i7-8665UE vs i7-9800X
Aggregate performance score
Core i7-9800X outperforms Core i7-8665UE by a whopping 249% based on our aggregate benchmark results.
Primary details
Comparing Core i7-9800X and Core i7-8665UE processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 698 | 1609 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 6.36 | no data |
| Market segment | Desktop processor | Laptop |
| Series | Intel Core i7 | no data |
| Power efficiency | 6.51 | 20.52 |
| Architecture codename | Skylake (server) (2017−2018) | Whiskey Lake-U (2018−2019) |
| Release date | 19 October 2018 (6 years ago) | 1 October 2018 (6 years ago) |
| Launch price (MSRP) | $589 | $409 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core i7-9800X and Core i7-8665UE 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) | 4 (Quad-Core) |
| Threads | 16 | 8 |
| Base clock speed | 3.8 GHz | 1.7 GHz |
| Boost clock speed | 4.5 GHz | 4.4 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| Multiplier | 38 | no data |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 1 MB (per core) | 256 KB (per core) |
| L3 cache | 16.5 MB (shared) | 8 MB (shared) |
| Chip lithography | 14 nm | 14 nm |
| Maximum core temperature | 95 °C | no data |
| Maximum case temperature (TCase) | 72 °C | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-9800X and Core i7-8665UE 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 | FCLGA2066 | Intel BGA 1528 |
| Power consumption (TDP) | 165 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-9800X and Core i7-8665UE. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 | no data |
| AES-NI | + | + |
| AVX | + | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | + |
| Turbo Boost Max 3.0 | + | no data |
Security technologies
Core i7-9800X and Core i7-8665UE technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-9800X and Core i7-8665UE are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-9800X and Core i7-8665UE. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2666 | DDR3, DDR4 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | 4 | no data |
| Maximum memory bandwidth | 85.33 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | Intel UHD Graphics 620 |
Peripherals
Specifications and connection of peripherals supported by Core i7-9800X and Core i7-8665UE.
| PCIe version | 3.0 | 3.0 |
| PCI Express lanes | 44 | 16 |
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 | 11.28 | 3.23 |
| Physical cores | 8 | 4 |
| Threads | 16 | 8 |
| Power consumption (TDP) | 165 Watt | 15 Watt |
i7-9800X has a 249.2% higher aggregate performance score, and 100% more physical cores and 100% more threads.
i7-8665UE, on the other hand, has 1000% lower power consumption.
The Core i7-9800X is our recommended choice as it beats the Core i7-8665UE in performance tests.
Note that Core i7-9800X is a desktop processor while Core i7-8665UE is a notebook one.
Should you still have questions on choice between Core i7-9800X and Core i7-8665UE, ask them in Comments section, and we shall answer.
Other comparisons
We've compiled a selection of CPU comparisons, ranging from closely matched processors to other comparisons that may be of interest.
