i9-11900KB vs i7-7800X
Aggregate performance score
i9-11900KB outperforms i7-7800X by an impressive 78% based on our aggregate benchmark results.
Primary details
Comparing Core i7-7800X and Core i9-11900KB processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 904 | 481 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.59 | 17.89 |
| Market segment | Desktop processor | Desktop processor |
| Series | Intel Core i7 | no data |
| Architecture codename | Skylake (server) (2017−2019) | Tiger Lake-H (2021) |
| Release date | 30 May 2017 (7 years ago) | 14 June 2021 (3 years ago) |
| Launch price (MSRP) | $389 | $539 |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-11900KB has 398% better value for money than i7-7800X.
Detailed specifications
Core i7-7800X and Core i9-11900KB 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) | 8 (Octa-Core) |
| Threads | 12 | 16 |
| Base clock speed | 3.5 GHz | 3.3 GHz |
| Boost clock speed | 4 GHz | 4.9 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | 8 GT/s |
| Multiplier | 35 | no data |
| L1 cache | 384 KB | 768 KB |
| L2 cache | 6 MB | 10 MB |
| L3 cache | 8.25 MB (shared) | 24 MB |
| Chip lithography | 14 nm | 10 nm SuperFin |
| Die size | no data | 190 mm2 |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | 72 °C | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | + | - |
| Unlocked multiplier | + | + |
Compatibility
Information on Core i7-7800X and Core i9-11900KB 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 | FCBGA1787 |
| Power consumption (TDP) | 140 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-7800X and Core i9-11900KB. 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 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | + |
| TSX | + | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Turbo Boost Max 3.0 | no data | + |
| Status | Discontinued | Launched |
| Deep Learning Boost | - | + |
Security technologies
Core i7-7800X and Core i9-11900KB technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | + | + |
| Secure Key | no data | + |
| Identity Protection | - | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-7800X and Core i9-11900KB are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-7800X and Core i9-11900KB. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-2400 | DDR4 |
| Maximum memory size | 128 GB | 128 GB |
| Max memory channels | 4 | 2 |
| Maximum memory bandwidth | 85.33 GB/s | 51.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | N/A | Intel® UHD Graphics for 11th Gen Intel® Processors |
| Quick Sync Video | - | + |
| Graphics max frequency | no data | 1.45 GHz |
| Execution Units | no data | 32 |
Graphics interfaces
Available interfaces and connections of Core i7-7800X and Core i9-11900KB integrated GPUs.
| Number of displays supported | no data | 4 |
Graphics image quality
Maximum display resolutions supported by Core i7-7800X and Core i9-11900KB integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | no data | + |
| Max resolution over HDMI 1.4 | no data | 4096x2304@60Hz |
| Max resolution over eDP | no data | 4096 x 2304@60Hz |
| Max resolution over DisplayPort | no data | 7680x4320@60Hz |
Graphics API support
APIs supported by Core i7-7800X and Core i9-11900KB integrated GPUs, sometimes API versions are included.
| DirectX | no data | 12 |
| OpenGL | no data | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Core i7-7800X and Core i9-11900KB.
| PCIe version | 3.0 | 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 | 8.35 | 14.86 |
| Recency | 30 May 2017 | 14 June 2021 |
| Physical cores | 6 | 8 |
| Threads | 12 | 16 |
| Chip lithography | 14 nm | 10 nm |
| Power consumption (TDP) | 140 Watt | 65 Watt |
i9-11900KB has a 78% higher aggregate performance score, an age advantage of 4 years, 33.3% more physical cores and 33.3% more threads, a 40% more advanced lithography process, and 115.4% lower power consumption.
The Core i9-11900KB is our recommended choice as it beats the Core i7-7800X in performance tests.
Should you still have questions on choice between Core i7-7800X and Core i9-11900KB, ask them in Comments section, and we shall answer.
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