AMD Ryzen 9 7950X | AMD Athlon II X4 638 | |
CPU comparisonAMD Ryzen 9 7950X or AMD Athlon II X4 638 - 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 Ryzen 9 7950X has 16 cores with 32 threads and clocks with a maximum frequency of 5.70 GHz. Up to 128 GB of memory is supported in 2 memory channels. The AMD Ryzen 9 7950X was released in Q4/2022. The AMD Athlon II X4 638 has 4 cores with 4 threads and clocks with a maximum frequency of 2.70 GHz. The CPU supports up to 16 GB of memory in 2 memory channels. The AMD Athlon II X4 638 was released in Q1/2012. |
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AMD Ryzen 9 (40) | Family | AMD Athlon II (52) |
AMD Ryzen 7000 (14) | CPU group | AMD Athlon II X4 (Llano) (5) |
6 | Generation | 2 |
Raphael (Zen 4) | Architecture | Llano |
Desktop / Server | Segment | Desktop / Server |
AMD Ryzen 9 5950X | Predecessor | -- |
AMD Ryzen 9 9950X | Successor | -- |
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CPU Cores and Base FrequencyThe AMD Ryzen 9 7950X has 16 CPU cores and can calculate 32 threads in parallel. The clock frequency of the AMD Ryzen 9 7950X is 4.50 GHz (5.70 GHz) while the AMD Athlon II X4 638 has 4 CPU cores and 4 threads can calculate simultaneously. The clock frequency of the AMD Athlon II X4 638 is at 2.70 GHz. |
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AMD Ryzen 9 7950X | Characteristic | AMD Athlon II X4 638 |
16 | Cores | 4 |
32 | Threads | 4 |
normal | Core architecture | normal |
Yes | Hyperthreading | No |
Yes | Overclocking ? | No |
4.50 GHz | Frequency | 2.70 GHz |
5.70 GHz | Turbo Frequency (1 Core) | -- |
5.20 GHz | Turbo Frequency (All Cores) | -- |
Integrated graphics (iGPU)The AMD Ryzen 9 7950X or AMD Athlon II X4 638 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 Graphics (Raphael) | GPU | no iGPU |
0.40 GHz | GPU frequency | -- |
2.20 GHz | GPU (Turbo) | -- |
9 | GPU Generation | -- |
5 nm | Technology | |
3 | Max. displays | |
2 | Compute units | -- |
128 | Shader | -- |
No | Hardware Raytracing | No |
No | Frame Generation | No |
8 GB | Max. GPU Memory | -- |
12 | DirectX Version | -- |
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 Graphics (Raphael) | GPU | no iGPU |
Decode / Encode | Codec h265 / HEVC (8 bit) | No |
Decode / Encode | Codec h265 / HEVC (10 bit) | No |
Decode / Encode | Codec h264 | No |
Decode / Encode | Codec VP9 | No |
Decode / Encode | Codec VP8 | No |
Decode | Codec AV1 | No |
Decode / Encode | Codec AVC | No |
Decode | Codec VC-1 | No |
Decode / Encode | Codec JPEG | No |
Memory & PCIeThe AMD Ryzen 9 7950X can use up to 128 GB of memory in 2 memory channels. The maximum memory bandwidth is 83.2 GB/s. The AMD Athlon II X4 638 supports up to 16 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 21.3 GB/s. |
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AMD Ryzen 9 7950X | Characteristic | AMD Athlon II X4 638 |
DDR5-5200 | Memory | DDR3-1333 |
128 GB | Max. Memory | 16 GB |
2 (Dual Channel) | Memory channels | 2 (Dual Channel) |
83.2 GB/s | Max. Bandwidth | 21.3 GB/s |
Yes | ECC | No |
16.00 MB | L2 Cache | 4.00 MB |
64.00 MB | L3 Cache | -- |
5.0 | PCIe version | 2.0 |
24 | PCIe lanes | -- |
94.5 GB/s | PCIe Bandwidth | -- |
Thermal ManagementThe thermal design power (TDP for short) of the AMD Ryzen 9 7950X is 170 W, while the AMD Athlon II X4 638 has a TDP of 65 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently. |
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AMD Ryzen 9 7950X | Characteristic | AMD Athlon II X4 638 |
170 W | TDP (PL1 / PBP) | 65 W |
230 W | TDP (PL2) | -- |
-- | TDP up | -- |
-- | TDP down | -- |
95 °C | Tjunction max. | -- |
Technical detailsThe AMD Ryzen 9 7950X is manufactured in 5 nm and has 80.00 MB cache. The AMD Athlon II X4 638 is manufactured in 32 nm and has a 4.00 MB cache. |
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AMD Ryzen 9 7950X | Characteristic | AMD Athlon II X4 638 |
5 nm | Technology | 32 nm |
Chiplet | Chip design | Unknown |
x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 | ISA extensions | MMX, 3DNow!, SSE3, SSE4a |
AM5 (LGA 1718) | Socket | FM1 |
AMD-V, SVM | Virtualization | AMD-V |
Yes | AES-NI | No |
Windows 10, Windows 11, Linux | Operating systems | Windows 10, Linux |
Q4/2022 | Release date | Q1/2012 |
699 $ | Release price | -- |
show more data | show more data | |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
AMD Radeon Graphics (Raphael) @ 2.20 GHz |
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AMD Athlon II X4 638
@ 0.00 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 4.50 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.70 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
16C 32T @ 5.20 GHz |
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AMD Athlon II X4 638
4C 4T @ 2.70 GHz |
AMD Ryzen 9 7950X
38,657 CB R23 MC @ 197 W |
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AMD Athlon II X4 638
2.70 GHz |
Devices using this processor |
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AMD Ryzen 9 7950X | AMD Athlon II X4 638 |
Unknown | Unknown |