AMD Ryzen 9 PRO 9945 vs Intel Xeon w7-3565X Comparison

FAQ

Q: Which processor wins the majority of the head-to-head benchmark comparisons?

A: The Intel Xeon w7-3565X wins 9 of the 11 recorded head-to-head tests, while the AMD Ryzen 9 PRO 9945 wins the remaining 2. The Intel part dominates in multi-threaded and throughput-oriented workloads, while the AMD part takes the single-thread tests.

Q: How do the two processors rank against all CPUs in the database?

A: The Intel Xeon w7-3565X sits in the 97th percentile of all CPUs, while the AMD Ryzen 9 PRO 9945 sits in the 96th percentile. Despite the Intel part having a higher average benchmark score, both are near the top of the database.

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

A: The Intel Xeon w7-3565X has an average benchmark score of 118307, while the AMD Ryzen 9 PRO 9945 has an average benchmark score of 96083. This places the Intel part roughly 23% higher in average score.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 PRO 9945 has a boost clock of 5.40 GHz, which is higher than the Intel Xeon w7-3565X's boost clock of 4.80 GHz. The AMD part also has a higher base clock at 3.40 GHz versus 2.50 GHz.

Q: What are the core and thread counts for each processor?

A: The Intel Xeon w7-3565X has 32 cores and 64 threads, while the AMD Ryzen 9 PRO 9945 has 12 cores and 24 threads. The Intel part has more than double the core count and nearly triple the thread count.

Q: Which processor has a higher single-thread score?

A: The AMD Ryzen 9 PRO 9945 records a single-thread score of 4619, which is 26.2% higher than the Intel Xeon w7-3565X's score of 3407. This is the largest margin of victory for the AMD part in any recorded test.

The Verdict

The data presents a clear split: the Intel Xeon w7-3565X is the choice for heavily threaded, compute-intensive workloads, while the AMD Ryzen 9 PRO 9945 is the choice for single-threaded responsiveness and lower power envelopes. The Intel part wins 9 of 11 head-to-head tests, including all multi-core and math-heavy benchmarks. Its wins range from a modest 16.4% in prime number finding to a commanding 103.8% in floating point math. The AMD part wins only the two single-thread tests, but by a significant 26.2% margin.

For users running workloads that scale across many cores, such as rendering, compression, encryption, or physics simulations, the Intel Xeon w7-3565X is the stronger pick. Its 32 cores, 64 threads, and 82.5 MB of L3 cache give it a substantial throughput advantage. The AMD Ryzen 9 PRO 9945, with its 12 cores and 24 threads, is better suited for tasks that favor high clock speeds and per-core performance, or for systems where a 65 W TDP is preferred over the Intel part's 335 W TDP.

The database's nearest rival data reinforces this positioning. The Intel Xeon w7-3565X sits close to other high-end server parts: it is 1.6% above the AMD EPYC 9255, 1.9% above the Intel Xeon 658X, and 2.7% above the Intel Xeon 6527P, while trailing the AMD EPYC 9384X by 1.8%. The AMD Ryzen 9 PRO 9945 is tightly grouped with workstation-class chips: it is 0.3% above the AMD EPYC 4565P, 0.5% above the AMD EPYC 9175F, and 0.9% above the AMD EPYC 4564P, while trailing the AMD Ryzen 9 9955HX3D by 1.4%. Neither chip is an outlier in its class; both are competitive within their respective segments.

Head-to-Head Benchmarks

The Intel Xeon w7-3565X dominates the recorded head-to-head results. In floating point math, it scores 218720 versus 107340, a 103.8% advantage, the largest single margin in the comparison. Data compression shows a similar story: 1075602 versus 579972, an 85.5% lead. Extended instructions follow at 93.5% ahead (85856 versus 44374), and random string sorting is 77.5% ahead (110848 versus 62458). Data encryption is 79.6% ahead (54676 versus 30450), and integer math is 63.1% ahead (279202 versus 171175). Multi-thread performance is 45.2% ahead (70642 versus 48664), and physics is 46.6% ahead (4254 versus 2902). Even the closest Intel win, find prime numbers, shows a 16.4% advantage (398 versus 342).

The AMD Ryzen 9 PRO 9945 wins both single-thread tests with a score of 4619 versus 3407, a 26.2% margin. This is the only category where the AMD part leads, but the margin is substantial. The single-thread result is particularly notable because it is the only test where the AMD part is not merely competitive but clearly superior.

