AMD Ryzen 9 7940HX vs Intel Xeon 6511P Comparison

Intel Xeon 6511P and AMD Ryzen 9 7940HX are both 16-core, 32-thread processors from the same 5nm generation, but they target entirely different segments of the market. The Xeon 6511P is a server/workstation part with a 150W TDP, eight-channel DDR5 memory, and 136 PCIe Gen 5 lanes, while the Ryzen 9 7940HX is a mobile part with a 55W TDP, dual-channel memory, and integrated Radeon 610M graphics. Despite these fundamental differences, benchmark results show a surprisingly competitive split, with the AMD chip winning 8 of 13 head-to-head tests while the Intel chip wins 5, including a dominant single-core victory.

The Verdict

The data presents a clear choice based on workload and platform constraints. For users who need maximum single-thread performance and massive memory bandwidth in a server environment, the Intel Xeon 6511P is the definitive pick. Its Cinebench R23 single-core score of 5815 is more than triple the Ryzen's 1807, a 221.8% advantage that is overwhelming for any single-threaded server task. The Xeon also delivers a 40.1% lead in Cinebench R23 multi-core (41196 vs 29400) and a 103.7% advantage in PassMark physics (4678 vs 2297), making it the stronger choice for rendering and simulation workloads. The Xeon's 409.6 GB/s memory bandwidth versus the Ryzen's 83.2 GB/s further cements its position for data-intensive server applications.

However, for general-purpose compute, especially in mobile or space-constrained environments, the AMD Ryzen 9 7940HX is the better performer. It wins the PassMark multithread test 53204 to 45687 (a 14.1% lead), and its integer math score of 202883 is 19.9% higher than the Xeon's 162524. The Ryzen also dominates in data encryption (41974 vs 31429, a 25.1% lead) and random string sorting (81775 vs 67809, a 17.1% lead). The Ryzen's single-thread PassMark score of 3942 is 35.4% higher than the Xeon's 2545, which is counterintuitive given the Xeon's Cinebench R23 single-core dominance but reflects different benchmark methodologies. The Ryzen's 55W TDP versus the Xeon's 150W TDP makes it the obvious choice for laptops or compact systems where power efficiency is paramount.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Xeon 6511P uses the Granite Rapids architecture, built on Intel's 5nm process, and is part of the Xeon 6 generation. It features 16 cores and 32 threads with a base clock of 2.30 GHz and a boost clock of 4.20 GHz. The cache hierarchy includes 112 KB of L1 per core, 2 MB of L2 per core, and a large 72 MB shared L3 cache. The Xeon supports DDR5 memory across an eight-channel bus, delivering 409.6 GB/s of bandwidth, and supports ECC memory. It offers Gen 5 PCIe with 136 lanes and has no integrated graphics. The chip is socketed for Intel Socket 4710, has a 150W TDP, and was released on February 23, 2025, with a launch MSRP of $815.

The AMD Ryzen 9 7940HX uses the Zen 4 architecture on the Dragon Range codename, manufactured by TSMC on a 5nm process. It also has 16 cores and 32 threads, with a base clock of 2.40 GHz and a boost clock of 5.20 GHz. The cache configuration is smaller: 64 KB L1 per core, 1 MB L2 per core, and 64 MB of L3. Memory support is DDR5 over a dual-channel bus, providing only 83.2 GB/s of bandwidth, and it does not support ECC memory. PCIe is Gen 5 with 28 lanes. It includes integrated Radeon 610M graphics, which the Xeon lacks. The Ryzen uses AMD Socket FL1, has a 55W TDP, and is unlocked for overclocking. It was released on January 16, 2024, and contains 13,140 million transistors across two 71 mm² dies.

Where Each One Wins

Intel Xeon 6511P wins in: Cinebench R23 multi-core (40.1% lead), Cinebench R23 single-core (221.8% lead), PassMark physics (103.7% lead), PassMark floating point math (4.9% lead), and PassMark find prime numbers (12.8% lead). These wins point to strengths in rendering, physics simulation, and floating-point-heavy scientific workloads. The massive single-core Cinebench advantage suggests the Xeon's architecture is highly optimized for certain instruction paths, even if its PassMark single-thread score is lower.

