AMD A8-6600K vs AMD Ryzen 9 4900U
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CPU comparison with benchmarks
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| AMD A8-6600K | AMD Ryzen 9 4900U | |
CPU comparisonAMD A8-6600K or AMD Ryzen 9 4900U - 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 AMD A8-6600K has 4 cores with 4 threads and clocks with a maximum frequency of 4.20 GHz. Up to GB of memory is supported in 2 memory channels. The AMD A8-6600K was released in Q2/2013. The AMD Ryzen 9 4900U has 8 cores with 16 threads and clocks with a maximum frequency of 4.40 GHz. The CPU supports up to 64 GB of memory in 2 memory channels. The AMD Ryzen 9 4900U was released in Q1/2020. |
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| AMD A (112) | Family | AMD Ryzen 9 (40) |
| AMD A8-6000 (4) | CPU group | AMD Ryzen 4000U (11) |
| 3 | Generation | 3 |
| Richland (Piledriver) | Architecture | Renoir (Zen 2) |
| Desktop / Server | Segment | Mobile |
| -- | Predecessor | -- |
| -- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD A8-6600K has 4 CPU cores and can calculate 4 threads in parallel. The clock frequency of the AMD A8-6600K is 3.90 GHz (4.20 GHz) while the AMD Ryzen 9 4900U has 8 CPU cores and 16 threads can calculate simultaneously. The clock frequency of the AMD Ryzen 9 4900U is at 2.00 GHz (4.40 GHz). |
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| AMD A8-6600K | Characteristic | AMD Ryzen 9 4900U |
| 4 | Cores | 8 |
| 4 | Threads | 16 |
| normal | Core architecture | normal |
| No | Hyperthreading | Yes |
| Yes | Overclocking ? | No |
| 3.90 GHz | Frequency | 2.00 GHz |
| 4.20 GHz | Turbo Frequency (1 Core) | 4.40 GHz |
| 4.20 GHz | Turbo Frequency (All Cores) | 3.40 GHz |
Integrated graphics (iGPU)The AMD A8-6600K or AMD Ryzen 9 4900U 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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| AMD Radeon HD 8570D | GPU | AMD Radeon RX Vega 8 (Renoir) |
| 0.84 GHz | GPU frequency | 0.40 GHz |
| -- | GPU (Turbo) | 1.75 GHz |
| 5 | GPU Generation | 9 |
| 32 nm | Technology | 7 nm |
| 2 | Max. displays | 3 |
| 4 | Compute units | 8 |
| 256 | Shader | 512 |
| No | Hardware Raytracing | No |
| No | Frame Generation | No |
| 2 GB | Max. GPU Memory | 8 GB |
| 11.2 | 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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| AMD Radeon HD 8570D | GPU | AMD Radeon RX Vega 8 (Renoir) |
| No | Codec h265 / HEVC (8 bit) | Decode / Encode |
| No | Codec h265 / HEVC (10 bit) | Decode / Encode |
| Decode | Codec h264 | Decode / Encode |
| No | Codec VP9 | Decode / Encode |
| No | Codec VP8 | Decode / Encode |
| No | Codec AV1 | No |
| Decode | Codec AVC | Decode / Encode |
| Decode | Codec VC-1 | Decode |
| Decode / Encode | Codec JPEG | Decode / Encode |
Memory & PCIeThe AMD A8-6600K can use up to GB of memory in 2 memory channels. The maximum memory bandwidth is 29.9 GB/s. The AMD Ryzen 9 4900U supports up to 64 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 51.2 GB/s. |
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| AMD A8-6600K | Characteristic | AMD Ryzen 9 4900U |
| DDR3-1866 | Memory | LPDDR4-4266, DDR4-3200 |
| Max. Memory | 64 GB | |
| 2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
| 29.9 GB/s | Max. Bandwidth | 51.2 GB/s |
| No | ECC | Yes |
| -- | L2 Cache | -- |
| 4.00 MB | L3 Cache | 8.00 MB |
| -- | PCIe version | 3.0 |
| -- | PCIe lanes | 12 |
| -- | PCIe Bandwidth | 11.8 GB/s |
Thermal ManagementThe thermal design power (TDP for short) of the AMD A8-6600K is 100 W, while the AMD Ryzen 9 4900U has a TDP of 15 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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| AMD A8-6600K | Characteristic | AMD Ryzen 9 4900U |
| 100 W | TDP (PL1 / PBP) | 15 W |
| -- | TDP (PL2) | -- |
| -- | TDP up | 25 W |
| -- | TDP down | 10 W |
| -- | Tjunction max. | 105 °C |
Technical detailsThe AMD A8-6600K is manufactured in 32 nm and has 4.00 MB cache. The AMD Ryzen 9 4900U is manufactured in 7 nm and has a 8.00 MB cache. |
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| AMD A8-6600K | Characteristic | AMD Ryzen 9 4900U |
| 32 nm | Technology | 7 nm |
| Unknown | Chip design | Chiplet |
| x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
| SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4 | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
| FM2 | Socket | FP6 |
| AMD-V | Virtualization | AMD-V, SVM |
| Yes | AES-NI | Yes |
| Windows 10, Linux | Operating systems | Windows 10, Windows 11, Linux |
| Q2/2013 | Release date | Q1/2020 |
| 85 $ | Release price | -- |
| show more data | show more data | |
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8C 16T @ 2.00 GHz (4.40 GHz) buy now on Amazon and save!
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Rate these processors
Average performance in benchmarks
⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 2 CPU benchmarks
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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 4.40 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 3.40 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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AMD A8-6600K
AMD Radeon HD 8570D @ 0.84 GHz |
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AMD Ryzen 9 4900U
AMD Radeon RX Vega 8 (Renoir) @ 1.75 GHz |
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Cinebench R15 (Single-Core)
Cinebench R15 is the successor of Cinebench 11.5 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 4.40 GHz |
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Cinebench R15 (Multi-Core)
Cinebench R15 is the successor of Cinebench 11.5 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 3.40 GHz |
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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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 4.40 GHz |
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Cinebench R20 (Single-Core)
Cinebench R20 is the successor of Cinebench R15 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 4.40 GHz |
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Cinebench R20 (Multi-Core)
Cinebench R20 is the successor of Cinebench R15 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 3.40 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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AMD A8-6600K
4C 4T @ 4.20 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 3.40 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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AMD A8-6600K
4C 4T @ 3.90 GHz |
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AMD Ryzen 9 4900U
8C 16T @ 2.00 GHz |
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Devices using this processor |
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| AMD A8-6600K | AMD Ryzen 9 4900U |
| Unknown | Unknown |
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