AMD Ryzen AI 7 345 vs AMD Ryzen Embedded 8840U Comparison

Where Each One Wins

The AMD Ryzen AI 7 345 and the AMD Ryzen Embedded 8840U target different performance profiles despite sharing a socket, a 28 W TDP, and a 4 nm TSMC process. The recorded data shows that the Ryzen AI 7 345 holds a decisive advantage in every measured benchmark category, while the Ryzen Embedded 8840U offers architectural features that the AI 7 345 lacks.

The Ryzen AI 7 345 wins all 15 recorded benchmark tests. In multi-threaded workloads, it scores 11,461 points in Cinebench R23 multi-core, while its single-core score reaches 1,818 points in the same suite. The PassMark suite shows similar dominance: 63,475 in integer math, 42,621 in floating point math, 17,003 in extended instructions, and 23,7484 in data compression. The percentile ranking confirms the gap, with the AI 7 345 sitting at the 81st percentile among all CPUs in the database, compared to the 8840U at the 50th percentile.

However, the Ryzen Embedded 8840U wins on structural grounds. It has 8 cores and 16 threads versus 6 cores and 12 threads on the AI 7 345. Its base clock runs at 3.30 GHz and boost reaches 5.10 GHz, while the AI 7 345 operates at 2.00 GHz base and 4.60 GHz boost. The 8840U also carries 16 MB of shared L3 cache, four times the 4 MB on the AI 7 345. These are not benchmark scores, but they define what each processor can offer in specific deployment scenarios.

The AI 7 345 wins where measured workloads matter. The 8840U wins where raw core count, cache capacity, and ECC memory support matter for embedded reliability requirements. The data does not show a single benchmark victory for the 8840U, because no benchmark scores are recorded for it in the database. Its advantage rests entirely on specification-level differences.

Architecture Differences

The two processors come from different architectural generations. The Ryzen AI 7 345 uses the Krackan Point codename and belongs to the Ryzen AI 300 generation built on Zen 5 and Zen 5c cores. The Ryzen Embedded 8840U uses the Hawk Point codename with Zen 4 architecture, part of the Ryzen Embedded 8000 series.

Both chips are manufactured by TSMC on a 4 nm process node, and both use the AMD Socket FP8. The 8840U has a documented transistor count of 25,000 million and a die size of 178 mm², while the AI 7 345 has no transistor or die size figures recorded.

Cache layouts differ substantially. The AI 7 345 provides 80 KB of L1 per core, 1 MB of L2 per core, and 4 MB of L3. The 8840U provides 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The larger L3 on the 8840U gives it four times the last-level cache, which can matter for workloads with large working sets that repeatedly access shared data.

Memory support differs as well. The AI 7 345 supports DDR5 and LPDDR5X, while the 8840U supports DDR5 only. Both run dual-channel memory with identical 89.6 GB/s bandwidth. The 8840U adds ECC memory support, a feature absent on the AI 7 345. For embedded applications where data integrity is critical, ECC support is a meaningful differentiator.

PCIe connectivity also favors the 8840U. The 8840U provides Gen 4 with 20 lanes from the CPU, while the AI 7 345 provides Gen 4 with 14 lanes. That extra headroom allows the embedded part to attach more peripherals directly to the processor.

Integrated graphics differ as well. The AI 7 345 uses the Radeon 840M, while the 8840U uses the Radeon 780M. The 8840U was released on 2024-04-01, while the AI 7 345 arrived later on 2025-01-14. Both remain in active production, and neither has an unlocked multiplier.

The Verdict

The data points to a clear division of purpose. The Ryzen AI 7 345 is the stronger performer in every recorded benchmark, with a 31-percentile gap over the 8840U in overall CPU ranking. Its Cinebench R23 multi-core score of 11,461 and PassMark single-thread score of 3,875 indicate a processor optimized for mobile computing tasks where per-core efficiency and measured throughput matter.

The Ryzen Embedded 8840U is the appropriate choice for embedded deployments that require ECC memory, more PCIe lanes, a higher base clock, and a much larger L3 cache. Its 8-core, 16-thread configuration offers more parallel hardware threads than the AI 7 345, even if no benchmark scores are recorded to quantify that advantage. The 8840U also has a documented 25,000 million transistors and a 178 mm² die, making it a physically larger and more feature-complete silicon.

For a mobile laptop or a compact AI-capable device where benchmark scores and the 81st percentile ranking are the primary criteria, the Ryzen AI 7 345 delivers the measured performance. For an embedded system that needs ECC memory, 20 PCIe lanes, and a 16 MB shared L3, the Ryzen Embedded 8840U is the part that matches those requirements.

