EPYC 4345P vs Ultra 9 275HX
Aggregate performance score
Core Ultra 9 275HX outperforms EPYC 4345P by a considerable 48% based on our aggregate benchmark results.
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 132 | 262 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 60.51 |
| Market segment | Laptop | Server |
| Power efficiency | 60.96 | 34.77 |
| Designer | Intel | AMD |
| Manufacturer | no data | TSMC |
| Architecture codename | Arrow Lake-HX (2025) | Grado (2025) |
| Release date | 1 January 2025 (less than a year ago) | 13 May 2025 (recently) |
| Launch price (MSRP) | no data | $329 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Detailed specifications
Core Ultra 9 275HX and EPYC 4345P 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 | 24 (Tetracosa-Core) | 8 (Octa-Core) |
| Performance-cores | 8 | no data |
| Efficient-cores | 16 | no data |
| Threads | 24 | 16 |
| Base clock speed | 2.1 GHz | 3.8 GHz |
| Boost clock speed | 5.4 GHz | 5.5 GHz |
| L1 cache | no data | 80 KB (per core) |
| L2 cache | 40 MB | 1 MB (per core) |
| L3 cache | 36 MB | 32 MB (shared) |
| Chip lithography | 3 nm | 4 nm |
| Die size | no data | 70.6 mm2 |
| Number of transistors | no data | 8,315 million |
| 64 bit support | + | + |
Compatibility
Information on Core Ultra 9 275HX and EPYC 4345P 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 | no data | 1 |
| Socket | FCBGA2114 | AM5 |
| Power consumption (TDP) | 55 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core Ultra 9 275HX and EPYC 4345P. 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) | + | no data |
| Speed Shift | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Turbo Boost Max 3.0 | + | no data |
| Precision Boost 2 | no data | + |
| Deep Learning Boost | + | - |
| Supported AI Software Frameworks | OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN | - |
Security technologies
Core Ultra 9 275HX and EPYC 4345P technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core Ultra 9 275HX and EPYC 4345P are enumerated here.
| AMD-V | - | + |
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core Ultra 9 275HX and EPYC 4345P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR5-6400 | DDR5 |
| Maximum memory size | 256 GB | no data |
| Max memory channels | 2 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel® Graphics | AMD Radeon Graphics |
| Quick Sync Video | + | - |
| Graphics max frequency | 1.9 GHz | no data |
Graphics interfaces
Available interfaces and connections of Core Ultra 9 275HX and EPYC 4345P integrated GPUs.
| Number of displays supported | 4 | no data |
Graphics image quality
Maximum display resolutions supported by Core Ultra 9 275HX and EPYC 4345P integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | 4K @ 60Hz (HDMI 2.1 TMDS) 8K @ 60Hz (HDMI2.1 FRL) | no data |
| Max resolution over eDP | 3840x2400 @ 120Hz | no data |
| Max resolution over DisplayPort | 7680 x 4320 @ 60Hz | no data |
Graphics API support
APIs supported by Core Ultra 9 275HX and EPYC 4345P 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 Ultra 9 275HX and EPYC 4345P.
| PCIe version | 5.0 and 4.0 | 5.0 |
| PCI Express lanes | 24 | 24 |
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.
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. Other than that, Passmark measures multi-core performance.
Pros & cons summary
| Performance score | 34.76 | 23.43 |
| Recency | 1 January 2025 | 13 May 2025 |
| Physical cores | 24 | 8 |
| Threads | 24 | 16 |
| Chip lithography | 3 nm | 4 nm |
| Power consumption (TDP) | 55 Watt | 65 Watt |
Ultra 9 275HX has a 48.4% higher aggregate performance score, 200% more physical cores and 50% more threads, a 33.3% more advanced lithography process, and 18.2% lower power consumption.
EPYC 4345P, on the other hand, has an age advantage of 4 months.
The Intel Core Ultra 9 275HX is our recommended choice as it beats the AMD EPYC 4345P in performance tests.
Be aware that Core Ultra 9 275HX is a notebook processor while EPYC 4345P is a server/workstation one.
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