AMD EPYC 7C13 vs Intel Xeon 6740E Comparison

Intel Xeon 6740E and AMD EPYC 7C13 are both active server/workstation processors, but they represent fundamentally different design philosophies. The Intel part is a 96-core, 96-thread Sierra Forest chip built on Intel’s 5 nm process, while the AMD EPYC 7C13 is a 64-core, 128-thread Zen 3 Milan part on TSMC’s 7 nm node. The head-to-head benchmark data shows a near-tie in Cinebench multi-core tests, with the AMD winning by only 0.2% in each, but the Intel pulls ahead decisively in several specialized Passmark workloads. The AMD counters with a strong single-thread lead. The data shows a mixed bag: 12 benchmark wins for the AMD and 5 for the Intel, but the magnitude of the Intel’s wins in specific areas is often much larger than the AMD’s narrow Cinebench margins.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon 6740E has 96 cores and 96 threads, while the AMD EPYC 7C13 has 64 cores and 128 threads. The AMD uses simultaneous multithreading to double its thread count, whereas the Intel does not.

Q: How do they compare in multi-core rendering benchmarks?

A: They are effectively tied. In Cinebench R23 multi-core, the AMD scores 64873 versus the Intel’s 64741, a 0.2% difference. The same 0.2% margin appears in Cinebench R15 (6539 vs 6525) and R20 (27246 vs 27191), all favoring the AMD.

Q: Which processor is better for single-threaded tasks?

A: The AMD EPYC 7C13 is clearly ahead. In Passmark single-thread, it scores 2618 versus the Intel’s 1997, a 23.7% advantage. The Cinebench R23 single-core scores are much closer, with the AMD at 9158 and the Intel at 9140.

Q: Where does the Intel Xeon 6740E win by the largest margin?

A: The Intel’s biggest win is in Passmark random string sorting, where it scores 220684 against the AMD’s 131361, a 68% advantage. It also leads Passmark physics by 55.1% (7608 vs 4904) and data encryption by 19.5% (137106 vs 114769).

Q: What are the memory support differences?

A: The Intel Xeon 6740E supports DDR5 memory with an eight-channel bus and 409.6 GB/s bandwidth. The AMD EPYC 7C13 uses DDR4 memory on an eight-channel bus with 204.8 GB/s bandwidth. Both support ECC memory.

Q: Which processor has a higher average benchmark score?

A: The Intel Xeon 6740E has an average benchmark score of 187718, while the AMD EPYC 7C13 sits at 167788. The Intel also ranks in the 99th percentile versus all CPUs, compared to the AMD’s 98th percentile.

Where Each One Wins

The AMD EPYC 7C13 dominates the Cinebench suite across the board, but the margins are razor-thin. It wins R15, R20, and R23 in both multi-core and single-core tests, each by exactly 0.2%. This consistency suggests a slight architectural efficiency in rendering workloads, but the difference is within run-to-run noise. In Passmark, the AMD wins integer math (492554 vs 457614, 7.1% ahead), extended instructions (85034 vs 78968, 7.1% ahead), and find prime numbers (539 vs 526, 2.4% ahead). Its single-thread Passmark score of 2618 is a substantial 23.7% higher than the Intel’s 1997, making it the clear pick for lightly threaded workloads.

The Intel Xeon 6740E wins where raw throughput and memory bandwidth matter. Its Passmark physics score of 7608 is 55.1% higher than the AMD’s 4904, and its random string sorting score of 220684 beats the AMD’s 131361 by a massive 68%. Data compression (1786845 vs 1562251) and data encryption (137106 vs 114769) also go to Intel, by 14.4% and 19.5% respectively. Floating-point math is a 15.9% win for Intel (309333 vs 266846). These are workloads that can leverage the Intel’s 96 physical cores and its DDR5 memory bandwidth, which is double that of the AMD system.

Architecture Differences

The Intel Xeon 6740E uses the Sierra Forest architecture, built on Intel’s 5 nm process with a die size of 578 mm². It implements a 96-core, 96-thread design with no hyperthreading, and its cache hierarchy is organized around modules: each core has 96 KB of L1, each module has 4 MB of L2, and there is 96 MB of shared L3 cache. The core count is higher than the AMD’s, but the lack of SMT means it cannot process two threads per core. The platform is Intel Socket 4710, and it supports PCIe Gen 5 with 88 CPU-only lanes.

The AMD EPYC 7C13 is a Zen 3 Milan part fabricated by TSMC on a 7 nm process, with a transistor count of 33,200 million spread across 8 dies of 81 mm² each. It has 64 cores and 128 threads, meaning each core supports two threads via SMT. Its cache structure is different: 64 KB L1 per core, 512 KB L2 per core, and a much larger 256 MB shared L3. It uses AMD Socket SP3 and supports PCIe Gen 4 with 128 CPU-only lanes. The process node is older and larger, but the chiplet design with a massive L3 cache is a distinct architectural choice compared to Intel’s monolithic die.