Neither processor has a launch MSRP recorded in the database, so no price-based comparison is possible from the available data.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen Embedded 8840U has 8 cores and 16 threads, while the AMD Ryzen AI 7 345 has 6 cores and 12 threads.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen Embedded 8840U boosts to 5.10 GHz, compared to 4.60 GHz on the AMD Ryzen AI 7 345.

Q: Does either processor support ECC memory?

A: Yes, the AMD Ryzen Embedded 8840U supports ECC memory. The AMD Ryzen AI 7 345 does not.

Q: Which processor has a better recorded benchmark score in Cinebench R23 multi-core?

A: The AMD Ryzen AI 7 345 scores 11,461 points in Cinebench R23 multi-core. The AMD Ryzen Embedded 8840U has no recorded benchmark scores in the database.

Q: What is the difference in L3 cache size?

A: The AMD Ryzen Embedded 8840U has 16 MB of shared L3 cache, while the AMD Ryzen AI 7 345 has 4 MB of L3 cache.

Q: Do both processors use the same socket?

A: Yes, both use AMD Socket FP8.

Q: Which processor has more PCIe lanes?

A: The AMD Ryzen Embedded 8840U provides Gen 4 with 20 CPU lanes, while the AMD Ryzen AI 7 345 provides Gen 4 with 14 CPU lanes.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark comparisons between the two processors. The Ryzen AI 7 345 has 15 individual benchmark scores, while the Ryzen Embedded 8840U has none. This means all performance comparisons must come from the AI 7 345's measured results and the 8840U's specification sheet.

The AI 7 345 delivers a Cinebench R23 multi-core score of 11,461 and a single-core score of 1,818. In Cinebench R15, it scores 1,712 multi-core and 271 single-core. PassMark results show 19,927 in multithread, 3,875 in single-thread, 63,475 in integer math, 42,621 in floating point math, 17,003 in extended instructions, 23,7484 in data compression, 11,814 in data encryption, 25,435 in random string sorting, 1,089 in physics, and 62 in find prime numbers. Its average benchmark score is 29,461.

The nearest rivals to the AI 7 345 in the database provide context for its performance. The AMD Ryzen 7 3800X has an average score of 29,447, which is essentially identical with a 0% delta. The AMD EPYC 9654 scores 29,409, putting the AI 7 345 0.2% ahead. The Intel Core i5-13500HX scores 29,270, with the AI 7 345 ahead by 0.7%. The AMD Ryzen 7 PRO 5755GE scores 29,656, meaning the AI 7 345 trails that part by 0.7%.

These narrow deltas show that the AI 7 345, despite having only 6 cores, lands in the same performance neighborhood as desktop and high-end mobile parts with different configurations. The 81st percentile ranking places it above the median CPU in the database.

The 8840U sits at the 50th percentile with an average benchmark score of 0, because no benchmark data has been recorded. Its 3.30 GHz base clock and 5.10 GHz boost clock are both higher than the AI 7 345's 2.00 GHz base and 4.60 GHz boost, but without measured scores, the practical impact of those clocks cannot be quantified in this database.

Specification Differences

The two processors differ across nearly every specification category.

Core and thread counts: the AI 7 345 has 6 cores and 12 threads; the 8840U has 8 cores and 16 threads.

Clock speeds: the AI 7 345 runs at 2.00 GHz base and 4.60 GHz boost; the 8840U runs at 3.30 GHz base and 5.10 GHz boost.

Cache: the AI 7 345 has 80 KB L1 per core, 1 MB L2 per core, and 4 MB L3; the 8840U has 64 KB L1 per core, 1 MB L2 per core, and 16 MB shared L3.

Memory: the AI 7 345 supports DDR5 and LPDDR5X; the 8840U supports DDR5 only. Both use dual-channel memory with 89.6 GB/s bandwidth.

ECC memory: the AI 7 345 does not support it; the 8840U does.

PCIe: the AI 7 345 provides Gen 4 with 14 lanes; the 8840U provides Gen 4 with 20 lanes.

Integrated graphics: the AI 7 345 uses Radeon 840M; the 8840U uses Radeon 780M.

Architecture: the AI 7 345 is Krackan Point with Zen 5 and Zen 5c cores from the Ryzen AI 300 generation; the 8840U is Hawk Point with Zen 4 cores from the Ryzen Embedded 8000 series.

Process node and foundry: both use 4 nm TSMC.

Socket: both use AMD Socket FP8.

TDP: both are rated at 28 W.

Production status: both are active.

Release date: the 8840U launched on 2024-04-01; the AI 7 345 launched on 2025-01-14.

Transistors and die size: the 8840U has 25,000 million transistors and a 178 mm² die; no figures are recorded for the AI 7 345.

Multiplier: neither processor has an unlocked multiplier.

Market segment: both are classified as mobile.

Part number: the AI 7 345 is listed as 100-000002122; the 8840U part number is unknown.