AMD Ryzen 9 7940HX vs AMD Ryzen AI 7 345 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall victory for the AMD Ryzen 9 7940HX, which wins 12 of the 13 shared benchmark comparisons. The largest margin comes in passmark find prime numbers, where the 7940HX scores 273 against 62 for the Ryzen AI 7 345, a lead of 340.3%. That result highlights the substantial advantage in raw integer throughput that the 16-core, 32-thread Dragon Range processor brings to the table.

Multi-threaded workloads are the clearest separation point. In Cinebench R23 multicore, the 7940HX records 29400 points versus 11461 for the Ryzen AI 7 345, a 156.5% advantage. PassMark multithread shows a similar pattern: 53204 against 19927, a 167% gap. The Ryzen 9 also dominates in passmark integer math at 202883 versus 63475, a 219.6% difference, and in passmark floating point math at 121383 versus 42621, a 184.8% difference. These results align with the core count and thread count disparity between the two processors.

Data-focused tasks reinforce the same conclusion. Passmark data compression sees the 7940HX at 693741 versus 237484, a 192.1% margin. Passmark data encryption is even more lopsided: 41974 against 11814, a 255.3% lead. Extended instruction workloads also favor the larger chip, with passmark extended instructions scoring 51029 versus 17003, a 200.1% difference. Random string sorting, another memory-heavy test, shows 81775 versus 25435, a 221.5% margin.

The Ryzen AI 7 345 takes exactly one victory: Cinebench R23 singlecore, where it scores 1818 against 1807 for the 7940HX. That is a narrow 0.6% difference, but it is a real win for the newer Zen 5 architecture. The gap is small enough that the result could be considered a statistical tie in practical terms, but the recorded data lists the Ryzen AI 7 345 as the winner.

In the remaining single-thread tests, the 7940HX actually holds a slight edge. Passmark single thread shows 3942 versus 3875, a 1.7% advantage. The same result appears for passmark singlethread, also 3942 versus 3875. These numbers suggest that the older Zen 4 design still manages competitive single-thread performance, despite the architectural refresh on the Ryzen AI side.

The overall average benchmark score tells the same story. The 7940HX sits at 69875, while the Ryzen AI 7 345 records 29461. That places the 7940HX in the 94th percentile of all CPUs, versus the 81st percentile for the Ryzen AI 7 345. The nearest rivals for the 7940HX include the Intel Core i7-14700KF at 70163 with a 0.4% delta and the AMD Ryzen 9 7950X at 69515 with a 0.5% delta. The Ryzen AI 7 345 sits near the AMD Ryzen 7 3800X at 29447 with a 0% delta and the Intel Core i5-13500HX at 29270 with a 0.7% delta.

FAQ

Q: Which processor wins in Cinebench R23 multicore?

A: The AMD Ryzen 9 7940HX wins by a wide margin, scoring 29400 against 11461 for the Ryzen AI 7 345, a 156.5% advantage.

Q: Does the Ryzen AI 7 345 win any benchmark at all?

A: Yes. It wins Cinebench R23 singlecore with 1818 points versus 1807 for the 7940HX, a 0.6% difference. The 7940HX wins every other shared test.

Q: How do the processors compare in single-thread PassMark performance?

A: The 7940HX records 3942 in passmark single thread, while the Ryzen AI 7 345 records 3875. That gives the 7940HX a 1.7% lead.

Q: What is the percentile ranking for each CPU?

A: The 7940HX ranks in the 94th percentile of all CPUs, while the Ryzen AI 7 345 ranks in the 81st percentile.

Q: Which processor has more cores and threads?

A: The 7940HX has 16 cores and 32 threads. The Ryzen AI 7 345 has 6 cores and 12 threads.

Q: What is the largest benchmark margin between the two?

A: The largest margin is in passmark find prime numbers, where the 7940HX scores 273 versus 62 for the Ryzen AI 7 345, a 340.3% lead.

Where Each One Wins

The AMD Ryzen 9 7940HX is the clear choice for heavily threaded workloads. Its 32 threads deliver massive leads across Cinebench R23 multicore, PassMark multithread, integer math, floating point math, and data compression. For example, passmark data compression shows a 192.1% advantage, and passmark integer math shows a 219.6% advantage. Any task that scales with core count, such as video rendering, scientific simulation, or batch data processing, will favor the 7940HX by a very large margin. The 16-core design with 32 threads is simply in a different performance class than the 6-core, 12-thread Ryzen AI 7 345.

