AMD Ryzen 7 7745HX vs AMD Ryzen 7 7800X3D Comparison

The AMD Ryzen 7 7745HX and AMD Ryzen 7 7800X3D are both 8-core, 16-thread Zen 4 parts, yet they target entirely different platforms. The 7745HX is a mobile Dragon Range chip, while the 7800X3D is a desktop Raphael processor with a large L3 cache. Benchmark data shows a near-total average score tie—the 7745HX averages 33091, the 7800X3D averages 33079—but the distribution of wins reveals distinct character. The mobile chip takes 15 head-to-head benchmarks, while the desktop part wins 8, making this a study in workload-specific strengths.

Head-to-Head Benchmarks

The most dramatic split appears in PassMark’s prime number and physics tests, where the 7800X3D utterly dominates. In `passmark_find_prime_numbers`, the desktop chip scores 324 against the mobile chip’s 156, a massive 51.9% advantage. Similarly, `passmark_physics` shows 3522 versus 1697, a 51.8% lead for the 7800X3D. These are not marginal wins; they indicate the X3D’s cache configuration provides a substantial boost in integer-heavy and physics simulation workloads.

The 7745HX fights back in raw single-thread and multi-thread throughput. In `cinebench_r23_multicore`, the mobile processor scores 18452.5 versus 16817 for the desktop chip, a 9.7% lead. The `cinebench_r23_singlecore` result follows the same pattern: 1850 against 1713, an 8% advantage. The 3DMark suite also favors the 7745HX, with the largest gap in `3dmark_single_thread` (1023 vs 959, a 6.7% win) and `3dmark_2_threads` (1997 vs 1887, a 5.8% win). Even in `3dmark_16_threads`, the mobile chip edges ahead at 7993 versus 7980, though that is only a 0.2% difference.

Geekbench is the notable exception to the 7745HX’s lead. Here, the 7800X3D wins decisively in multi-core: 15610 versus 13613, a 12.8% margin. The single-core Geekbench result also goes to the desktop chip, though narrowly, at 2426 versus 2366 (a 2.5% lead). This contrast is striking—the same 8-core/16-thread configuration yields a 12.8% Geekbench multi-core win for the desktop part, while Cinebench R23 multi-core gives the mobile part a 9.7% win.

Other workload-specific results show a mixed bag. In `passmark_multithread`, the 7800X3D takes a 5% lead (34293 vs 32581). The desktop chip also wins `passmark_data_compression` (384669 vs 383322, a 0.4% edge) and `passmark_extended_instructions` (29166 vs 28966, a 0.7% edge). The 7745HX counters with wins in `passmark_floating_point_math` (64297 vs 61187, a 5.1% lead), `passmark_integer_math` (105773 vs 103639, a 2.1% lead), and `passmark_data_encryption` (22967 vs 22346, a 2.8% lead). The `passmark_single_thread` score also favors the mobile chip, at 3947 versus 3759, a 5% advantage.

The `3dmark_max_threads` result is a perfect tie at 7967 for both chips, showing that at maximum thread utilization, neither has an edge in that specific test. Overall, the 7745HX’s wins are more numerous but often smaller in magnitude, while the 7800X3D’s few losses are offset by two enormous wins in prime number finding and physics. The data suggests the 7745HX is the better all-rounder for typical productivity, while the 7800X3D has specialized strengths.

The Verdict

The data points to a clear split based on use case. The AMD Ryzen 7 7745HX is the choice for users prioritizing classic CPU benchmarks like Cinebench and 3DMark, where it consistently outperforms the 7800X3D by margins ranging from 0.2% to 9.7%. Its higher boost clock of 5.10 GHz versus 5.00 GHz likely contributes to its wins in single-threaded tests and in integer and floating-point math. For a mobile chip, it delivers exceptional performance in a 55 W TDP envelope, making it ideal for high-end laptops that need strong multi-threaded rendering or compilation power.

