AMD Ryzen 7 PRO 9755 vs Intel Xeon 638 Comparison

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon 638 has 16 cores and 32 threads, while the AMD Ryzen 7 PRO 9755 has 8 cores and 16 threads. The Intel part doubles the core and thread count of the AMD chip.

Q: How do the two compare in single-thread performance?

A: The AMD Ryzen 7 PRO 9755 wins the single-thread PassMark test with a score of 4606 versus 3670 for the Intel Xeon 638. That is a 20.3% advantage for AMD in that specific workload.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 7 PRO 9755 boosts to 5.40 GHz, while the Intel Xeon 638 boosts to 4.80 GHz. The AMD part also has a higher base clock at 3.80 GHz versus 3.20 GHz.

Q: What is the memory bandwidth difference?

A: The Intel Xeon 638 has a quad-channel memory bus delivering 204.8 GB/s, while the AMD Ryzen 7 PRO 9755 has a dual-channel bus delivering 89.6 GB/s. Intel's memory bandwidth is over twice that of AMD's.

Q: Which processor has a larger L3 cache?

A: The Intel Xeon 638 has 72 MB of shared L3 cache, while the AMD Ryzen 7 PRO 9755 has 32 MB of shared L3 cache. Intel's L3 is more than double that of AMD's.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Xeon 638 and the AMD Ryzen 7 PRO 9755 support ECC memory. Both also support DDR5 memory and PCIe Gen 5.

Architecture Differences

The Intel Xeon 638 is built on the Granite Rapids architecture, a 5 nm process from Intel's own foundry. The die measures 598 mm². It is a server and workstation part on Intel Socket 4710, with 16 cores and 32 threads. The cache layout is notable: 112 KB of L1 per core, 2 MB of L2 per core, and 72 MB of shared L3. The memory subsystem is quad-channel DDR5, with a memory bandwidth of 204.8 GB/s. It has 80 PCIe Gen 5 lanes (CPU only), no integrated graphics, and a TDP of 180 W. The multiplier is unlocked, and the launch MSRP is $899.

The AMD Ryzen 7 PRO 9755 belongs to the 9000 series, built on the Granite Ridge codename with a Zen 5 architecture. It uses TSMC's 4 nm process, with a die size of 70.6 mm² and 8,315 million transistors. The chip has 8 cores and 16 threads on AMD Socket AM5. Cache is smaller across the board: 80 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. Memory is dual-channel DDR5 with 89.6 GB/s bandwidth, and PCIe is Gen 5 with 24 lanes (CPU only). It includes integrated Radeon Graphics and has a TDP of 120 W. The multiplier is locked. This is a notably smaller and more power-efficient design, built on a denser process node.

The architectural split is clear: Intel goes for maximum core count, memory bandwidth, and cache capacity on a large die, while AMD delivers a smaller, lower-power chip with higher clocks and integrated graphics. The process node difference (5 nm versus 4 nm) and foundry difference (Intel versus TSMC) underline the two distinct design philosophies.

Head-to-Head Benchmarks

The recorded PassMark data shows a decisive overall win for the Intel Xeon 638, taking 9 of the 11 benchmark comparisons. The largest margin is in the physics test, where Intel scores 4704 versus AMD's 2257, a 108.4% advantage. That is more than double the performance in that workload.

In floating-point math, Intel scores 144757 against AMD's 81456, a 77.7% lead. In prime number finding, Intel scores 381 versus 197, a 93.4% lead. Data encryption shows Intel at 36030 versus 22577, a 59.6% advantage. Data compression is also strongly in Intel's favor: 725818 versus 467988, a 55.1% lead.

Integer math goes to Intel at 184884 versus 122411, a 51% margin. Random string sorting shows Intel at 74318 versus 49326, a 50.7% lead. Extended instructions are 56498 for Intel versus 38976 for AMD, a 45% edge. The multithread test has Intel at 55651 versus 38721, a 43.7% difference.

