AMD Ryzen AI Max 390 vs AMD Ryzen Embedded 9900X Comparison

# Where Each One Wins

The benchmark data available for this comparison is heavily weighted toward the AMD Ryzen AI Max 390, which has a full suite of recorded scores across Cinebench and Passmark tests. The AMD Ryzen Embedded 9900X has no recorded benchmark scores in the database, meaning its performance profile must be inferred from its architectural specifications rather than direct measurements.

The Ryzen AI Max 390 delivers a Cinebench R23 multi-core score of 36,064 and a single-core score of 5,091. In Cinebench R20, it records 15,146 multi-core and 2,138 single-core, while Cinebench R15 shows 3,635 multi-core and 513 single-core. These results place the processor in the 91st percentile among all CPUs tracked in the database, with an average benchmark score of 56,273.

The nearest rivals for the Ryzen AI Max 390 provide context for its standing. The AMD Ryzen AI 9 HX PRO 470 posts an average score of 56,306, which is 0.1% higher than the AI Max 390. The Intel Core i9-14900HX scores 56,004, putting it 0.5% behind. The AMD Ryzen Threadripper PRO 3955WX reaches 56,555, leading by 0.5%, and the Intel Core 7 253PQE trails by 0.6% with a score of 55,919. These margins are narrow, indicating the AI Max 390 sits in a crowded performance band.

Passmark results for the AI Max 390 show specific strengths. The data compression score of 487,145 is the standout figure, while multi-thread performance registers 41,737. Integer math reaches 146,519, floating point math scores 90,594, and extended instructions hit 38,716. Single-thread Passmark performance is 4,028, with random string sorting at 53,113, data encryption at 25,097, and physics at 2,761. The find prime numbers test records 316.

Since the Ryzen Embedded 9900X has zero recorded benchmarks and an average score of 0, it sits in the 50th percentile by default. There is no head-to-head benchmark data between these two processors, and the win count is zero for both. The analysis therefore relies on specification differences to determine where each processor would likely hold an advantage.

# Architecture Differences

The two processors share a common foundation but diverge in key areas. Both use the Zen 5 architecture on TSMC's 4 nm process node, and both have a die size of 2x 70.6 mm². They each feature 12 cores and 24 threads, with an 80 KB L1 cache per core and a 1 MB L2 cache per core. The shared L3 cache is 64 MB on both parts.

Clock speeds differ significantly. The Ryzen AI Max 390 has a base clock of 3.20 GHz and a boost clock of 5.00 GHz. The Ryzen Embedded 9900X starts higher with a 4.40 GHz base clock and reaches 5.60 GHz boost. This gives the Embedded 9900X a 1.20 GHz advantage at base and a 0.60 GHz edge at boost, which would translate to higher single-thread throughput in workloads that scale with clock frequency.

Power envelopes diverge sharply. The AI Max 390 carries a TDP of 55 watts, classifying it as a mobile processor. The Embedded 9900X has a TDP of 120 watts, more than double, reflecting its desktop-oriented design. The higher power budget allows the Embedded part to sustain higher clocks under load.

Memory architecture presents one of the clearest differentiators. The AI Max 390 supports LPDDR5X memory over a quad-channel bus, delivering 256.0 GB/s of memory bandwidth. The Embedded 9900X uses DDR5 over a dual-channel bus, capping bandwidth at 89.6 GB/s. The AI Max 390 offers nearly three times the memory bandwidth, a critical advantage for memory-intensive workloads such as data compression and large dataset processing.

Both processors support ECC memory, but the socket and platform differ. The AI Max 390 uses AMD Socket FP11, a mobile form factor, while the Embedded 9900X uses AMD Socket AM5, the standard desktop platform. PCIe connectivity also diverges: the AI Max 390 provides Gen 4 with 16 CPU lanes, whereas the Embedded 9900X offers Gen 5 with 24 CPU lanes. The newer PCIe standard and higher lane count on the Embedded part benefit systems needing fast storage or expansion cards.

Integrated graphics differ as well. The AI Max 390 pairs with a Radeon 8050S GPU, while the Embedded 9900X uses a generic Radeon Graphics solution. The transistor count is listed only for the Embedded 9900X at 16,630 million. The AI Max 390 has an unlocked multiplier set to false, while the Embedded 9900X is multiplier unlocked, allowing overclocking.

Release timing shows the AI Max 390 launched on January 5, 2025, with the Embedded 9900X following on October 6, 2025. The AI Max 390 is classified as a mobile part under the Ryzen AI Max generation, codenamed Strix Halo. The Embedded 9900X belongs to the 9000 series and the Ryzen Embedded generation, codenamed Granite Ridge.

# The Verdict

The recorded data gives the Ryzen AI Max 390 a clear measured performance profile. Its Cinebench R23 multi-core score of 36,064 and single-core score of 5,091, combined with a 91st percentile ranking and an average benchmark score of 56,273, place it among capable high-end processors. The nearest rival comparisons show it within 0.6% of several competitors, meaning it delivers competitive throughput across the board.

