AMD Ryzen 9 PRO 9965X3D vs Intel Xeon 6740E Comparison

Intel Xeon 6740E and AMD Ryzen 9 PRO 9965X3D represent two radically different approaches to high-end computing. The former is a 96-core server behemoth built for scale-out workloads, while the latter is a 16-core workstation-class processor emphasizing raw single-thread speed and density. The benchmark database reveals a clear split: the Intel part dominates in aggregate throughput, while the AMD part wins decisively in single-thread tasks.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon 6740E has 96 cores and 96 threads, while the AMD Ryzen 9 PRO 9965X3D has 16 cores and 32 threads. The Intel part also has a higher core count in every comparison category, though it lacks simultaneous multithreading.

Q: How do their average benchmark scores compare?

A: The Intel Xeon 6740E has an average benchmark score of 187,718, placing it in the 99th percentile of all CPUs. The AMD Ryzen 9 PRO 9965X3D has an average score of 143,735, placing it in the 98th percentile. The Intel part is roughly 30.6% ahead in this aggregate metric.

Q: What is the biggest single-thread performance gap?

A: In the passmark_single_thread test, the AMD Ryzen 9 PRO 9965X3D scores 4,614 versus the Intel Xeon 6740E's 1,997. That is a delta of -56.7% from the Intel side, meaning the AMD part is over 2.3 times faster in this specific test.

Q: Which processor wins in data encryption workloads?

A: The Intel Xeon 6740E wins decisively, scoring 137,106 in passmark_data_encryption versus 43,905 for the AMD part. That represents a 212.3% advantage for Intel, the largest margin in the entire head-to-head set.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Xeon 6740E and the AMD Ryzen 9 PRO 9965X3D support ECC memory. They also both support DDR5, though the Intel part uses an eight-channel memory bus while the AMD part uses dual-channel.

Q: What is the difference in their manufacturing nodes?

A: The Intel Xeon 6740E is built on a 5 nm process by Intel, while the AMD Ryzen 9 PRO 9965X3D uses TSMC's 4 nm process. The AMD part has a smaller node, which typically allows for higher clock speeds at lower power.

Architecture Differences

The foundational difference lies in core philosophy. The Intel Xeon 6740E, codenamed Sierra Forest, uses a "Sierra Forest" architecture with 96 efficiency-oriented cores operating without hyperthreading. Each core has 96 KB of L1 cache and each module shares 4 MB of L2 cache, while the total L3 cache is 96 MB shared. The AMD Ryzen 9 PRO 9965X3D, codenamed Granite Ridge and based on Zen 5, uses 16 high-performance cores with 32 threads. Its L1 cache is 80 KB per core, L2 is 1 MB per core, and L3 is 128 MB total, a notably larger last-level cache per core.

The physical layout differs substantially. The Intel chip has a die size of 578 mm², while the AMD processor uses two chiplets, each 70.6 mm², totaling roughly 141 mm² of silicon. The AMD part also lists 16,630 million transistors, a figure not provided for Intel. The Intel Xeon 6740E is built on Intel's 5 nm process, while the AMD part uses TSMC's 4 nm process, giving the latter a slight density advantage.

Memory architecture reinforces the split. The Intel Xeon 6740E supports eight-channel DDR5 with a memory bandwidth of 409.6 GB/s. The AMD Ryzen 9 PRO 9965X3D supports dual-channel DDR5 with 89.6 GB/s bandwidth. That is a 4.6 times difference in theoretical memory throughput, which directly impacts workloads that stream large datasets. PCIe lanes also differ: Intel provides Gen 5 with 88 lanes (CPU only), while AMD provides Gen 5 with 24 lanes (CPU only). The Intel part has no integrated graphics, whereas the AMD part includes Radeon Graphics.

The clock speeds tell the opposite story. The Intel Xeon 6740E has a base clock of 2.40 GHz and a boost clock of 3.20 GHz, while the AMD Ryzen 9 PRO 9965X3D has a base clock of 4.30 GHz and a boost clock of 5.50 GHz. That 2.3 GHz boost advantage for AMD is the primary driver of its single-thread wins. The AMD part also has a lower TDP of 170 watts versus Intel's 250 watts, despite the higher clocks, likely due to the smaller node and lower core count.

Head-to-Head Benchmarks

The recorded data shows the Intel Xeon 6740E winning 8 of the 11 head-to-head tests. The largest margins come in data encryption and random string sorting. In passmark_data_encryption, Intel scores 137,106 against AMD's 43,905, a delta of 212.3%. In passmark_random_string_sorting, Intel scores 220,684 against 92,886, a delta of 137.6%. Both tests are heavily memory-latency and bandwidth sensitive, where Intel's eight-channel memory controller and massive core count provide a structural advantage.

The Intel part also dominates in floating-point and integer math. In passmark_floating_point_math, Intel scores 309,333 versus 157,123, a 96.9% delta. In passmark_integer_math, Intel scores 457,614 versus 237,955, a 92.3% delta. These results indicate that for raw computational throughput across many parallel threads, the 96-core Intel design is nearly twice as productive as the 16-core AMD design.

