Ryzen 9 5900XT vs Ryzen 5 7645HX
Aggregate performance score
Ryzen 9 5900XT outperforms Ryzen 5 7645HX by an impressive 66% based on our aggregate benchmark results.
Primary details
Comparing Ryzen 5 7645HX and Ryzen 9 5900XT processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 375 | 162 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 70.50 |
| Market segment | Laptop | Desktop processor |
| Power efficiency | 35.58 | 25.27 |
| Architecture codename | Dragon Range (Zen4) (2023) | Vermeer (2020−2024) |
| Release date | 4 January 2023 (1 year ago) | 31 July 2024 (less than a year ago) |
| Launch price (MSRP) | no data | $349 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 5 7645HX and Ryzen 9 5900XT basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.
| Physical cores | 6 (Hexa-Core) | 16 (Hexadeca-Core) |
| Threads | 12 | 32 |
| Base clock speed | 4 GHz | 3.3 GHz |
| Boost clock speed | 5 GHz | 4.8 GHz |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 512 KB (per core) |
| L3 cache | 32 MB (shared) | 64 MB |
| Chip lithography | 5 nm | 7 nm |
| Die size | 71 mm2 | 2x 74 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 6570 Million | 8,300 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Ryzen 5 7645HX and Ryzen 9 5900XT compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.
| Number of CPUs in a configuration | 1 | 1 |
| Socket | FL1 | AM4 |
| Power consumption (TDP) | 45 Watt | 105 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 5 7645HX and Ryzen 9 5900XT. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| AVX | + | + |
| Precision Boost 2 | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen 5 7645HX and Ryzen 9 5900XT are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 5 7645HX and Ryzen 9 5900XT. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-5200 | DDR4 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon 610M | N/A |
Peripherals
Specifications and connection of peripherals supported by Ryzen 5 7645HX and Ryzen 9 5900XT.
| PCIe version | 5.0 | 4.0 |
| PCI Express lanes | 28 | 20 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 17.56 | 29.10 |
| Recency | 4 January 2023 | 31 July 2024 |
| Physical cores | 6 | 16 |
| Threads | 12 | 32 |
| Chip lithography | 5 nm | 7 nm |
| Power consumption (TDP) | 45 Watt | 105 Watt |
Ryzen 5 7645HX has a 40% more advanced lithography process, and 133.3% lower power consumption.
Ryzen 9 5900XT, on the other hand, has a 65.7% higher aggregate performance score, an age advantage of 1 year, and 166.7% more physical cores and 166.7% more threads.
The Ryzen 9 5900XT is our recommended choice as it beats the Ryzen 5 7645HX in performance tests.
Be aware that Ryzen 5 7645HX is a notebook processor while Ryzen 9 5900XT is a desktop one.
Should you still have questions on choice between Ryzen 5 7645HX and Ryzen 9 5900XT, ask them in Comments section, and we shall answer.
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