The overall pattern is consistent: the Intel part wins every throughput-oriented test by large margins, while the AMD part wins the latency-sensitive single-thread test by a large margin. There are no close calls in the head-to-head results; every test is decided by at least 16.4%, and most are decided by more than 45%.

Specification Differences

The two processors differ in nearly every major specification. The Intel Xeon w7-3565X has 32 cores and 64 threads, while the AMD Ryzen 9 PRO 9945 has 12 cores and 24 threads. The Intel part has a base clock of 2.50 GHz and a boost clock of 4.80 GHz; the AMD part has a base clock of 3.40 GHz and a boost clock of 5.40 GHz. The Intel part has a TDP of 335 W, while the AMD part has a TDP of 65 W.

The memory systems differ significantly. The Intel part uses an eight-channel memory bus with a bandwidth of 307.2 GB/s, while the AMD part uses a dual-channel bus with a bandwidth of 89.6 GB/s. Both support DDR5 and ECC memory. The PCIe configurations also differ: the Intel part offers Gen 5 with 112 lanes (CPU only), while the AMD part offers Gen 5 with 24 lanes (CPU only).

The Intel part has an L2 cache of 2 MB per core and an L3 cache of 82.5 MB. The AMD part has an L2 cache of 1 MB per core and an L3 cache of 64 MB. Both have 80 KB of L1 cache per core. The Intel part has no integrated graphics, while the AMD part includes Radeon Graphics. The Intel part is an unlocked multiplier, while the AMD part is locked. The Intel part uses Socket 4677, while the AMD part uses Socket AM5.

Architecture Differences

The Intel Xeon w7-3565X is built on Intel's Sapphire Rapids architecture and is manufactured on a 10 nm process at Intel's own foundry. Its die consists of 4x 477 mm² tiles, and it belongs to the Xeon W generation. The AMD Ryzen 9 PRO 9945 is built on AMD's Granite Ridge architecture, featuring Zen 5 cores, and is manufactured on a 4 nm process at TSMC. It uses 2x 70.6 mm² dies and has 16,630 million transistors. The AMD part belongs to the Ryzen 9 series and the 9000 series generation.

The cache hierarchies differ in both size and allocation. The Intel part has 2 MB of L2 per core and 82.5 MB of L3, while the AMD part has 1 MB of L2 per core and 64 MB of L3. The Intel part's larger L3 cache, combined with its higher core count, contributes to its strong multi-threaded performance. The AMD part's smaller per-core L2 is offset by its higher clock speeds, which help explain its single-thread advantage.

The process node difference is notable: Intel uses a 10 nm process, while AMD uses a 4 nm process from TSMC. The AMD part's smaller process node and lower TDP of 65 W, versus 335 W for the Intel part, indicate a significantly more power-efficient design. The Intel part compensates with a much larger memory bus and more PCIe lanes, making it a more expandable platform.

The release dates also differ: the Intel Xeon w7-3565X was released in August 2024, while the AMD Ryzen 9 PRO 9945 was released in September 2025. Both are listed as Active in production status, and both target the Server/Workstation market segment. The Intel part has a launch MSRP of $2689.

Where Each One Wins

The Intel Xeon w7-3565X wins in every multi-threaded and throughput-oriented category. Its largest wins are in floating point math (103.8% ahead), extended instructions (93.5% ahead), and data compression (85.5% ahead). It also leads in data encryption (79.6%), random string sorting (77.5%), integer math (63.1%), physics (46.6%), multi-thread performance (45.2%), and prime number finding (16.4%). These results make it the clear choice for workloads such as scientific computing, data compression, encryption, rendering, and any task that scales across many cores. Its eight-channel memory bus and 112 PCIe lanes also make it a more capable platform for memory-intensive and expansion-heavy server or workstation builds.

The AMD Ryzen 9 PRO 9945 wins the single-thread tests by 26.2% (4619 versus 3407). This is its only area of victory, but it is a decisive one. The AMD part's higher base clock (3.40 GHz versus 2.50 GHz) and boost clock (5.40 GHz versus 4.80 GHz) support this result. For workloads that are primarily single-threaded, such as certain legacy applications, lightly threaded design tools, or tasks where per-core latency matters more than total throughput, the AMD part is the better option. Its 65 W TDP also makes it a more power-efficient choice for systems where cooling and power budgets are limited. The inclusion of integrated Radeon Graphics is an additional advantage for systems that do not require a discrete GPU.

In summary, the Intel Xeon w7-3565X is the winner for multi-core performance and platform expandability, while the AMD Ryzen 9 PRO 9945 is the winner for single-thread performance and power efficiency. The choice between them depends on whether the workload favors raw throughput or per-core speed.