AMD Ryzen 9 7940HX vs AMD Ryzen Embedded 9900X Comparison

Head-to-Head Benchmarks

The AMD Ryzen 9 7940HX and the AMD Ryzen Embedded 9900X cannot be compared directly through head-to-head benchmark results, as the database contains no overlapping test scores for the two processors. The Ryzen 9 7940HX has an extensive set of 19 recorded benchmark results, while the Ryzen Embedded 9900X currently has no benchmark entries in the database. This absence of a shared benchmark suite means that a traditional score-by-score comparison is not possible from the recorded data.

What the data does show is how the Ryzen 9 7940HX positions itself against other CPUs in the database. Its average benchmark score of 69875 places it at the 94th percentile among all CPUs tracked. The nearest rival is the AMD Ryzen 7 9700F, which scores 69996, a difference of only 0.2% in favor of the Ryzen 7. The Intel Core i7-14700KF sits 0.4% ahead with a score of 70163, while the AMD Ryzen 9 7950X trails the 7940HX by 0.5% with a score of 69515. The Intel Core i7-14700K is 0.7% behind, scoring 69355. These deltas are remarkably tight, indicating that the 7940HX competes in a cluster of high-end performers where fractional percentage points separate the field.

For the Ryzen 9 7940HX's own benchmark runs, the Cinebench R23 multi-core score of 29400 and single-core score of 1807 show a strong balance between all-core throughput and single-thread responsiveness. In 3DMark tests, the processor scales from 1027 in single-thread to 13447 in max-threads, with intermediate scores of 2001 in 2-thread, 3844 in 4-thread, and 7158 in 8-thread tests. The scaling pattern is nearly linear from 2 to 8 threads, which is characteristic of a high-core-count part with efficient thread scheduling. PassMark results reinforce the same picture: integer math at 202883, floating-point math at 121383, and multithread at 53204.

Architecture Differences

The two processors come from different architectural generations and are built for different market segments. The Ryzen 9 7940HX is a mobile part from the 7000 series, using Zen 4 architecture under the Dragon Range codename. The Ryzen Embedded 9900X is a desktop-class embedded processor from the 9000 series, using Zen 5 architecture under the Granite Ridge codename. The generation field in the database confirms this split: the 7940HX is listed as Ryzen 9 (Zen 4 (Dragon Range)), while the 9900X is listed as Ryzen Embedded (Zen 5 (Granite Ridge)).

The manufacturing process differs as well. The 7940HX is built on a 5 nm process at TSMC, while the 9900X uses a 4 nm process, also at TSMC. Transistor counts reflect the newer process and different die configuration: the 7940HX packs 13,140 million transistors across a dual-die layout of 2x 71 mm², whereas the 9900X contains 16,630 million transistors on 2x 70.6 mm² dies. The die sizes are nearly identical, but the 9900X fits roughly 3,490 million more transistors into a similar area, a direct consequence of the denser 4 nm node.

Cache hierarchies also differ per core. The 7940HX provides 64 KB of L1 cache per core and 1 MB of L2 per core, while the 9900X increases L1 to 80 KB per core and keeps L2 at 1 MB per core. Both parts share 64 MB of L3 cache, so the total cache pool is the same, but the larger per-core L1 on the 9900X gives its 12 cores more local scratchpad capacity than the 7940HX offers to its 16 cores.

The memory controllers differ in bandwidth rating. The 7940HX supports DDR5 dual-channel memory with a bandwidth of 83.2 GB/s. The 9900X also uses DDR5 dual-channel memory but is rated at 89.6 GB/s. The 9900X additionally supports ECC memory, a feature that the 7940HX does not include. This is a significant architectural distinction for embedded and reliability-focused workloads.

Where Each One Wins

The Ryzen 9 7940HX wins on core and thread count. With 16 cores and 32 threads against the 9900X's 12 cores and 24 threads, the 7940HX has a 33% advantage in raw parallel thread capacity. For heavily threaded workloads such as rendering, compilation, or scientific simulation, the extra threads give the 7940HX a structural edge, provided the workload can scale across all available cores.

