AMD Ryzen 9 7945HX3D vs Intel Xeon 636 Comparison

Head-to-Head Benchmarks

The recorded data presents a clear split between two very different processor designs. The Intel Xeon 636 and AMD Ryzen 9 7945HX3D trade blows across the benchmark suite, but the AMD part claims a decisive 12 wins out of 15 head-to-head comparisons. The Intel chip manages only 3 victories, yet those wins are dramatic and reveal the Xeon's core strength.

The most lopsided result in the entire comparison is in Cinebench R23 single-core. The Intel Xeon 636 scores 5330, which is a massive 175.5% ahead of the AMD Ryzen 9 7945HX3D's 1935. That is not a small margin; it is a generational gap in single-threaded performance. Cinebench R15 single-core tells a similar story, with the Intel part scoring 537 versus 311 for AMD, a 72.7% advantage. These results indicate that the Xeon's Granite Rapids architecture has a substantial per-thread throughput advantage over the Zen 4 chip, likely driven by its higher 4.70 GHz boost clock and newer design.

However, the AMD Ryzen 9 7945HX3D dominates the multi-threaded and compute-heavy workloads. In Cinebench R15 multi-core, the AMD chip scores 5600, beating the Intel Xeon 636's 3805 by 32.1%. This is a significant reversal from the R23 multi-core result, where the Intel part wins 37757 to 32782, a 15.2% margin. The inconsistency between these two Cinebench versions suggests that the AMD chip's 16 cores and 32 threads scale better in certain rendering workloads, while the Intel chip's 12 cores and 24 threads may benefit from different instruction scheduling.

The PassMark suite heavily favors the AMD processor. The most notable blowout is in integer math, where the Ryzen 9 7945HX3D scores 201217 versus 138281 for the Xeon, a 31.3% deficit for Intel. Data encryption shows an even larger gap: AMD scores 42367, which is 35.8% ahead of Intel's 27193. Random string sorting follows the same pattern, with AMD at 83919 and Intel at 54420, a 35.2% difference. Prime number finding is another clear AMD victory, 446 versus 255, a 42.8% margin.

The AMD chip also wins in data compression (699988 vs 550395, 21.4% ahead), extended instructions (52310 vs 43282, 17.3% ahead), floating-point math (121619 vs 107826, 11.3% ahead), and multithreaded PassMark (57476 vs 44421, 22.7% ahead). The physics test goes to AMD as well, 4321 versus 3645, a 15.6% margin. The closest call is in single-threaded PassMark, where AMD edges Intel 4050 to 3937, a narrow 2.8% advantage. That near-tie is surprising given the Xeon's massive Cinebench single-core lead, indicating that PassMark's single-thread workload responds differently to the two architectures.

The Verdict

The data paints a straightforward picture: the AMD Ryzen 9 7945HX3D is the more versatile performer across the broader benchmark suite. It wins 12 of 15 direct comparisons, including all the heavy compute workloads that matter for content creation, data processing, and scientific computing. The AMD chip's 16 cores and 32 threads, combined with its 128 MB of L3 cache and 3D V-Cache slice, deliver superior throughput in integer math, encryption, compression, and floating-point tasks. Its average benchmark score of 59641 places it in the 92nd percentile of all CPUs, and its nearest rivals (Intel Core i9-14900F, AMD Ryzen 9 7945HX, AMD Ryzen 7 8745HX) all sit within 0.8% of its score, meaning it is a highly competitive part in its segment.

The Intel Xeon 636 is not a weak processor by any measure. Its average benchmark score of 61360 is actually higher than the AMD chip's 59641, and it also sits in the 92nd percentile. Its nearest rivals (Intel Core i9-13900T, Intel Core i9-13900K, Intel Core Ultra 7 270HX Plus, Intel Core i9-13900KF) are all within 0.8% of its average score, indicating that the Xeon is a solid performer in its own right. But its wins are concentrated in single-threaded Cinebench tests, where it is untouchable, and in Cinebench R23 multi-core. For anyone running workloads that depend on per-core speed, such as legacy single-threaded applications or lightly threaded simulations, the Xeon is the clear choice.

For users who need maximum parallel throughput across a wide range of tasks, the AMD Ryzen 9 7945HX3D is the better pick. The data shows it is faster in 12 out of 15 benchmarks, and its wins often come with double-digit margins. The Xeon's 3 wins are important, but they are fewer and more specialized. The verdict from the database is simple: choose AMD for general compute and Intel for single-thread dominance.

Where Each One Wins

The Intel Xeon 636 wins in exactly three recorded benchmarks: Cinebench R15 single-core, Cinebench R23 single-core, and Cinebench R23 multi-core. The single-core results are the headline, with the Xeon leading by 72.7% in R15 and 175.5% in R23. These are not marginal victories; they are overwhelming. The R23 multi-core win, 37757 versus 32782, shows that the Xeon can also harness its 12 cores effectively in the right workload, beating the AMD chip's 16 cores by 15.2%. This suggests that the Xeon's Granite Rapids architecture has excellent core efficiency and memory subsystem design, with 48 MB of shared L3 cache and quad-channel DDR5 memory providing 204.8 GB/s of bandwidth.

The AMD Ryzen 9 7945HX3D wins everywhere else. Its 12 victories span the entire PassMark suite, including integer math, floating-point math, data encryption, data compression, extended instructions, prime number finding, random string sorting, physics, multithreaded, and single-threaded tests. It also wins Cinebench R15 multi-core. The most significant wins are in integer math (31.3% ahead), data encryption (35.8% ahead), random string sorting (35.2% ahead), and prime number finding (42.8% ahead). These are the workloads that benefit from the AMD chip's 128 MB of L3 cache, which includes a dedicated 64 MB 3D V-Cache slice. The cache-heavy design excels at data manipulation tasks where working sets fit in the large pool.