The memory architectures diverge sharply. Intel uses DDR5 with 409.6 GB/s bandwidth, while AMD uses DDR4 with 204.8 GB/s. This 2x bandwidth advantage for Intel is a key factor in its wins in bandwidth-sensitive tasks like random string sorting and physics. The Intel also has a higher TDP at 250 W versus the AMD’s 225 W, which is unsurprising given the extra cores.

Specification Differences

The two chips differ on nearly every core specification. The Intel Xeon 6740E has 96 cores and 96 threads, while the AMD EPYC 7C13 has 64 cores and 128 threads. Base clocks are 2.40 GHz for Intel and 2000.00 MHz for AMD, but the AMD boosts higher at 3.68 GHz versus Intel’s 3.20 GHz. TDP is 250 W for Intel and 225 W for AMD. The process node is 5 nm (Intel) versus 7 nm (TSMC for AMD). The Intel die is 578 mm², while the AMD uses 8x 81 mm² chiplets. L3 cache is 96 MB for Intel and 256 MB for AMD, which is a significant difference in favor of the AMD. L1 cache is also different: 96 KB per core for Intel versus 64 KB per core for AMD, and L2 is 4 MB per module for Intel versus 512 KB per core for AMD. Memory support is DDR5 for Intel and DDR4 for AMD, with bandwidths of 409.6 GB/s and 204.8 GB/s respectively. PCIe generations and lane counts differ: Gen 5 with 88 lanes for Intel, Gen 4 with 128 lanes for AMD. The Intel has a launch MSRP of $5265 and a release date of 2024-06-02, while the AMD has no listed launch MSRP or release date in the data.

Head-to-Head Benchmarks

The Cinebench results are a dead heat. The AMD wins R15 multi-core with 6539 versus 6525, R20 with 27246 versus 27191, and R23 with 64873 versus 64741. Single-core results are similarly tight: R15 at 923 vs 921, R20 at 3846 vs 3838, and R23 at 9158 vs 9140. Every single one of these is a 0.2% margin. This indicates that for pure rendering workloads, the 96-core Intel and 64-core AMD with SMT deliver nearly identical throughput, within the margin of error.

The Intel’s wins are far more decisive. In Passmark physics, the Intel scores 7608 against the AMD’s 4904, a 55.1% gap. This is a massive difference, suggesting the Intel’s physical core count and memory bandwidth are better suited for simulation physics. Random string sorting sees the Intel at 220684 versus 131361, a 68% lead. This workload is heavily memory-bound, and the Intel’s 409.6 GB/s DDR5 bandwidth is likely the key factor. Data encryption is 19.5% better on Intel (137106 vs 114769), and data compression is 14.4% better (1786845 vs 1562251). Floating-point math also favors Intel by 15.9% (309333 vs 266846).

The AMD counters with strong Passmark scores. Integer math is 7.1% higher (492554 vs 457614), extended instructions are 7.1% higher (85034 vs 78968), and find prime numbers is 2.4% higher (539 vs 526). The single-thread score of 2618 versus 1997 is the most lopsided result in the entire comparison, a 23.7% advantage for AMD. The multithread score is nearly identical, with the AMD at 76322 and the Intel at 76167, a 0.2% difference.

The Verdict

The data supports a clear split based on workload type. If the workload is heavily single-threaded or relies on integer math and extended instruction sets, the AMD EPYC 7C13 is the correct choice. Its 23.7% lead in Passmark single-thread and 7.1% leads in integer math and extended instructions make it the better pick for database queries, legacy applications, or any software that doesn’t scale across many cores.

If the workload is memory-bandwidth intensive or involves physics, encryption, or data compression, the Intel Xeon 6740E is the stronger option. The 68% lead in random string sorting and 55.1% lead in physics are not marginal differences; they represent a generational leap in specific server tasks. The Intel’s 96 physical cores and DDR5 bandwidth give it a decisive edge in these areas, despite the AMD’s higher boost clock and larger L3 cache. The Intel also has a higher average benchmark score (187718 vs 167788) and a 99th percentile ranking versus the AMD’s 98th.

For a general-purpose server where Cinebench-style multi-threaded rendering is the primary job, the two are statistically identical, and other factors like platform cost or PCIe lane count should decide. The AMD offers more PCIe lanes (128 Gen 4 vs 88 Gen 5), while the Intel offers newer, faster PCIe Gen 5. The AMD has a lower TDP (225 W vs 250 W) and a much larger L3 cache (256 MB vs 96 MB), which could benefit certain cache-sensitive workloads. The Intel has a launch MSRP of $5265, but the AMD’s price is not listed. Ultimately, the Intel wins on raw throughput in specialized tasks, while the AMD wins on single-thread speed and integer performance.