i9-9800X vs i5-8259U
Primary details
Comparing Core i5-8259U and Core i9-9800X processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1222 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core i5 | no data |
| Power efficiency | 16.76 | no data |
| Architecture codename | Coffee Lake-U (2018−2019) | Skylake-X (2018) |
| Release date | 2 April 2018 (6 years ago) | October 2018 (6 years ago) |
| Launch price (MSRP) | $320 | no data |
Detailed specifications
Core i5-8259U and Core i9-9800X 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 | 4 (Quad-Core) | 8 (Octa-Core) |
| Threads | 8 | 16 |
| Base clock speed | 2.3 GHz | no data |
| Boost clock speed | 3.8 GHz | 3.8 GHz |
| Bus type | OPI | no data |
| Bus rate | 4 GT/s | no data |
| Multiplier | 23 | no data |
| L1 cache | 256 KB | 64K (per core) |
| L2 cache | 1 MB | 1 MB (per core) |
| L3 cache | 6 MB (shared) | 16.5 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Die size | 126 mm2 | no data |
| Maximum core temperature | 100 °C | no data |
| Maximum case temperature (TCase) | 72 °C | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | - | + |
Compatibility
Information on Core i5-8259U and Core i9-9800X 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 | FCBGA1528 | 2066 |
| Power consumption (TDP) | 28 Watt | 165 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i5-8259U and Core i9-9800X. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | no data |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| eDRAM | 128 MB | no data |
| Speed Shift | + | no data |
| My WiFi | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | - | + |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Flex Memory Access | + | no data |
Security technologies
Core i5-8259U and Core i9-9800X technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| 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 i5-8259U and Core i9-9800X are enumerated here.
| AMD-V | + | - |
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i5-8259U and Core i9-9800X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR4 |
| Maximum memory size | 32 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 38.397 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel Iris Plus Graphics 655 | no data |
| Max video memory | 32 GB | no data |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.05 GHz | no data |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i5-8259U and Core i9-9800X integrated GPUs.
| Number of displays supported | 3 | no data |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| DVI | + | no data |
Graphics image quality
Maximum display resolutions supported by Core i5-8259U and Core i9-9800X integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | + | no data |
| Max resolution over HDMI 1.4 | 4096x2304@30Hz | no data |
| Max resolution over eDP | 4096x2304@60Hz | no data |
| Max resolution over DisplayPort | 4096x2304@60Hz | no data |
Graphics API support
APIs supported by Core i5-8259U and Core i9-9800X 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 i5-8259U and Core i9-9800X.
| PCIe version | 3.0 | no data |
| PCI Express lanes | 16 | no data |
Pros & cons summary
| Physical cores | 4 | 8 |
| Threads | 8 | 16 |
| Power consumption (TDP) | 28 Watt | 165 Watt |
i5-8259U has 489.3% lower power consumption.
i9-9800X, on the other hand, has 100% more physical cores and 100% more threads.
We couldn't decide between Core i5-8259U and Core i9-9800X. We've got no test results to judge.
Be aware that Core i5-8259U is a notebook processor while Core i9-9800X is a desktop one.
Should you still have questions on choice between Core i5-8259U and Core i9-9800X, ask them in Comments section, and we shall answer.
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