In passmark_data_compression, Intel scores 1,786,845 versus 895,563, a 99.5% delta. This test rewards both core count and memory bandwidth, and Intel wins by nearly double. The physics test also favors Intel, with a score of 7,608 versus 4,801, a 58.5% delta. In multithread performance, Intel scores 76,167 versus 68,225, an 11.6% delta, which is closer but still a clear Intel win. Extended instructions show Intel at 78,968 versus 70,797, an 11.5% delta.

The AMD Ryzen 9 PRO 9965X3D wins only three tests, but one of them is decisive. In passmark_single_thread, AMD scores 4,614 against Intel's 1,997, a delta of -56.7% from Intel's perspective. That is a 2.3 times advantage for AMD, directly reflecting its 5.50 GHz boost clock versus Intel's 3.20 GHz. The same delta appears in the duplicate passmark_singlethread test. AMD also wins in passmark_find_prime_numbers, scoring 599 versus 526, a 12.2% delta. This test is typically latency-sensitive and benefits from AMD's high clocks and large L3 cache.

Specification Differences

The two processors differ in nearly every core specification. The Intel Xeon 6740E has 96 cores and 96 threads, while the AMD Ryzen 9 PRO 9965X3D has 16 cores and 32 threads. Base clocks are 2.40 GHz versus 4.30 GHz, and boost clocks are 3.20 GHz versus 5.50 GHz. TDP is 250 watts for Intel and 170 watts for AMD.

The cache hierarchy diverges sharply. Intel uses 96 KB L1 per core, 4 MB L2 per module, and 96 MB shared L3. AMD uses 80 KB L1 per core, 1 MB L2 per core, and 128 MB L3. The total L3 is larger on AMD, and the per-core L2 is also larger, suggesting a design tuned for single-thread data locality.

Memory channels differ: Intel has eight-channel DDR5 with 409.6 GB/s bandwidth, while AMD has dual-channel DDR5 with 89.6 GB/s. PCIe lanes are 88 for Intel and 24 for AMD, both Gen 5. The Intel part has no integrated graphics, while AMD includes Radeon Graphics. Sockets are entirely different: Intel Socket 4710 versus AMD Socket AM5. The manufacturing process is 5 nm for Intel and 4 nm for AMD, with different foundries (Intel vs TSMC). The Intel die is 578 mm², while AMD uses two 70.6 mm² chiplets. Release dates differ, with Intel launching on 2024-06-02 and AMD on 2026-06-29. The Intel part has a launch MSRP of $5265; the AMD part has no recorded launch MSRP.

Where Each One Wins

The Intel Xeon 6740E is the clear choice for throughput-bound, memory-heavy server workloads. Its 96 cores and 409.6 GB/s of memory bandwidth make it dominant in data compression, encryption, floating-point math, and integer math. The 212.3% lead in encryption and the 137.6% lead in random string sorting indicate that any workload involving bulk data transformation or cryptographic processing will see massive gains on the Intel part. The 99.5% lead in data compression reinforces this pattern. For virtualized environments, large database instances, or scientific simulation running many parallel threads, the Intel Xeon 6740E's 8 out of 11 benchmark wins make it the default choice.

The AMD Ryzen 9 PRO 9965X3D wins where latency and clock speed matter more than core count. Its 5.50 GHz boost clock delivers a 2.3 times advantage in single-thread tests, and its 128 MB L3 cache helps in find_prime_numbers, where it leads by 12.2%. This makes it suitable for frontend-heavy applications, real-time control systems, or any software that is poorly parallelized and relies on per-thread performance. The lower 170 watt TDP also means it can be deployed in more compact systems, and its integrated Radeon Graphics provides a display output without a separate GPU. The dual-channel memory bus is a limitation, but for single-thread-bound tasks it is not the bottleneck.

The Verdict

The data points to a clear separation of roles. The Intel Xeon 6740E is a server/workstation processor built for scale: it wins 8 of 11 head-to-head tests, including all the major throughput metrics, and holds a 30.6% average benchmark score advantage over the AMD part. Its 96 cores and eight-channel memory make it the superior choice for data centers, cloud infrastructure, and high-performance computing where parallel workloads dominate. The 99th percentile ranking and the fact that its nearest rivals are other server-class parts, such as the AMD EPYC 8534P and Intel Xeon 678X, confirm its positioning.

The AMD Ryzen 9 PRO 9965X3D is a different tool. It wins only 3 of 11 tests, but those wins are in single-thread performance and prime number finding, where its 5.50 GHz boost clock and 128 MB L3 cache shine. The 2.3 times single-thread advantage makes it the better choice for latency-sensitive, lightly threaded applications. Its 98th percentile ranking and rivals like the Intel Xeon w9-3575X place it in a workstation bracket, but its 16 cores and dual-channel memory limit its appeal for heavy parallel computing. If the workload is a single-threaded bottleneck, the AMD part is faster; if the workload can use dozens of cores, the Intel part is overwhelmingly faster. The database suggests no single winner, only the right tool for the right job.