Core i9-9900KF vs Ryzen Threadripper 3990X
Aggregate performance score
Ryzen Threadripper 3990X outperforms i9-9900KF by a whopping 336% based on our aggregate benchmark results.
Primary details
Comparing Ryzen Threadripper 3990X and Core i9-9900KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 28 | 614 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 12.87 | 15.47 |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen Threadripper | Intel Core i9 |
| Architecture codename | Matisse (2019−2020) | Coffee Lake-R (2018−2019) |
| Release date | 7 February 2020 (4 years ago) | 8 January 2019 (5 years ago) |
| Launch price (MSRP) | $3,999 | $488 |
| Current price | $3550 (0.9x MSRP) | $343 (0.7x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
i9-9900KF has 20% better value for money than Ryzen Threadripper 3990X.
Detailed specifications
Ryzen Threadripper 3990X and Core i9-9900KF 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 | 64 (Tetrahexaconta-Core) | 8 (Octa-Core) |
| Threads | 128 | 16 |
| Base clock speed | 2.9 GHz | 3.6 GHz |
| Boost clock speed | 4.3 GHz | 5 GHz |
| Bus support | no data | 4 × 8 GT/s |
| L1 cache | 96K (per core) | 64K (per core) |
| L2 cache | 512K (per core) | 256K (per core) |
| L3 cache | 256 MB | 16 MB (shared) |
| Chip lithography | 7 nm, 12 nm | 14 nm |
| Die size | 74 mm2 | no data |
| Maximum core temperature | no data | 100 °C |
| Maximum case temperature (TCase) | 95 °C | 72 °C |
| Number of transistors | 3,800 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | + | + |
| Unlocked multiplier | Yes | Yes |
Compatibility
Information on Ryzen Threadripper 3990X and Core i9-9900KF 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 | TR4 | FCLGA1151 |
| Power consumption (TDP) | 280 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen Threadripper 3990X and Core i9-9900KF. 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 |
| AES-NI | + | + |
| AVX | + | + |
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | 2.0 |
| Hyper-Threading Technology | no data | + |
| TSX | no data | + |
| Idle States | no data | + |
| Thermal Monitoring | no data | + |
| SIPP | no data | - |
| Status | no data | Discontinued |
Security technologies
Ryzen Threadripper 3990X and Core i9-9900KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | - |
| EDB | no data | + |
| Secure Key | no data | + |
| MPX | no data | + |
| Identity Protection | no data | + |
| SGX | no data | Yes with Intel® ME |
| OS Guard | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Ryzen Threadripper 3990X and Core i9-9900KF are enumerated here.
| AMD-V | + | no data |
| VT-d | no data | + |
| VT-x | no data | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen Threadripper 3990X and Core i9-9900KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4-3200 | DDR4-2666 |
| Maximum memory size | 256 GB | 128 GB |
| Max memory channels | 4 | 2 |
| Maximum memory bandwidth | 102.403 GB/s | 41.6 GB/s |
| ECC memory support | + | - |
Peripherals
Specifications and connection of peripherals supported by Ryzen Threadripper 3990X and Core i9-9900KF.
| PCIe version | 4.0 | 3.0 |
| PCI Express lanes | no data | 16 |
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.
Ryzen Threadripper 3990X outperforms Core i9-9900KF by 336% based on our aggregate benchmark results.
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.
Benchmark coverage: 68%
Ryzen Threadripper 3990X outperforms Core i9-9900KF by 336% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core i9-9900KF outperforms Ryzen Threadripper 3990X by 8% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Ryzen Threadripper 3990X outperforms Core i9-9900KF by 74% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 51.65 | 11.84 |
| Recency | 7 February 2020 | 8 January 2019 |
| Physical cores | 64 | 8 |
| Threads | 128 | 16 |
| Cost | $3999 | $488 |
| Chip lithography | 7 nm | 14 nm |
| Power consumption (TDP) | 280 Watt | 95 Watt |
The Ryzen Threadripper 3990X is our recommended choice as it beats the Core i9-9900KF in performance tests.
Should you still have questions on choice between Ryzen Threadripper 3990X and Core i9-9900KF, 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.