The AMD Ryzen 7 PRO 9755 wins only the single-thread tests, which appear twice in the recorded data with identical results: 4606 versus 3670, a 20.3% advantage for AMD in both cases. This is the sole category where the AMD part leads, and it is a substantial lead. There are no close calls in the rest of the suite; Intel's margins range from roughly 44% to over 100%, while AMD's single-thread win is about 20%.

Specification Differences

| Field | Intel Xeon 638 | AMD Ryzen 7 PRO 9755 |

|-------|----------------|----------------------|

| Cores | 16 | 8 |

| Threads | 32 | 16 |

| Base clock | 3.20 GHz | 3.80 GHz |

| Boost clock | 4.80 GHz | 5.40 GHz |

| TDP | 180 W | 120 W |

| Socket | Intel Socket 4710 | AMD Socket AM5 |

| Process node | 5 nm | 4 nm |

| Foundry | Intel | TSMC |

| Die size | 598 mm² | 70.6 mm² |

| L1 cache | 112 KB (per core) | 80 KB (per core) |

| L2 cache | 2 MB (per core) | 1 MB (per core) |

| L3 cache | 72 MB (shared) | 32 MB (shared) |

| Memory bus | Quad-channel | Dual-channel |

| Memory bandwidth | 204.8 GB/s | 89.6 GB/s |

| PCIe lanes | 80 (Gen 5) | 24 (Gen 5) |

| Integrated graphics | N/A | Radeon Graphics |

| Multiplier unlocked | Yes | No |

| Launch MSRP | $899 | Not disclosed |

The two parts differ in nearly every physical and electrical specification. Intel has double the cores, double the threads, more than double the L3 cache, and more than double the memory bandwidth. AMD has higher clocks, a smaller die, a lower TDP, and integrated graphics. The socket and platform targets are entirely separate.

The Verdict

The benchmark data points to a clear performance hierarchy. The Intel Xeon 638 dominates the multi-threaded and compute-heavy workloads, with margins from 43.7% to 108.4% across nine tests. If the workload is parallel, memory-bandwidth sensitive, or cache-heavy, the Intel part is the right choice based on the recorded scores.

The AMD Ryzen 7 PRO 9755 has one specific strength: single-thread performance. Its 20.3% lead in that test is meaningful for lightly threaded applications, and its higher boost clock and lower TDP make it a better fit for scenarios where power draw and per-core speed matter more than raw throughput.

The data shows Intel wins 9 of 11 head-to-head tests, and its average benchmark score of 80723 sits at the 95th percentile of all CPUs. The AMD part also sits at the 95th percentile with an average score of 75738. Both are top-tier parts, but they serve different ends of the workstation spectrum. The Intel Xeon 638 is the higher-throughput processor, while the AMD Ryzen 7 PRO 9755 is the higher-clocked, more efficient option.

Where Each One Wins

The Intel Xeon 638 wins in every multi-threaded and compute-intensive category in the recorded data. This includes data compression, data encryption, extended instructions, prime number finding, floating-point math, integer math, multithread performance, physics simulation, and random string sorting. For rendering, scientific computation, database workloads, and any heavily parallel task, the Intel part is the stronger choice. Its quad-channel memory and 72 MB of L3 cache support these workloads directly. The 55.1% lead in data compression and the 59.6% lead in encryption point to file archiving and secure data handling as particularly strong use cases.

The AMD Ryzen 7 PRO 9755 wins the single-thread tests. For applications that are latency-bound, lightly threaded, or dependent on high per-core clock speeds, the AMD part is the better option. Its 5.40 GHz boost clock and 20.3% single-thread advantage make it suitable for tasks like legacy software, certain scripting workloads, or interactive sessions where one or two cores dominate. The integrated Radeon Graphics also means it can drive a display without a discrete GPU, which is not possible with the Intel part. Its lower TDP of 120 W versus 180 W also makes it the more power-conscious choice for a workstation that runs at high load for long periods.

In short: pick the Intel Xeon 638 for maximum parallel throughput and memory bandwidth, and pick the AMD Ryzen 7 PRO 9755 for single-thread speed, integrated graphics, and lower power draw. The data does not support the AMD part for multi-threaded workloads, where it trails by at least 43.7% in every test it loses.