The AMD Ryzen 7 7800X3D is the specialist. Its 96 MB of shared L3 cache—three times the 7745HX’s 32 MB—powers its 51.9% lead in prime number finding and its 51.8% lead in physics simulations. For users running physics-based workloads, scientific computing, or specific integer-heavy algorithms, the 7800X3D is the superior part. The Geekbench multi-core result, where it leads by 12.8%, also suggests that certain real-world applications scale better with its cache layout. However, its lower boost clock and higher 120 W TDP mean it is not the faster chip in Cinebench or 3DMark.

Neither chip is a clear winner on average score—the 0.01% difference in average benchmark score (33091 vs 33079) is negligible. The decision hinges on the workload. Pick the 7745HX for general compute, where it wins 15 of 23 benchmarks. Pick the 7800X3D for cache-sensitive tasks, where its two massive wins outweigh its 8 total victories. The 7800X3D also carries a launch MSRP of $449, while the 7745HX has no listed launch MSRP.

FAQ

Q: Which CPU has a higher single-thread score in Cinebench R23?

A: The AMD Ryzen 7 7745HX, with a score of 1850, beating the 7800X3D’s 1713 by 8%.

Q: How large is the performance gap in PassMark’s physics test?

A: The 7800X3D scores 3522, which is 51.8% higher than the 7745HX’s 1697.

Q: Does the 7800X3D beat the 7745HX in any multi-threaded benchmark?

A: Yes, in Geekbench multi-core, the 7800X3D scores 15610 versus 13613, a 12.8% lead. It also wins PassMark multithread by 5% (34293 vs 32581).

Q: Are the average benchmark scores significantly different?

A: No. The 7745HX averages 33091, and the 7800X3D averages 33079, a difference of only 0.01% in favor of the mobile chip.

Q: Which CPU has more L3 cache?

A: The 7800X3D has 96 MB shared L3 cache, while the 7745HX has 32 MB shared L3 cache.

Q: What is the TDP difference between the two?

A: The 7745HX has a TDP of 55 W, while the 7800X3D has a TDP of 120 W.

Specification Differences

The two CPUs differ in several key specification fields. The base clock is higher on the 7800X3D at 4.20 GHz, while the 7745HX runs at 3.60 GHz. However, the boost clock is higher on the 7745HX at 5.10 GHz versus 5.00 GHz for the desktop chip. The TDP is a major difference: the mobile 7745HX is rated at 55 W, while the desktop 7800X3D is rated at 120 W.

The socket and market segment also differ. The 7745HX uses AMD Socket FL1 and is a mobile processor, while the 7800X3D uses AMD Socket AM5 and is a desktop processor. The codename differs as well—Dragon Range for the mobile chip and Raphael for the desktop chip. The integrated graphics are different: the 7745HX has a Radeon 610M, while the 7800X3D has a generic Radeon Graphics. The multiplier is unlocked on the 7745HX but locked on the 7800X3D. Finally, the part numbers are distinct: 100-000000721 for the mobile chip and 100-000000910 for the desktop chip.

Architecture Differences

Both processors are built on the same Zen 4 architecture and use a 5 nm process node from TSMC, but their physical characteristics diverge significantly. The 7745HX has 6,570 million transistors, while the 7800X3D packs 11,270 million—a difference reflected in the cache hierarchy. The L1 and L2 caches are identical at 64 KB per core and 1 MB per core, respectively. The L3 cache is where the 7800X3D distinguishes itself: 96 MB shared versus 32 MB shared for the 7745HX, a 3x increase.

Memory support is the same: both support DDR5 with a dual-channel memory bus and 83.2 GB/s bandwidth, and both support ECC memory. PCIe lanes differ, with the 7745HX offering Gen 5 with 28 lanes (CPU only), while the 7800X3D offers Gen 5 with 24 lanes (CPU only). The transistors count is the most telling architectural difference, as the 7800X3D’s additional 4,700 million transistors are dedicated to the larger L3 cache, which drives its specialized performance wins. Both chips share the same 71 mm² die size, highlighting that the extra cache is stacked rather than increasing die area. The 7800X3D’s higher TDP of 120 W versus 55 W for the 7745HX reflects the power required to feed that larger cache at desktop clocks.