Ryzen 5 8645HS vs i9-9900
Aggregate performance score
Ryzen 5 8645HS outperforms Core i9-9900 by a substantial 38% based on our aggregate benchmark results.
Primary details
Comparing Core i9-9900 and Ryzen 5 8645HS processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 743 | 499 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 9.02 | no data |
| Market segment | Desktop processor | Laptop |
| Series | Intel Core i9 | no data |
| Power efficiency | 15.11 | 30.22 |
| Architecture codename | Coffee Lake-R (2018−2019) | Hawk Point-HS (Zen 4) (2023−2024) |
| Release date | 23 April 2019 (5 years ago) | 6 December 2023 (less than a year ago) |
| Launch price (MSRP) | $439 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i9-9900 and Ryzen 5 8645HS 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 | 8 (Octa-Core) | 6 (Hexa-Core) |
| Threads | 16 | 12 |
| Base clock speed | 3.1 GHz | 4.3 GHz |
| Boost clock speed | 5 GHz | 5 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 256K (per core) | 1 MB (per core) |
| L3 cache | 16 MB (shared) | 16 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | no data | 178 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | no data | 25,000 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
Compatibility
Information on Core i9-9900 and Ryzen 5 8645HS 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 (Uniprocessor) | 1 |
| Socket | FCLGA1151 | FP8 |
| Power consumption (TDP) | 65 Watt | 45 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i9-9900 and Ryzen 5 8645HS. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | - |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| SIPP | + | - |
| Precision Boost 2 | no data | + |
Security technologies
Core i9-9900 and Ryzen 5 8645HS technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| Secure Key | + | no data |
| MPX | + | - |
| Identity Protection | + | - |
| SGX | Yes with Intel® ME | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i9-9900 and Ryzen 5 8645HS are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i9-9900 and Ryzen 5 8645HS. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR5 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 42.671 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card Compare | Intel UHD Graphics 630 | AMD Radeon 760M ( - 2600 MHz) |
| Max video memory | 64 GB | no data |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.2 GHz | no data |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i9-9900 and Ryzen 5 8645HS integrated GPUs.
| Number of displays supported | 3 | no data |
Graphics image quality
Maximum display resolutions supported by Core i9-9900 and Ryzen 5 8645HS integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | + | no data |
| Max resolution over HDMI 1.4 | 4096 x 2304@24Hz | no data |
| Max resolution over eDP | 4096 x 2304@60Hz | no data |
| Max resolution over DisplayPort | 4096 x 2304@60Hz | no data |
Graphics API support
APIs supported by Core i9-9900 and Ryzen 5 8645HS integrated GPUs, sometimes API versions are included.
| DirectX | 12 | no data |
| OpenGL | 4.5 | no data |
Peripherals
Specifications and connection of peripherals supported by Core i9-9900 and Ryzen 5 8645HS.
| PCIe version | 3.0 | 4.0 |
| PCI Express lanes | 16 | 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 | 10.38 | 14.37 |
| Integrated graphics card | 3.09 | 14.88 |
| Recency | 23 April 2019 | 6 December 2023 |
| Physical cores | 8 | 6 |
| Threads | 16 | 12 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 65 Watt | 45 Watt |
i9-9900 has 33.3% more physical cores and 33.3% more threads.
Ryzen 5 8645HS, on the other hand, has a 38.4% higher aggregate performance score, 381.6% faster integrated GPU, an age advantage of 4 years, a 250% more advanced lithography process, and 44.4% lower power consumption.
The Ryzen 5 8645HS is our recommended choice as it beats the Core i9-9900 in performance tests.
Note that Core i9-9900 is a desktop processor while Ryzen 5 8645HS is a notebook one.
Should you still have questions on choice between Core i9-9900 and Ryzen 5 8645HS, ask them in Comments section, and we shall answer.
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