AMD Ryzen 5 40 vs AMD Ryzen Embedded 9900X3D Comparison

Where Each One Wins

The recorded data presents an unusual comparison: the AMD Ryzen 5 40 has a full suite of benchmark results, while the AMD Ryzen Embedded 9900X3D has no recorded benchmark scores in the database. Consequently, the benchmark-derived win tally is 0 for both parts. The Ryzen 5 40, a 4-core, 8-thread Mendocino mobile chip, delivers its strongest results in single-threaded workloads, with a Cinebench R23 single-core score of 1150 and a PassMark single-thread score of 2477. Its multi-core Cinebench R23 score of 4841 and PassMark multithread score of 9341 indicate a modest throughput capability, consistent with its 15 W TDP and mobile market segment.

The Ryzen Embedded 9900X3D, by contrast, has no benchmark entries, so its performance profile cannot be quantified from the database. This absence of data means no direct wins can be assigned to either processor in head-to-head testing. The Ryzen 5 40 does show meaningful strengths in specific PassMark subtests: a floating point math score of 15194, an integer math score of 31598, and a data compression score of 141533. These numbers indicate a capable execution engine for its class, but without corresponding scores for the Embedded 9900X3D, relative positioning is impossible.

The database does provide a percentile ranking for each part. The Ryzen 5 40 sits at the 70th percentile among all CPUs, while the Ryzen Embedded 9900X3D ranks at the 50th percentile. This percentile gap is notable because it is based on average benchmark scores: the Ryzen 5 40 has an average benchmark score of 15882, whereas the Embedded 9900X3D has an average score of 0 due to the absence of recorded tests. The percentile field for the Embedded part likely reflects a default or incomplete ranking rather than measured performance, so it should not be interpreted as evidence that the 4-core mobile chip outperforms the 12-core embedded processor.

Architecture Differences

The two processors belong to entirely different architectural generations and design philosophies. The AMD Ryzen 5 40 uses the Zen 2 architecture, codenamed Mendocino, built on TSMC's 6 nm process node with a die size of 100 mm². It is a monolithic design with 4 cores and 8 threads, base clock of 2.80 GHz, and boost clock of 4.30 GHz. The Ryzen Embedded 9900X3D, part of the 9000 series, uses the Zen 5 architecture, codenamed Granite Ridge, on TSMC's 4 nm process node. It is a chiplet design with two dies, each measuring 70.6 mm², totaling 16,630 million transistors. This part provides 12 cores and 24 threads, with a base clock of 4.40 GHz and a boost clock of 5.50 GHz.

Cache hierarchies differ substantially. The Ryzen 5 40 has 64 KB of L1 cache per core, 512 KB of L2 per core, and 4 MB of shared L3 cache. The Ryzen Embedded 9900X3D has 80 KB of L1 per core, 1 MB of L2 per core, and a much larger 128 MB of L3 cache, reflecting the X3D branding that typically indicates additional stacked cache. The L3 difference, from 4 MB to 128 MB, is the single largest architectural gap between the two parts.

Memory support also diverges. The Ryzen 5 40 uses LPDDR5 memory in a dual-channel configuration, delivering 88.0 GB/s of bandwidth, and does not support ECC memory. The Ryzen Embedded 9900X3D uses DDR5 memory, also dual-channel, with marginally higher bandwidth at 89.6 GB/s, and it does support ECC memory. PCIe connectivity differs as well: the mobile chip provides PCIe Gen 3 with 4 lanes (CPU only), while the embedded chip provides PCIe Gen 5 with 24 lanes (CPU only), a five-generation jump and a sixfold increase in lane count.

The sockets are incompatible. The Ryzen 5 40 uses AMD Socket FT6, a mobile platform, while the Ryzen Embedded 9900X3D uses AMD Socket AM5, a desktop and embedded platform. The TDP ratings reflect their intended usage: 15 W for the mobile Mendocino part versus 120 W for the embedded Granite Ridge part. The Embedded 9900X3D also has an unlocked multiplier, whereas the Ryzen 5 40 does not. Both processors integrate graphics: the Ryzen 5 40 has Radeon 610M, and the Embedded 9900X3D has Radeon Graphics. Production status is Active for both, with release dates close together: September 30, 2025 for the Ryzen 5 40 and October 6, 2025 for the Ryzen Embedded 9900X3D.

The Verdict

The data supports a straightforward selection based on workload requirements. For mobile, power-constrained environments where battery life and thermal limits dominate, the AMD Ryzen 5 40 is the appropriate choice. Its 15 W TDP, LPDDR5 memory support, and compact 100 mm² die make it suited to thin-and-light systems. Its benchmark scores, while modest in absolute terms, place it at the 70th percentile of all CPUs, which indicates respectable performance for its power class. The presence of a measured average benchmark score of 15882 confirms it is a functional, tested part.

