AMD Phenom II X4 905e | AMD EPYC 7451 | |
CPU comparisonIn this CPU comparison, we compare the AMD Phenom II X4 905e and the AMD EPYC 7451 and use benchmarks to check which processor is faster.
We compare the AMD Phenom II X4 905e 4 core processor released in Q1/2009 with the AMD EPYC 7451 which has 24 CPU cores and was introduced in Q3/2017. |
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AMD Phenom II (52) | Family | AMD EPYC (129) |
AMD Phenom II - 800/900 (23) | CPU group | AMD EPYC 7001 (12) |
4 | Generation | 1 |
Deneb (K10) | Architecture | Naples (Zen) |
Desktop / Server | Segment | Desktop / Server |
-- | Predecessor | -- |
-- | Successor | -- |
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CPU Cores and Base FrequencyThe AMD Phenom II X4 905e is a 4 core processor with a clock frequency of 2.50 GHz. The processor can compute 4 threads at the same time. The AMD EPYC 7451 clocks with 2.30 GHz (3.20 GHz), has 24 CPU cores and can calculate 48 threads in parallel. |
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AMD Phenom II X4 905e | Characteristic | AMD EPYC 7451 |
4 | Cores | 24 |
4 | Threads | 48 |
normal | Core architecture | normal |
No | Hyperthreading | Yes |
Yes | Overclocking ? | No |
2.50 GHz | Frequency | 2.30 GHz |
-- | Turbo Frequency (1 Core) | 3.20 GHz |
-- | Turbo Frequency (All Cores) | 2.90 GHz |
Memory & PCIeUp to GB of memory in a maximum of 2 memory channels is supported by the AMD Phenom II X4 905e, while the AMD EPYC 7451 supports a maximum of GB of memory with a maximum memory bandwidth of 170.6 GB/s enabled. |
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AMD Phenom II X4 905e | Characteristic | AMD EPYC 7451 |
DDR3-1333, DDR2-1066 | Memory | DDR4-2666 |
Max. Memory | ||
2 (Dual Channel) | Memory channels | 8 (Octa Channel) |
21.3 GB/s | Max. Bandwidth | 170.6 GB/s |
No | ECC | Yes |
-- | L2 Cache | -- |
6.00 MB | L3 Cache | 64.00 MB |
-- | PCIe version | 3.0 |
-- | PCIe lanes | 128 |
-- | PCIe Bandwidth | 126.1 GB/s |
Thermal ManagementThe AMD Phenom II X4 905e has a TDP of 65 W. The TDP of the AMD EPYC 7451 is 180 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution. |
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AMD Phenom II X4 905e | Characteristic | AMD EPYC 7451 |
65 W | TDP (PL1 / PBP) | 180 W |
-- | TDP (PL2) | -- |
-- | TDP up | -- |
-- | TDP down | -- |
-- | Tjunction max. | -- |
Technical detailsThe AMD Phenom II X4 905e has 6.00 MB cache and is manufactured in 45 nm. The cache of AMD EPYC 7451 is at 64.00 MB. The processor is manufactured in 14 nm. |
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AMD Phenom II X4 905e | Characteristic | AMD EPYC 7451 |
45 nm | Technology | 14 nm |
Unknown | Chip design | Chiplet |
x86-64 (64 bit) | Instruction set (ISA) | x86-64 (64 bit) |
SSE3, SSE4a | ISA extensions | SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 |
AM3 | Socket | SP3 |
AMD-V | Virtualization | AMD-V, SVM |
No | AES-NI | Yes |
Windows 10, Linux | Operating systems | Windows 10, Linux |
Q1/2009 | Release date | Q3/2017 |
-- | Release price | 2400 $ |
show more data | show more data | |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 2.90 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 3.20 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 2.90 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 3.20 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 2.90 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 3.20 GHz |
AMD Phenom II X4 905e
4C 4T @ 2.50 GHz |
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AMD EPYC 7451
24C 48T @ 2.90 GHz |
Devices using this processor |
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AMD Phenom II X4 905e | AMD EPYC 7451 |
Unknown | Unknown |