i7-1255U vs i7-4950HQ
Aggregate performance score
Core i7-1255U outperforms Core i7-4950HQ by a whopping 107% based on our aggregate benchmark results.
Primary details
Comparing Core i7-4950HQ and Core i7-1255U processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1380 | 878 |
| Place by popularity | not in top-100 | 37 |
| Market segment | Laptop | Laptop |
| Series | Intel Core i7 | Intel Alder Lake-M |
| Power efficiency | 8.34 | 53.98 |
| Architecture codename | Crystalwell (2013−2014) | Alder Lake-U (2022) |
| Release date | 2 June 2013 (11 years ago) | 23 February 2022 (2 years ago) |
| Launch price (MSRP) | $657 | no data |
Detailed specifications
Core i7-4950HQ and Core i7-1255U 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) | 10 (Deca-Core) |
| Threads | 8 | 12 |
| Base clock speed | 2.4 GHz | 1.7 GHz |
| Boost clock speed | 3.6 GHz | 4.7 GHz |
| Bus type | DMI 2.0 | no data |
| Bus rate | 5 GT/s | no data |
| Multiplier | 24 | no data |
| L1 cache | 64K (per core) | 80K (per core) |
| L2 cache | 1 MB | 1.25 MB (per core) |
| L3 cache | 6 MB | 12 MB (shared) |
| Chip lithography | 22 nm | Intel 7 nm |
| Die size | 264 mm2 | no data |
| Maximum core temperature | 100 °C | 100 °C |
| Maximum case temperature (TCase) | 100 °C | no data |
| Number of transistors | 1,400 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i7-4950HQ and Core i7-1255U 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 |
| Socket | FCBGA1364 | FCBGA1744 |
| Power consumption (TDP) | 47 Watt | 15 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-4950HQ and Core i7-1255U. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 | Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2 |
| AES-NI | + | + |
| FMA | - | + |
| AVX | + | + |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | + |
| Speed Shift | no data | + |
| My WiFi | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | + |
| TSX | + | + |
| Idle States | + | no data |
| Thermal Monitoring | + | + |
| Flex Memory Access | no data | + |
| FDI | + | no data |
| Deep Learning Boost | - | + |
Security technologies
Core i7-4950HQ and Core i7-1255U technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
| Secure Key | + | + |
| Identity Protection | + | - |
| OS Guard | no data | + |
| Anti-Theft | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i7-4950HQ and Core i7-1255U are enumerated here.
| AMD-V | + | - |
| VT-d | + | + |
| VT-x | + | + |
| EPT | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-4950HQ and Core i7-1255U. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR4, DDR5 |
| Maximum memory size | 32 GB | 64 GB |
| Max memory channels | 2 | 2 |
| Maximum memory bandwidth | 25.6 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel Iris Pro Graphics 5200 | Intel® Iris® Xe Graphics eligible |
| Max video memory | 2 GB | no data |
| Quick Sync Video | + | + |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.3 GHz | 1.25 GHz |
| Execution Units | no data | 96 |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i7-4950HQ and Core i7-1255U integrated GPUs.
| Number of displays supported | 3 | 4 |
| eDP | + | no data |
| DisplayPort | + | - |
| HDMI | + | - |
| VGA | + | no data |
Graphics image quality
Maximum display resolutions supported by Core i7-4950HQ and Core i7-1255U integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | 3840x2160@30Hz | 4096 x 2304 @ 60Hz |
| Max resolution over eDP | no data | 4096 x 2304 @ 120Hz |
| Max resolution over DisplayPort | 3840x2160@60Hz | 7680 x 4320 @ 60Hz |
| Max resolution over VGA | 2880x1800@60Hz | no data |
Graphics API support
APIs supported by Core i7-4950HQ and Core i7-1255U integrated GPUs, sometimes API versions are included.
| DirectX | 11.2/12 | 12.1 |
| OpenGL | 4.3 | 4.6 |
Peripherals
Specifications and connection of peripherals supported by Core i7-4950HQ and Core i7-1255U.
| PCIe version | 3 | 4.0 |
| PCI Express lanes | 16 | 20 |
Pros & cons summary
| Performance score | 4.30 | 8.88 |
| Recency | 2 June 2013 | 23 February 2022 |
| Physical cores | 4 | 10 |
| Threads | 8 | 12 |
| Power consumption (TDP) | 47 Watt | 15 Watt |
i7-1255U has a 106.5% higher aggregate performance score, an age advantage of 8 years, 150% more physical cores and 50% more threads, and 213.3% lower power consumption.
The Core i7-1255U is our recommended choice as it beats the Core i7-4950HQ in performance tests.
Should you still have questions on choice between Core i7-4950HQ and Core i7-1255U, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
