing that AMD’s core count can nearly match Intel in this workload but cannot overcome the bandwidth deficit.

The Verdict

The data points to a clear recommendation: the Intel Xeon 678X is the superior processor for the vast majority of server and workstation workloads. It wins 14 of 16 benchmarks, with consistent 29.1% leads in rendering and multithreaded tasks, and even larger margins in physics, extended instructions, and prime number finding. Its 4.90 GHz boost clock and 409.6 GB/s memory bandwidth make it the choice for high-frequency, low-latency, and memory-intensive applications. The launch MSRP is $3749.

The AMD EPYC 7C13 is the specialist choice for two specific domains: data encryption and integer math. Its 64 cores and 256 MB L3 cache provide a 27.2% encryption win and a 17.8% integer math win. If a workload is dominated by cryptographic operations or large integer computations that scale perfectly across many cores, the EPYC’s lower TDP of 225 W (versus Intel’s 300 W) also makes it a more power-efficient option for those tasks. However, for any mixed or general-purpose server load, the Intel part’s 29.1% multithread advantage and 43.5% single-thread advantage make it the default pick. The EPYC’s two wins do not compensate for its losses in every other category, including a 66.3% deficit in extended instructions and a 59.2% deficit in physics.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7C13 has 64 cores and 128 threads, while the Intel Xeon 678X has 48 cores and 96 threads.

Q: What is the memory bandwidth difference?

A: The Intel Xeon 678X provides 409.6 GB/s with eight-channel DDR5, exactly double the AMD EPYC 7C13’s 204.8 GB/s with eight-channel DDR4.

Q: Where does the AMD EPYC 7C13 win over the Intel Xeon 678X?

A: The EPYC wins in only two benchmarks: data encryption (114,769 vs 83,598, a 27.2% lead) and integer math (492,554 vs 405,075, a 17.8% lead).

Q: How large is the Intel Xeon 678X’s single-thread advantage?

A: In PassMark single-thread testing, the Xeon scores 3,758 versus the EPYC’s 2,618, a 43.5% lead. This is one of the largest margins in the dataset.

Q: Which processor has a larger L3 cache?

A: The AMD EPYC 7C13 has 256 MB of shared L3 cache, while the Intel Xeon 678X has 192 MB of shared L3 cache.

Q: What is the average benchmark score for each processor?

A: The Intel Xeon 678X has an average benchmark score of 193,477, compared to the AMD EPYC 7C13’s 167,788. The Xeon also sits in the 99th percentile of all CPUs, while the EPYC is in the 98th.