Encryption and extended instruction workloads also strongly favor the 7940HX. Passmark data encryption shows a 255.3% lead, and passmark extended instructions shows a 200.1% lead. These results indicate that the 7940HX is better suited for workloads that use AES-NI, AVX, and similar instruction sets. The passmark random string sorting test, which stresses memory access patterns and sorting algorithms, also goes to the 7940HX by a 221.5% margin.

The Ryzen AI 7 345 wins only in Cinebench R23 singlecore, and only by 0.6%. That makes it the better option for strictly single-threaded Cinebench rendering, but the margin is tiny. In the other single-thread tests, the 7940HX holds a small lead: 1.7% in passmark single thread and passmark singlethread. So the Ryzen AI 7 345 does not establish a consistent single-thread advantage across the recorded benchmarks.

Specification Differences

The two processors differ in nearly every major specification category. The 7940HX uses 16 cores and 32 threads, while the Ryzen AI 7 345 uses 6 cores and 12 threads. Base clocks are 2.40 GHz for the 7940HX and 2.00 GHz for the Ryzen AI 7 345. Boost clocks are 5.20 GHz and 4.60 GHz, respectively. Thermal design power is also different: 55 W for the 7940HX versus 28 W for the Ryzen AI 7 345.

The sockets differ as well. The 7940HX uses AMD Socket FL1, while the Ryzen AI 7 345 uses AMD Socket FP8. The 7940HX has an unlocked multiplier, whereas the Ryzen AI 7 345 does not. The 7940HX supports PCIe Gen 5 with 28 lanes (CPU only), while the Ryzen AI 7 345 supports PCIe Gen 4 with 14 lanes (CPU only). The 7940HX offers DDR5 memory support with dual-channel configuration and 83.2 GB/s bandwidth. The Ryzen AI 7 345 supports both DDR5 and LPDDR5X, also dual-channel, with 89.6 GB/s bandwidth.

Integrated graphics differ: the 7940HX includes Radeon 610M, while the Ryzen AI 7 345 includes Radeon 840M. Neither supports ECC memory. The 7940HX has a release date of 2024-01-16, while the Ryzen AI 7 345 has a release date of 2025-01-14. The part numbers are 100-000001486 for the 7940HX and 100-000002122 for the Ryzen AI 7 345.

Architecture Differences

The 7940HX belongs to the 7000 series and uses the Zen 4 architecture with the Dragon Range codename. The Ryzen AI 7 345 is part of the Ryzen AI 300 generation and uses a hybrid Zen 5 / Zen 5c design with the Krackan Point codename. The process nodes differ: the 7940HX is built on a 5 nm process at TSMC, while the Ryzen AI 7 345 is built on a 4 nm process, also at TSMC. The 7940HX has 13,140 million transistors and a die size of 2x 71 mm². Transistor count and die size are not recorded for the Ryzen AI 7 345.

Cache configurations also differ substantially. The 7940HX has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 64 MB of L3 cache. The Ryzen AI 7 345 has 80 KB of L1 cache per core, 1 MB of L2 cache per core, but only 4 MB of L3 cache. The larger L3 cache on the 7940HX is a major factor in its performance advantage in multi-threaded benchmarks, particularly in memory-intensive tests like random string sorting and data compression.

The Ryzen AI 7 345 uses a newer process node, which likely contributes to its lower 28 W TDP and its narrow single-core win in Cinebench R23. However, the 7940HX compensates with a much higher core count, larger cache pool, and higher boost clock. The 7940HX also supports PCIe Gen 5, while the Ryzen AI 7 345 is limited to PCIe Gen 4. The memory bandwidth figures are close: 83.2 GB/s for the 7940HX versus 89.6 GB/s for the Ryzen AI 7 345, though the Ryzen AI part adds LPDDR5X support. The 7940HX remains an active production product, as does the Ryzen AI 7 345. The architectural split between the two is essentially a tradeoff between maximum throughput and efficiency, with the 7940HX taking the throughput crown in nearly every recorded benchmark.