Ryzen Threadripper 3990X vs FX-6300
Aggregate performance score
Ryzen Threadripper 3990X outperforms FX-6300 by a whopping 1832% 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 | 2025 | 70 |
| Place by popularity | 74 | not in top-100 |
| Cost-effectiveness evaluation | 0.63 | 9.81 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | AMD Ryzen Threadripper |
| Power efficiency | 1.05 | 6.88 |
| Designer | AMD | AMD |
| Manufacturer | GlobalFoundries | TSMC |
| Architecture codename | Vishera (2012−2015) | Matisse (2019−2020) |
| Release date | 23 October 2012 (13 years ago) | 7 February 2020 (6 years ago) |
| Launch price (MSRP) | $132 | $3,999 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Ryzen Threadripper 3990X has 1457% better value for money than FX-6300.
Performance to price scatter graph
Detailed specifications
FX-6300 and Ryzen Threadripper 3990X 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 | 6 (Hexa-Core) | 64 (Tetrahexaconta-Core) |
| Threads | 6 | 128 |
| Base clock speed | 3.5 GHz | 2.9 GHz |
| Boost clock speed | 3.8 GHz | 4.3 GHz |
| Multiplier | no data | 29 |
| L1 cache | 288 KB | 96K (per core) |
| L2 cache | 6144 KB | 512K (per core) |
| L3 cache | 8192 KB | 256 MB |
| Chip lithography | 32 nm | 7 nm, 12 nm |
| Die size | 315 mm2 | 74 mm2 |
| Maximum core temperature | 71 °C | no data |
| Maximum case temperature (TCase) | no data | 95 °C |
| Number of transistors | 1,200 million | 3,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | - | + |
| P0 Vcore voltage | Min: 1.15 V - Max: 1.3875 V | no data |
Compatibility
Information on FX-6300 and Ryzen Threadripper 3990X 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 | AM3+ | TR4 |
| Power consumption (TDP) | 95 Watt | 280 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by FX-6300 and Ryzen Threadripper 3990X. You'll probably need this information if you require some particular technology.
| AES-NI | + | + |
| FMA | + | - |
| AVX | + | + |
| Precision Boost 2 | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by FX-6300 and Ryzen Threadripper 3990X are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by FX-6300 and Ryzen Threadripper 3990X. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3-1866 | DDR4-3200 |
| Maximum memory size | no data | 256 GB |
| Max memory channels | no data | 4 |
| Maximum memory bandwidth | no data | 102.403 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | - |
Peripherals
Specifications and connection of peripherals supported by FX-6300 and Ryzen Threadripper 3990X.
| PCIe version | 3.0 | 4.0 |
Synthetic benchmarks
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.
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.
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.
Pros & cons summary
| Performance score | 2.36 | 45.60 |
| Recency | 23 October 2012 | 7 February 2020 |
| Physical cores | 6 | 64 |
| Threads | 6 | 128 |
| Chip lithography | 32 nm | 7 nm |
| Power consumption (TDP) | 95 Watt | 280 Watt |
FX-6300 has 194.7% lower power consumption.
Ryzen Threadripper 3990X, on the other hand, has a 1832.2% higher aggregate performance score, an age advantage of 7 years, 966.7% more physical cores and 2033.3% more threads, and a 357.1% more advanced lithography process.
The AMD Ryzen Threadripper 3990X is our recommended choice as it beats the AMD FX-6300 in performance tests.
Other comparisons
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