AMD Ryzen 5 7645HX

AMD Ryzen 5 7645HX is a 7000-series mobile processor built on Zen 4 Dragon Range at 5 nm. It combines 6 cores and 12 threads with a base clock of 4.00 GHz, a boost clock of 5.00 GHz, and a 45 W TDP. Benchmark data places it at the 87th percentile of all CPUs, with an average benchmark score of 31,213 — within 0.4% of every listed nearest rival. It supports DDR5 memory, PCIe Gen 5, ECC, and includes Radeon 610M integrated graphics.

Who Should Consider It

The Ryzen 5 7645HX is best suited to workloads that can use six cores and twelve threads at high clock speeds. The Cinebench R23 multi-core score of 22,504, the Cinebench R20 multi-core score of 9,451, and the Cinebench R15 multi-core score of 2,268 all point to solid throughput for threaded creation workloads such as rendering, encoding, and compilation. The Geekbench multi-core result of 11,586 reinforces that this is not a low-power efficiency part; it is a mobile processor with real parallel performance.

For office and everyday productivity, the Passmark multi-thread score of 26,476 and the Passmark single-thread score of 3,907 indicate a responsive system in typical desktop applications. The Passmark data compression score of 302,256 and data encryption score of 17,900 are further signs that file operations and encrypted storage workloads should run comfortably. Users whose main task is web browsing, document editing, or productivity software will find enough headroom.

For gaming, the single-thread scores matter most. The Cinebench R23 single-core score of 3,177, the Geekbench single-core score of 2,657, and the Passmark single-thread score of 3,907 indicate strong latency-sensitive performance. However, the integrated graphics solution is Radeon 610M, so gaming performance in modern 3D titles will depend on a separate discrete GPU. The CPU side can feed a fast GPU, but the integrated GPU is not a high-end gaming solution on its own.

This processor is not aimed at fanless, ultraportable systems. The 45 W TDP class and 5.00 GHz boost clock imply a chassis with serious active cooling. Users should consider it when they need a mobile CPU that can handle both demanding threaded applications and fast single-threaded responses in a performance laptop.

Power and Thermals

The 45 W TDP is the defining thermal figure. The Ryzen 5 7645HX is built on a 5 nm process by TSMC, with 6,570 million transistors in a 71 mm² die. That process efficiency does not remove the need for real cooling: a processor with a 5.00 GHz boost clock and six cores will generate significant heat under sustained load.

The thermal class implied by 45 W is a performance notebook tier. This is not a low-power part for thin, fanless designs. It needs a cooling solution that can sustain all-core workloads without excessive throttling. The base clock of 4.00 GHz already runs high, and the boost clock of 5.00 GHz increases thermal demand further.

The fact that the processor is unlocked for no overclocking does not reduce cooling requirements. A locked multiplier means the user cannot manually raise clocks, but the stock boost behavior still requires the laptop manufacturer to provide adequate heat dissipation. The data shows a CPU designed for high sustained performance in a mobile package, not for extreme energy efficiency.

Benchmark Performance

The average benchmark score of 31,213 places the Ryzen 5 7645HX in the 87th percentile of all CPUs in the database. This is a strong aggregate result, but the nearest rivals are extremely close.

Against the Intel Core i5-13600H, the Ryzen 5 7645HX has an average score of 31,213 versus 31,305, with a deltaPct of -0.3. Against the Intel Core i7-12650HX, the comparison is similar: 31,213 versus 31,310, also a deltaPct of -0.3. The AMD Ryzen 7 8840HS is effectively tied, with 31,213 versus 31,111 and a deltaPct of 0.3. The Intel Core i7-13700TE trails by a hair, with 31,213 versus 31,093 and a deltaPct of 0.4.

The individual Cinebench results show where that aggregate performance comes from. In Cinebench R23, the multi-core score is 22,504 and the single-core score is 3,177. Cinebench R20 produces a multi-core score of 9,451 and a single-core score of 1,334. Cinebench R15 produces a multi-core score of 2,268 and a single-core score of 320. Geekbench reports a multi-core score of 11,586 and a single-core score of 2,657.

Passmark results add more texture. The multi-thread score is 26,476, the single-thread score is 3,907, integer math scores 77,432, floating point math scores 48,798, extended instructions score 22,969, data compression scores 302,256, data encryption scores 17,900, physics scores 1,497, random string sorting scores 34,434, and find prime numbers scores 178. The prime number score is a notable outlier relative to the other Passmark metrics, suggesting that this CPU is much stronger in general math and throughput-oriented tests than in that specific scalar workload.

Overall, the benchmark data shows a processor that is dead-even with its closest competitors. The deltas of -0.3, -0.3, 0.3, and 0.4 are negligible in practical terms. Any of the four rival comparisons could swing either way depending on which benchmark is used.