The Ryzen Embedded 9900X lacks any benchmark measurements in the database. Its average score is recorded as 0, and it holds the 50th percentile by default. This absence of data prevents any direct comparison of measured performance. The specification sheet, however, indicates strengths in clock speed and platform flexibility. The 4.40 GHz base clock and 5.60 GHz boost clock exceed the AI Max 390 by a substantial margin, suggesting superior single-thread speed in workloads that do not scale with memory bandwidth.

The choice between these two processors depends on workload characteristics. The AI Max 390's quad-channel LPDDR5X memory at 256.0 GB/s makes it the stronger candidate for tasks that saturate memory bandwidth, such as large-scale data compression, encryption, or scientific computing with sizable working sets. Its 55 watt TDP also makes it suitable for compact or mobile systems where power and thermal limits are tight.

The Embedded 9900X targets a different use case. Its dual-channel DDR5 memory at 89.6 GB/s is a limitation, but the higher clock speeds, Gen 5 PCIe with 24 lanes, and AM5 socket compatibility give it advantages for embedded systems needing expansion capability and raw single-thread performance. The unlocked multiplier adds flexibility for tuning. The 120 watt TDP demands better cooling but enables sustained high-frequency operation.

For users prioritizing measured multi-thread performance and memory bandwidth, the AI Max 390 is the data-backed choice. For those needing higher clocks, PCIe Gen 5 connectivity, or an AM5 platform, the Embedded 9900X offers specification-level advantages, though no benchmark scores confirm its real-world standing.

# FAQ

Q: Which processor has higher clock speeds?

A: The AMD Ryzen Embedded 9900X has a base clock of 4.40 GHz and a boost clock of 5.60 GHz. The AMD Ryzen AI Max 390 has a base clock of 3.20 GHz and a boost clock of 5.00 GHz.

Q: What is the memory bandwidth difference between the two?

A: The Ryzen AI Max 390 supports quad-channel LPDDR5X with 256.0 GB/s bandwidth. The Ryzen Embedded 9900X uses dual-channel DDR5 with 89.6 GB/s bandwidth.

Q: How does the Ryzen AI Max 390 compare to its nearest rivals?

A: The nearest rival is the AMD Ryzen AI 9 HX PRO 470 with an average score of 56,306, which is 0.1% higher. The Intel Core i9-14900HX scores 56,004, 0.5% lower, and the AMD Ryzen Threadripper PRO 3955WX scores 56,555, 0.5% higher.

Q: What are the TDP ratings for each processor?

A: The Ryzen AI Max 390 has a TDP of 55 watts. The Ryzen Embedded 9900X has a TDP of 120 watts.

Q: Do both processors support ECC memory?

A: Yes, both the Ryzen AI Max 390 and the Ryzen Embedded 9900X list ECC memory support as true.

Q: What sockets do these processors use?

A: The Ryzen AI Max 390 uses AMD Socket FP11. The Ryzen Embedded 9900X uses AMD Socket AM5.

# Head-to-Head Benchmarks

The database records no head-to-head benchmark results between the AMD Ryzen AI Max 390 and the AMD Ryzen Embedded 9900X. The win count for both processors is zero. This means all comparative analysis must derive from the AI Max 390's measured scores against its nearest rivals and from the specification differences between the two parts.

For the Ryzen AI Max 390, the strongest recorded results come from Cinebench R23, where the multi-core score of 36,064 reflects substantial parallel throughput from its 12 cores and 24 threads. The single-core score of 5,091 in the same test indicates solid per-thread efficiency. In Cinebench R20, the multi-core score drops to 15,146 and single-core to 2,138, while Cinebench R15 shows 3,635 multi-core and 513 single-core. These results are consistent across generations of the Cinebench suite, showing a processor that scales well with thread count.

Passmark results reinforce this picture. The data compression score of 487,145 is the highest individual figure recorded, suggesting excellent memory subsystem utilization, likely benefiting from the 256.0 GB/s quad-channel LPDDR5X bandwidth. Multi-thread performance of 41,737 and integer math of 146,519 further indicate strong parallel compute capability. Floating point math at 90,594 and extended instructions at 38,716 add to the profile. Single-thread Passmark of 4,028 trails the multi-thread results proportionally, as expected.

The nearest rival comparisons show the AI Max 390 in a tight cluster. The AMD Ryzen AI 9 HX PRO 470 leads by just 0.1%, while the Intel Core i9-14900HX trails by 0.5%. The AMD Ryzen Threadripper PRO 3955WX leads by 0.5%, and the Intel Core 7 253PQE trails by 0.6%. These deltas are small enough that real-world differences would depend heavily on workload and system configuration.

The Ryzen Embedded 9900X cannot be placed in this benchmark hierarchy because no scores exist. Its 50th percentile ranking and average score of 0 are placeholder values, not measurements. The specification sheet indicates it could outperform the AI Max 390 in single-thread scenarios given its 5.60 GHz boost clock versus 5.00 GHz, but this remains unverified by recorded data. Conversely, the AI Max 390's memory bandwidth advantage of 256.0 GB/s versus 89.6 GB/s gives it a theoretical edge in bandwidth-bound tasks, confirmed by its strong data compression score.

Without direct head-to-head measurements, the database cannot assign a definitive winner. The AI Max 390 has a complete benchmark record and a competitive standing among its peers. The Embedded 9900X offers compelling specifications, particularly in clock speed and PCIe connectivity, but lacks any measured performance data to validate its capabilities.