For embedded and desktop applications requiring high core counts, large cache, ECC memory, and extensive PCIe connectivity, the AMD Ryzen Embedded 9900X3D is the clear selection from the specification data. It offers 12 cores and 24 threads, a 128 MB L3 cache, PCIe Gen 5 with 24 lanes, ECC support, and a 5.50 GHz boost clock. Its 120 W TDP and AM5 socket indicate a design for systems with active cooling and ample power delivery. The absence of benchmark scores in the database means its measured performance cannot be verified, but the architectural specifications indicate a substantially more capable compute platform.

Neither part is a substitute for the other. The Ryzen 5 40 cannot match the core count, cache capacity, or memory bandwidth of the Embedded 9900X3D. Conversely, the Embedded 9900X3D cannot match the low power draw or mobile form factor of the Ryzen 5 40. The choice is dictated by platform and workload, not by direct performance equivalence.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen Embedded 9900X3D has 12 cores and 24 threads, while the AMD Ryzen 5 40 has 4 cores and 8 threads.

Q: Does the Ryzen 5 40 support ECC memory?

A: No, the Ryzen 5 40 does not support ECC memory. The Ryzen Embedded 9900X3D does support ECC memory.

Q: What is the L3 cache size difference?

A: The Ryzen 5 40 has 4 MB of shared L3 cache, while the Ryzen Embedded 9900X3D has 128 MB of L3 cache.

Q: Are the sockets the same?

A: No, the Ryzen 5 40 uses AMD Socket FT6, and the Ryzen Embedded 9900X3D uses AMD Socket AM5.

Q: Which processor has a higher boost clock?

A: The Ryzen Embedded 9900X3D has a boost clock of 5.50 GHz, compared to 4.30 GHz for the Ryzen 5 40.

Q: What is the memory bandwidth for each?

A: The Ryzen 5 40 provides 88.0 GB/s with LPDDR5 memory, and the Ryzen Embedded 9900X3D provides 89.6 GB/s with DDR5 memory.

Head-to-Head Benchmarks

The head-to-head benchmark comparison is empty in the database, and the Ryzen Embedded 9900X3D has no recorded benchmark scores. Therefore, no direct numerical comparisons can be made between the two processors. The Ryzen 5 40, however, has a complete set of measurements that can be reviewed in isolation. Its Cinebench R23 multi-core score of 4841 and single-core score of 1150 indicate a processor that handles single-threaded tasks more efficiently relative to its multi-threaded capability, a typical pattern for a low-power mobile design. The PassMark multithread score of 9341 versus a single-thread score of 2477 shows a similar ratio.

In integer math, the Ryzen 5 40 scores 31598, while in floating point math it scores 15194. The data compression score of 141533 is notably high compared to the encryption score of 6646, suggesting that the chip's compression engine is well optimized. The extended instructions score of 6437 and the random string sorting score of 15124 round out the PassMark suite. The find prime numbers score of 20 is extremely low, which may reflect the workload's sensitivity to single-core performance or the specific instruction set used. The physics score of 432 is also low in absolute terms.

Because the Embedded 9900X3D has no benchmark data, the database provides no basis for asserting that one part is faster than the other in any specific test. The only comparative context comes from the nearest rivals of the Ryzen 5 40. Its average benchmark score of 15882 is 0.1% higher than the AMD EPYC 75F3 (15859), 0.4% higher than the AMD EPYC 9354P (15826), 0.2% lower than the Intel Core Ultra 5 134U (15910), and 0.4% lower than the AMD EPYC 9334 (15940). These deltas are all within a fraction of a percent, indicating that the Ryzen 5 40 sits in a tightly clustered performance band among those server and mobile parts.

Specification Differences

The following specifications differ between the two processors, based solely on the recorded data:

• Cores: 4 (Ryzen 5 40) versus 12 (Ryzen Embedded 9900X3D)
• Threads: 8 versus 24
• Base clock: 2.80 GHz versus 4.40 GHz
• Boost clock: 4.30 GHz versus 5.50 GHz
• TDP: 15 W versus 120 W
• Socket: AMD Socket FT6 versus AMD Socket AM5
• Architecture: Zen 2 versus Zen 5 (per generation field)
• Codename: Mendocino versus Granite Ridge
• Process node: 6 nm versus 4 nm
• Transistors: not listed versus 16,630 million
• Die size: 100 mm² versus 2x 70.6 mm²
• L1 cache: 64 KB per core versus 80 KB per core
• L2 cache: 512 KB per core versus 1 MB per core
• L3 cache: 4 MB shared versus 128 MB
• Memory support: LPDDR5 versus DDR5
• Memory bandwidth: 88.0 GB/s versus 89.6 GB/s
• ECC memory: false versus true
• PCIe: Gen 3, 4 lanes versus Gen 5, 24 lanes
• Integrated graphics: Radeon 610M versus Radeon Graphics
• Market segment: Mobile versus Desktop
• Multiplier unlocked: false versus true
• Part number: unknown versus 100-000001368E
• Release date: September 30, 2025 versus October 6, 2025

The two share the AMD manufacturer, dual-channel memory bus, TSMC as foundry, Active production status, and integrated graphics capability. All other recorded fields differ.