EPYC 9655P vs i9-9900K
Aggregate performance score
EPYC 9655P outperforms Core i9-9900K by a whopping 770% based on our aggregate benchmark results.
Primary details
Comparing Core i9-9900K and EPYC 9655P processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 684 | 1 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 7.97 | 2.62 |
| Market segment | Desktop processor | Server |
| Series | Core i9 (Desktop) | no data |
| Power efficiency | 11.39 | 23.54 |
| Architecture codename | Coffee Lake-R (2018−2019) | Turin (2024) |
| Release date | 19 October 2018 (6 years ago) | 10 October 2024 (less than a year ago) |
| Launch price (MSRP) | $488 | $10,811 |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-9900K has 204% better value for money than EPYC 9655P.
Detailed specifications
Core i9-9900K and EPYC 9655P 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) | 96 |
| Threads | 16 | 192 |
| Base clock speed | 3.6 GHz | 2.6 GHz |
| Boost clock speed | 5 GHz | 4.5 GHz |
| Bus type | DMI 3.0 | no data |
| Bus rate | 4 × 8 GT/s | no data |
| L1 cache | 64K (per core) | 80 KB (per core) |
| L2 cache | 256K (per core) | 1 MB (per core) |
| L3 cache | 16 MB (shared) | 384 MB (shared) |
| Chip lithography | 14 nm | 4 nm |
| Die size | 178 mm2 | 12x 70.6 mm2 |
| Maximum core temperature | 100 °C | no data |
| Maximum case temperature (TCase) | 72 °C | no data |
| Number of transistors | no data | 99,780 million |
| 64 bit support | + | + |
| Windows 11 compatibility | + | no data |
| Unlocked multiplier | + | - |
Compatibility
Information on Core i9-9900K and EPYC 9655P 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 | LGA-1151 | SP5 |
| Power consumption (TDP) | 95 Watt | 400 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i9-9900K and EPYC 9655P. 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 | + | + |
| vPro | + | no data |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | 2.0 | no data |
| Hyper-Threading Technology | + | no data |
| TSX | + | - |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| SIPP | + | - |
| Precision Boost 2 | no data | + |
Security technologies
Core i9-9900K and EPYC 9655P technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
| Secure Key | + | no data |
| MPX | + | - |
| Identity Protection | + | - |
| SGX | Yes with Intel® ME | no data |
| OS Guard | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core i9-9900K and EPYC 9655P 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 i9-9900K and EPYC 9655P. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR5 |
| Maximum memory size | 128 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 44.668 GB/s | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | Intel UHD Graphics 630 | N/A |
| Max video memory | 64 GB | no data |
| Quick Sync Video | + | - |
| Clear Video | + | no data |
| Clear Video HD | + | no data |
| Graphics max frequency | 1.2 GHz | no data |
| InTru 3D | + | no data |
Graphics interfaces
Available interfaces and connections of Core i9-9900K and EPYC 9655P integrated GPUs.
| Number of displays supported | 3 | no data |
Graphics image quality
Maximum display resolutions supported by Core i9-9900K and EPYC 9655P integrated GPUs, including resolutions over different interfaces.
| 4K resolution support | + | no data |
| Max resolution over HDMI 1.4 | 4096 x 2304@24Hz | no data |
| Max resolution over eDP | 4096 x 2304@60Hz | no data |
| Max resolution over DisplayPort | 4096 x 2304@60Hz | no data |
Graphics API support
APIs supported by Core i9-9900K and EPYC 9655P 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 i9-9900K and EPYC 9655P.
| PCIe version | 3.0 | 5.0 |
| PCI Express lanes | 16 | 128 |
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 | 11.49 | 100.00 |
| Recency | 19 October 2018 | 10 October 2024 |
| Physical cores | 8 | 96 |
| Threads | 16 | 192 |
| Chip lithography | 14 nm | 4 nm |
| Power consumption (TDP) | 95 Watt | 400 Watt |
i9-9900K has 321.1% lower power consumption.
EPYC 9655P, on the other hand, has a 770.3% higher aggregate performance score, an age advantage of 5 years, 1100% more physical cores and 1100% more threads, and a 250% more advanced lithography process.
The EPYC 9655P is our recommended choice as it beats the Core i9-9900K in performance tests.
Note that Core i9-9900K is a desktop processor while EPYC 9655P is a server/workstation one.
Should you still have questions on choice between Core i9-9900K and EPYC 9655P, ask them in Comments section, and we shall answer.
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