Platform and Compatibility

The Ryzen 5 7645HX uses AMD Socket FL1, a mobile platform socket. It is part of the 7000 series, with the architecture listed as Zen 4 and the codename Dragon Range. The market segment is Mobile, so the processor is intended for laptops rather than desktop builds.

Memory support is DDR5 with a dual-channel memory bus and a memory bandwidth of 83.2 GB/s. ECC memory is supported, which is notable for a mobile part and can matter for data-integrity-sensitive workloads. The CPU provides PCIe Gen 5 with 28 lanes from the CPU, enabling high-bandwidth discrete GPUs and NVMe storage.

Integrated graphics are provided by Radeon 610M. The multiplier is not unlocked, so overclocking is not supported. The part number is 100-000000872, and production status is Active. The release date is listed as 2023-01-03.

Because this is a mobile socket, the upgrade path is tied to the laptop design. Users cannot install this processor on a desktop board. The 45 W TDP and Socket FL1 indicate a motherboard designed for high-performance mobile CPUs. The PCIe Gen 5 support means the platform is current for fast storage and modern GPUs, while the DDR5 and ECC options round out the memory feature set.

How It Compares

Against the Intel Core i5-13600H, the Ryzen 5 7645HX is 0.3% behind in average score. The numbers are 31,213 versus 31,305. This is a negligible difference, so the two processors should be considered equivalent in aggregate performance.

Against the Intel Core i7-12650HX, the Ryzen 5 7645HX is also 0.3% behind. The average score is 31,213 versus 31,310. Despite the Intel part carrying a higher-tier brand name, the aggregate benchmark difference is only a rounding error.

Against the AMD Ryzen 7 8840HS, the Ryzen 5 7645HX is 0.3% ahead. The average score is 31,213 versus 31,111. A six-core Ryzen 5 effectively matches a Ryzen 7 part in this dataset, which shows that core count alone does not separate these mobile chips.

Against the Intel Core i7-13700TE, the Ryzen 5 7645HX is 0.4% ahead. The average score is 31,213 versus 31,093. Once again, the delta is small enough that application-specific behavior will matter far more than the aggregate score.

FAQ

Q: What socket does the AMD Ryzen 5 7645HX use?

A: It uses AMD Socket FL1.

Q: Does the Ryzen 5 7645HX support DDR5 and ECC memory?

A: Yes, memory support is DDR5 through a dual-channel bus with 83.2 GB/s bandwidth, and ECC memory is supported.

Q: What integrated graphics does it include?

A: It includes Radeon 610M.

Q: Is the multiplier unlocked for overclocking?

A: No, the multiplier unlocked field is false, so overclocking is not supported.

Q: What is the release date of the Ryzen 5 7645HX?

A: The release date is 2023-01-03.

Q: How many PCIe lanes does the CPU provide?

A: It provides PCIe Gen 5 with 28 lanes from the CPU.

Single-Thread vs Multi-Thread Behavior

The single-thread results are strong: Cinebench R23 single-core scores 3,177, Cinebench R20 single-core scores 1,334, Cinebench R15 single-core scores 320, Geekbench single-core scores 2,657, and Passmark single-thread scores 3,907. These numbers indicate a fast, responsive core design with a 5.00 GHz boost clock.

The multi-thread results are also strong: Cinebench R23 multi-core scores 22,504, Cinebench R20 multi-core scores 9,451, Cinebench R15 multi-core scores 2,268, Geekbench multi-core scores 11,586, and Passmark multi-thread scores 26,476. The six cores and twelve threads scale well in threaded workloads, producing results that put the chip at the 87th percentile of all CPUs.

The relationship between single-thread and multi-thread performance varies by benchmark. Geekbench multi-core is 11,586 against a single-core score of 2,657, while Passmark multi-thread is 26,476 against a single-thread score of 3,907. In Cinebench R23, the multi-core score of 22,504 against a single-core score of 3,177 shows a large jump in performance when all threads are engaged.

This split has real workload implications. Applications that rely on one or two threads, such as many UI-driven productivity tools and older games, will lean on the high single-thread scores and the 5.00 GHz boost. Applications that can use all cores, such as rendering, video encoding, and scientific computing, will see the full benefit of the six-core design. The passmark integer math score of 77,432 and floating point math score of 48,798 show that both integer and floating-point throughput are high, while the lower find-prime-numbers score of 178 indicates that not every scalar workload will scale equally well. The Ryzen 5 7645HX is a balanced mobile processor, with enough single-thread speed for everyday responsiveness and enough multi-thread muscle for demanding parallel tasks.