The AMD chip's 16 cores and 32 threads also give it a raw throughput advantage in multithreaded PassMark, where it scores 57476 versus 44421. Its 55 W TDP is remarkably low for a 16-core processor, especially compared to the Xeon's 170 W TDP. This means the AMD part achieves its performance at a fraction of the power draw, which is a significant advantage for sustained workloads in mobile or compact systems. The Intel chip, by contrast, demands substantially more power but delivers its single-core wins and that one multi-core Cinebench victory.

FAQ

Q: Which processor has the higher single-core performance in Cinebench R23?

A: The Intel Xeon 636 scores 5330 in Cinebench R23 single-core, which is 175.5% higher than the AMD Ryzen 9 7945HX3D's 1935. This is the largest single-core margin in the entire benchmark comparison.

Q: How does the AMD Ryzen 9 7945HX3D perform in data encryption workloads?

A: The AMD chip scores 42367 in PassMark data encryption, which is 35.8% higher than the Intel Xeon 636's 27193. This represents one of the AMD chip's largest wins.

Q: What is the core and thread configuration difference between the two processors?

A: The Intel Xeon 636 has 12 cores and 24 threads, while the AMD Ryzen 9 7945HX3D has 16 cores and 32 threads. The AMD chip also features a larger 128 MB shared L3 cache with a 64 MB 3D V-Cache slice, compared to the Intel chip's 48 MB shared L3 cache.

Q: Which chip has the higher average benchmark score?

A: The Intel Xeon 636 has an average benchmark score of 61360, which is higher than the AMD Ryzen 9 7945HX3D's 59641. However, both chips are in the 92nd percentile of all CPUs, and the AMD chip wins more individual head-to-head comparisons.

Q: Does the AMD Ryzen 9 7945HX3D win any Cinebench multi-core tests?

A: Yes, the AMD chip wins Cinebench R15 multi-core with a score of 5600, which is 32.1% higher than the Intel Xeon 636's 3805. However, the Intel chip wins Cinebench R23 multi-core with 37757 versus 32782, a 15.2% advantage for Intel.

Q: How close is the single-threaded PassMark result between the two?

A: The AMD Ryzen 9 7945HX3D scores 4050 in PassMark single-threaded, while the Intel Xeon 636 scores 3937. This is a narrow 2.8% margin, making it the closest benchmark result in the entire comparison.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Xeon 636 uses the Granite Rapids architecture, built on a 5 nm process at Intel's own foundry. It has 12 cores and 24 threads, with a base clock of 3.50 GHz and a boost clock of 4.70 GHz. The die size is 598 mm², which is a large chip designed for server and workstation workloads. Its cache hierarchy includes 112 KB of L1 per core, 2 MB of L2 per core, and 48 MB of shared L3 cache. Memory support is DDR5 over a quad-channel bus, providing 204.8 GB/s of bandwidth. ECC memory is supported. The chip uses Intel Socket 4710 and offers Gen 5 PCIe with 80 lanes (CPU only). It has no integrated graphics. The launch MSRP is $639, and the part number is SA2DM. It was released in February 2026.

The AMD Ryzen 9 7945HX3D uses the Zen 4 architecture, codenamed Dragon Range, and is manufactured on a 5 nm process at TSMC. It has 16 cores and 32 threads, with a base clock of 2.30 GHz and a boost clock of 5.40 GHz. The die size is 2x 71 mm², and it packs 17,840 million transistors. Its cache configuration is notably different: 64 KB of L1 per core, 1 MB of L2 per core, and 128 MB of shared L3 cache. That L3 pool includes a dedicated 64 MB 3D V-Cache slice, which is the defining feature of the X3D lineup. Memory support is DDR5 over a dual-channel bus, providing 83.2 GB/s of bandwidth. ECC memory is supported. The chip uses AMD Socket FL1 and offers Gen 5 PCIe with 28 lanes (CPU only). It includes integrated Radeon 610M graphics, which the Intel chip lacks. It was released in July 2023.

The power envelopes are drastically different. The Intel Xeon 636 has a TDP of 170 W, while the AMD Ryzen 9 7945HX3D has a TDP of just 55 W. That is a 115 W difference, meaning the AMD chip delivers its higher core count and larger cache at a fraction of the thermal budget. The Intel chip's higher TDP is consistent with its higher base clock and quad-channel memory controller, which require more power to sustain. The process nodes are both 5 nm, but the foundries differ: Intel uses its own fabs, while AMD uses TSMC. The transistor count for the Intel chip is not recorded in the database, but the AMD chip's 17,840 million transistors across its dual-die design highlights the density of the Zen 4 implementation.

The memory bandwidth figures also tell a story. The Intel chip's quad-channel DDR5 provides 204.8 GB/s, which is more than double the AMD chip's 83.2 GB/s from dual-channel DDR5. This gives the Xeon a significant advantage in memory-bound workloads, which may explain its strong Cinebench R23 multi-core result. However, the AMD chip's 128 MB L3 cache compensates by keeping more data on-die, reducing the need to access system memory. The 3D V-Cache slice is specifically designed to improve cache hit rates for data-heavy tasks, which is reflected in the AMD chip's PassMark wins in encryption, compression, and integer math. Both chips are unlocked for overclocking, and both support ECC memory, but they target different market segments: the Intel chip is a server/workstation part, while the AMD chip is a mobile processor.