AMD Ryzen 9 7940HX wins in: PassMark multithread (14.1% lead), PassMark integer math (19.9% lead), PassMark data encryption (25.1% lead), PassMark data compression (7.6% lead), PassMark random string sorting (17.1% lead), PassMark extended instructions (0.6% lead), and PassMark single-thread (35.4% lead). The Ryzen's dominance in integer math, encryption, and compression indicates superior performance for general-purpose compute, data processing, and cryptographic workloads. Its higher PassMark single-thread score suggests better overall instruction-level parallelism in everyday tasks.

FAQ

Q: Which processor has better multi-core performance?

A: The Intel Xeon 6511P wins Cinebench R23 multi-core with a score of 41196 versus the AMD Ryzen 9 7940HX's 29400, a 40.1% advantage. However, the Ryzen wins PassMark multithread 53204 to 45687, a 14.1% lead.

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

A: The Intel Xeon 6511P dominates Cinebench R23 single-core with 5815 versus 1807, a 221.8% lead. But the AMD Ryzen 9 7940HX wins PassMark single-thread 3942 to 2545, a 35.4% advantage.

Q: What memory bandwidth do these processors support?

A: The Intel Xeon 6511P supports eight-channel DDR5 with 409.6 GB/s bandwidth. The AMD Ryzen 9 7940HX supports dual-channel DDR5 with 83.2 GB/s bandwidth.

Q: Do these processors have integrated graphics?

A: The AMD Ryzen 9 7940HX includes Radeon 610M integrated graphics. The Intel Xeon 6511P has no integrated graphics (N/A).

Q: Which processor has more PCIe lanes?

A: The Intel Xeon 6511P provides 136 Gen 5 lanes, while the AMD Ryzen 9 7940HX provides 28 Gen 5 lanes.

Q: Are these processors unlocked for overclocking?

A: The AMD Ryzen 9 7940HX has an unlocked multiplier. The Intel Xeon 6511P does not.

Head-to-Head Benchmarks

The most dramatic result in the entire comparison is Cinebench R23 single-core, where the Intel Xeon 6511P scores 5815 against the AMD Ryzen 9 7940HX's 1807. That is a 221.8% difference, and it is the single largest delta in any test. This is a surprising outcome given the Ryzen's higher boost clock of 5.20 GHz versus the Xeon's 4.20 GHz, but the data is unambiguous. The Xeon's architecture clearly executes the R23 single-thread workload far more efficiently. In contrast, the PassMark single-thread test reverses the result, with the Ryzen scoring 3942 to the Xeon's 2545, a 35.4% lead for AMD. This discrepancy highlights how different benchmark suites can produce conflicting pictures of single-thread performance.

In multi-core Cinebench R23, the Xeon maintains its advantage with 41196 versus 29400, a 40.1% lead. This is consistent with the Xeon's server positioning and larger 72 MB L3 cache. However, in PassMark multithread, the Ryzen wins 53204 to 45687, a 14.1% lead. The Ryzen's higher boost clock and smaller cache configuration appear to benefit this particular workload. The PassMark integer math test shows a clear AMD victory: 202883 versus 162524, a 19.9% difference. This is a substantial margin and indicates the Zen 4 architecture handles integer operations more efficiently than Granite Rapids in this benchmark. Conversely, the Xeon wins PassMark physics by a massive 103.7% margin, scoring 4678 to the Ryzen's 2297.

The encryption test favors AMD decisively, with the Ryzen scoring 41974 versus the Xeon's 31429, a 25.1% lead. Data compression also goes to AMD, 693741 to 640808, a 7.6% margin. Random string sorting shows AMD ahead by 17.1% (81775 vs 67809). The extended instructions test is nearly a tie, with AMD winning by just 0.6% (51029 vs 50730). Floating point math goes to Intel by a modest 4.9% (127307 vs 121383), and find prime numbers favors Intel by 12.8% (308 vs 273). Overall, the benchmark data shows a clear pattern: Intel wins in physics, floating point, and the Cinebench suite, while AMD dominates in integer math, encryption, compression, sorting, and the PassMark multithread and single-thread tests. The average benchmark scores confirm the close overall competition, with Intel at 71051 and AMD at 69875, a difference of only about 1.7%.