The Ryzen Embedded 9900X wins on clock speed and architectural efficiency. Its base clock of 4.40 GHz is 2.00 GHz higher than the 7940HX's 2.40 GHz base, and its boost clock of 5.60 GHz exceeds the 7940HX's 5.20 GHz boost by 0.40 GHz. Combined with the newer Zen 5 architecture, this gives the 9900X a likely advantage in single-thread and lightly threaded workloads, although no direct benchmark scores exist in the database to confirm the magnitude.

The 9900X also wins on memory bandwidth, with 89.6 GB/s versus 83.2 GB/s for the 7940HX, and on ECC memory support, which the 7940HX lacks. For embedded applications that require data integrity over extended operation, ECC support is a decisive feature. The 9900X further brings more PCIe lanes in its Gen 5 implementation, 24 lanes compared to the 7940HX's 28 lanes? No, the 7940HX actually has 28 lanes, so the 7940HX leads in PCIe lane count. The 9900X still offers Gen 5 connectivity but with fewer lanes.

The 7940HX is in the mobile market segment and draws a 55 W TDP, while the 9900X is a desktop embedded part with a 120 W TDP. The 7940HX's much lower power envelope makes it suitable for high-performance laptops, whereas the 9900X's higher power budget allows sustained clocks in embedded chassis with adequate cooling. The 7940HX has been on the market since January 2024, while the 9900X launched in October 2025, making the latter a newer design by roughly 21 months.

Specification Differences

The two processors differ across nearly every major specification field. The 7940HX has 16 cores and 32 threads; the 9900X has 12 cores and 24 threads. Base clocks are 2.40 GHz for the 7940HX and 4.40 GHz for the 9900X. Boost clocks are 5.20 GHz and 5.60 GHz respectively. TDP is 55 W for the 7940HX and 120 W for the 9900X.

The 7940HX uses AMD Socket FL1, while the 9900X uses AMD Socket AM5. The 7940HX is built on a 5 nm process, the 9900X on 4 nm. Transistor counts are 13,140 million versus 16,630 million. Die sizes are 2x 71 mm² versus 2x 70.6 mm². The L1 cache is 64 KB per core on the 7940HX and 80 KB per core on the 9900X. L2 cache is 1 MB per core on both. L3 cache is 64 MB on both.

Memory bandwidth is 83.2 GB/s for the 7940HX and 89.6 GB/s for the 9900X. ECC memory support is absent on the 7940HX and present on the 9900X. PCIe connectivity is Gen 5 with 28 lanes on the 7940HX and Gen 5 with 24 lanes on the 9900X. The integrated graphics differ: the 7940HX has Radeon 610M, while the 9900X has Radeon Graphics without a specific model designation. The market segment is Mobile for the 7940HX and Desktop for the 9900X. Both are listed as Active in production status, both have unlocked multipliers, and neither has a recorded launch MSRP. The 7940HX carries part number 100-000001486, and the 9900X carries 100-000000662E.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen 9 7940HX has 16 cores and 32 threads, while the AMD Ryzen Embedded 9900X has 12 cores and 24 threads.

Q: What are the clock speed differences between the two?

A: The Ryzen 9 7940HX has a base clock of 2.40 GHz and a boost clock of 5.20 GHz. The Ryzen Embedded 9900X has a base clock of 4.40 GHz and a boost clock of 5.60 GHz.

Q: Does the Ryzen Embedded 9900X support ECC memory?

A: Yes, the Ryzen Embedded 9900X supports ECC memory. The Ryzen 9 7940HX does not support ECC memory.

Q: How do the process nodes compare?

A: The Ryzen 9 7940HX is manufactured on a 5 nm process at TSMC, while the Ryzen Embedded 9900X is manufactured on a 4 nm process, also at TSMC.

Q: What is the TDP of each processor?

A: The Ryzen 9 7940HX has a TDP of 55 W, and the Ryzen Embedded 9900X has a TDP of 120 W.

Q: Which processor has a higher memory bandwidth rating?

A: The Ryzen Embedded 9900X is rated at 89.6 GB/s, which is higher than the Ryzen 9 7940HX's 83.2 GB/s. Both use dual-channel DDR5 memory.