EPYC 7742 vs C-70
Primary details
Comparing C-70 and EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | 39 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 24.21 |
| Market segment | Laptop | Server |
| Series | AMD C-Series | AMD EPYC |
| Architecture codename | Ontario (2011−2012) | Zen 2 (2019−2020) |
| Release date | 1 September 2012 (11 years ago) | 7 August 2019 (4 years ago) |
| Launch price (MSRP) | no data | $6,950 |
| Current price | $107 | $1696 (0.2x MSRP) |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
C-70 and EPYC 7742 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 | 2 (Dual-core) | 64 (Tetrahexaconta-Core) |
| Threads | 2 | 128 |
| Base clock speed | 1 GHz | 2.25 GHz |
| Boost clock speed | 1.33 GHz | 3.4 GHz |
| L1 cache | 64K (per core) | 96K (per core) |
| L2 cache | 512K (per core) | 512K (per core) |
| L3 cache | 0 KB | 256 MB (shared) |
| Chip lithography | 40 nm | 7 nm, 14 nm |
| Die size | 75 mm2 | 192 mm2 |
| Number of transistors | no data | 4,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | + |
| Unlocked multiplier | No | Yes |
Compatibility
Information on C-70 and EPYC 7742 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 | 2 (Multiprocessor) |
| Socket | FT1 BGA 413-Ball | TR4 |
| Power consumption (TDP) | 9 Watt | 225 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by C-70 and EPYC 7742. You'll probably need this information if you require some particular technology.
| Instruction set extensions | MMX(+), SSE(1,2,3,3S,4A), AMD-V, Radeon HD 6290 (276-400 MHz) | no data |
| AES-NI | no data | + |
| AVX | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by C-70 and EPYC 7742 are enumerated here.
| AMD-V | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by C-70 and EPYC 7742. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 Single-channel | DDR4 Eight-channel |
| Maximum memory size | no data | 4 TiB |
| Max memory channels | no data | 8 |
| Maximum memory bandwidth | no data | 204.763 GB/s |
| ECC memory support | no data | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | AMD Radeon HD 6290 | no data |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
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.
Benchmark coverage: 68%
EPYC 7742 outperforms C-70 by 21863% in Passmark.
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.
Benchmark coverage: 42%
EPYC 7742 outperforms C-70 by 1116% in GeekBench 5 Single-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.
Benchmark coverage: 42%
EPYC 7742 outperforms C-70 by 6790% in GeekBench 5 Multi-Core.
Pros & cons summary
| Recency | 1 September 2012 | 7 August 2019 |
| Physical cores | 2 | 64 |
| Threads | 2 | 128 |
| Chip lithography | 40 nm | 7 nm |
| Power consumption (TDP) | 9 Watt | 225 Watt |
We couldn't decide between C-70 and EPYC 7742. We've got no test results to judge.
Be aware that C-70 is a notebook processor while EPYC 7742 is a server/workstation one.
Should you still have questions on choice between C-70 and EPYC 7742, ask them in Comments section, and we shall answer.
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