i7-7800X vs Ultra 7 155H
Aggregate performance score
Core Ultra 7 155H outperforms Core i7-7800X by an impressive 94% based on our aggregate benchmark results.
Primary details
Comparing Core Ultra 7 155H and Core i7-7800X processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 439 | 947 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 3.13 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Meteor Lake-H | Intel Core i7 |
| Power efficiency | 53.16 | 5.48 |
| Architecture codename | Meteor Lake-H (2023) | Skylake (server) (2017−2018) |
| Release date | 14 December 2023 (1 year ago) | 26 June 2017 (7 years ago) |
| Launch price (MSRP) | $503 | $383 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core Ultra 7 155H and Core i7-7800X 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 | 16 (Hexadeca-Core) | 6 (Hexa-Core) |
| Threads | 22 | 12 |
| Base clock speed | 3.8 GHz | 3.5 GHz |
| Boost clock speed | 4.8 GHz | 4 GHz |
| Bus type | no data | DMI 3.0 |
| Bus rate | no data | 4 × 8 GT/s |
| Multiplier | no data | 35 |
| L1 cache | 112 KB (per core) | 64 KB (per core) |
| L2 cache | 2 MB (per core) | 1 MB (per core) |
| L3 cache | 24 MB (shared) | 8.25 MB (shared) |
| Chip lithography | 7 nm | 14 nm |
| Maximum core temperature | 110 °C | 100 °C |
| Maximum case temperature (TCase) | no data | 72 °C |
| 64 bit support | + | + |
| Windows 11 compatibility | no data | + |
| Unlocked multiplier | - | + |
Compatibility
Information on Core Ultra 7 155H and Core i7-7800X 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 (Uniprocessor) |
| Socket | Intel BGA 2049 | FCLGA2066 |
| Power consumption (TDP) | 28 Watt | 140 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 7 155H and Core i7-7800X. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 |
| AES-NI | + | + |
| AVX | + | + |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | + | + |
Security technologies
Core Ultra 7 155H and Core i7-7800X 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 Ultra 7 155H and Core i7-7800X are enumerated here.
| VT-d | + | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 155H and Core i7-7800X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5 | DDR4-2400 |
| Maximum memory size | no data | 128 GB |
| Max memory channels | no data | 4 |
| Maximum memory bandwidth | no data | 85.33 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel Arc 8-Cores iGPU ( - 2250 MHz) | N/A |
Peripherals
Specifications and connection of peripherals supported by Core Ultra 7 155H and Core i7-7800X.
| PCIe version | 5.0 | 3.0 |
| PCI Express lanes | 8 | 28 |
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 | 15.61 | 8.04 |
| Recency | 14 December 2023 | 26 June 2017 |
| Physical cores | 16 | 6 |
| Threads | 22 | 12 |
| Chip lithography | 7 nm | 14 nm |
| Power consumption (TDP) | 28 Watt | 140 Watt |
Ultra 7 155H has a 94.2% higher aggregate performance score, an age advantage of 6 years, 166.7% more physical cores and 83.3% more threads, a 100% more advanced lithography process, and 400% lower power consumption.
The Core Ultra 7 155H is our recommended choice as it beats the Core i7-7800X in performance tests.
Be aware that Core Ultra 7 155H is a notebook processor while Core i7-7800X is a desktop one.
Should you still have questions on choice between Core Ultra 7 155H and Core i7-7800X, ask them in Comments section, and we shall answer.
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