Intel Core i7-6900K vs AMD Ryzen 9 7900X3D
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CPU comparison with benchmarks
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| Intel Core i7-6900K | AMD Ryzen 9 7900X3D | |
CPU comparisonIntel Core i7-6900K or AMD Ryzen 9 7900X3D - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.
The Intel Core i7-6900K has 8 cores with 16 threads and clocks with a maximum frequency of 3.70 GHz. Up to 128 GB of memory is supported in 4 memory channels. The Intel Core i7-6900K was released in Q2/2016. The AMD Ryzen 9 7900X3D has 12 cores with 24 threads and clocks with a maximum frequency of 5.60 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The AMD Ryzen 9 7900X3D was released in Q1/2023. |
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| Intel Core i7 Extreme Edition (24) | Family | AMD Ryzen 9 (35) |
| Intel Core i 6000 (24) | CPU group | AMD Ryzen 7000 (14) |
| 6 | Generation | 6 |
| Skylake S | Architecture | Raphael (Zen 4) |
| Desktop / Server | Segment | Desktop / Server |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe Intel Core i7-6900K has 8 CPU cores and can calculate 16 threads in parallel. The clock frequency of the Intel Core i7-6900K is 3.20 GHz (3.70 GHz) while the AMD Ryzen 9 7900X3D has 12 CPU cores and 24 threads can calculate simultaneously. The clock frequency of the AMD Ryzen 9 7900X3D is at 4.40 GHz (5.60 GHz). |
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| Intel Core i7-6900K | Characteristic | AMD Ryzen 9 7900X3D |
| 8 | Cores | 12 |
| 16 | Threads | 24 |
| normal | Core architecture | normal |
| Yes | Hyperthreading | Yes |
| Yes | Overclocking ? | No |
| 3.20 GHz | Frequency | 4.40 GHz |
| 3.70 GHz | Turbo Frequency (1 Core) | 5.60 GHz |
| -- | Turbo Frequency (All Cores) | 5.20 GHz |
Internal GraphicsThe Intel Core i7-6900K or AMD Ryzen 9 7900X3D has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die. |
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| no iGPU | GPU | AMD Radeon Graphics (Raphael) |
| GPU frequency | 0.40 GHz | |
| -- | GPU (Turbo) | 2.20 GHz |
| -- | GPU Generation | 9 |
| Technology | 5 nm | |
| Max. displays | 3 | |
| -- | Compute units | 2 |
| -- | Shader | 128 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| -- | Max. GPU Memory | 8 GB |
| -- | DirectX Version | 12 |
Hardware codec supportA photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos. |
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| no iGPU | GPU | AMD Radeon Graphics (Raphael) |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| No | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode / Encode |
| No | Codec VP8 | Decode / Encode |
| No | Codec AV1 | Decode |
| No | Codec AVC | Decode / Encode |
| No | Codec VC-1 | Decode |
| No | Codec JPEG | Decode / Encode |
Memory & PCIeThe Intel Core i7-6900K can use up to 128 GB of memory in 4 memory channels. The maximum memory bandwidth is 76.8 GB/s. The AMD Ryzen 9 7900X3D supports up to 128 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 83.2 GB/s. |
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| Intel Core i7-6900K | Characteristic | AMD Ryzen 9 7900X3D |
| DDR4-2400 | Memory | DDR5-5200 |
| 128 GB | Max. Memory | 128 GB |
| 4 (Quad Channel) | Memory channels | 2 (Dual Channel) |
| 76.8 GB/s | Max. Bandwidth | 83.2 GB/s |
| No | ECC | Yes |
| -- | L2 Cache | 12.00 MB |
| 20.00 MB | L3 Cache | 128.00 MB |
| 3.0 | PCIe version | 5.0 |
| 40 | PCIe lanes | 24 |
| 39.4 GB/s | PCIe Bandwidth | 94.5 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the Intel Core i7-6900K is 140 W, while the AMD Ryzen 9 7900X3D has a TDP of 120 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| Intel Core i7-6900K | Characteristic | AMD Ryzen 9 7900X3D |
| 140 W | TDP (PL1 / PBP) | 120 W |
| -- | TDP (PL2) | 162 W |
| -- | TDP up | -- |
| -- | TDP down | -- |
| -- | Tjunction max. | 89 °C |
Technical detailsThe Intel Core i7-6900K is manufactured in 14 nm and has 20.00 MB cache. The AMD Ryzen 9 7900X3D is manufactured in 5 nm and has a 140.00 MB cache. |
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| Intel Core i7-6900K | Characteristic | AMD Ryzen 9 7900X3D |
| 14 nm | Technology | 5 nm |
| Monolithic | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4.1, SSE4.2, AVX2 | ISA extensions | SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 |
| LGA 2011-3 | Socket | AM5 (LGA 1718) |
| VT-x, VT-x EPT, VT-d | Virtualization | AMD-V, SVM |
| Yes | AES-NI | Yes |
| Windows 10, Linux | Operating systems | Windows 10, Windows 11, Linux |
| Q2/2016 | Release date | Q1/2023 |
| -- | Release price | -- |
| show more data | show more data | |
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8C 16T @ 3.20 GHz (3.70 GHz) buy now on Amazon and save!
12C 24T @ 4.40 GHz (5.60 GHz) buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 3 CPU benchmarks
⌀ Multi core performance in 4 CPU benchmarks
Cinebench R23 (Single-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.60 GHz |
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Cinebench R23 (Multi-Core)
Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.20 GHz |
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Geekbench 5, 64bit (Single-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.60 GHz |
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Geekbench 5, 64bit (Multi-Core)
Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.20 GHz |
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Geekbench 6 (Single-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.60 GHz |
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Geekbench 6 (Multi-Core)
Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.20 GHz |
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Estimated results for PassMark CPU Mark
Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.20 GHz |
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Cinebench 2024 (Single-Core)
The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.60 GHz |
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Cinebench 2024 (Multi-Core)
The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
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Intel Core i7-6900K
8C 16T @ 3.70 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 5.60 GHz |
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iGPU - FP32 Performance (Single-precision GFLOPS)
The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
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Intel Core i7-6900K
@ 0.00 GHz |
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AMD Ryzen 9 7900X3D
AMD Radeon Graphics (Raphael) @ 2.20 GHz |
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CPU-Z Benchmark 17 (Multi-Core)
The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
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Intel Core i7-6900K
8C 16T @ 3.20 GHz |
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AMD Ryzen 9 7900X3D
12C 24T @ 4.40 GHz |
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CPU performance per watt (efficiency)
Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
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Intel Core i7-6900K
3.20 GHz |
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AMD Ryzen 9 7900X3D
27,084 CB R23 MC @ 115 W |
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Devices using this processor |
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| Intel Core i7-6900K | AMD Ryzen 9 7900X3D |
| Unknown | Unknown |
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