Atom E645C vs Xeon X5660
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 1817 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.05 | no data |
| Market segment | Server | Laptop |
| Power efficiency | 1.52 | no data |
| Designer | Intel | Intel |
| Manufacturer | Intel | Intel |
| Architecture codename | Westmere-EP (2010−2011) | Stellarton (2010) |
| Release date | 16 March 2010 (16 years ago) | 22 November 2010 (15 years ago) |
| Launch price (MSRP) | $33 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Performance to price scatter graph
Currently popular graphics cards are shown for comparison.
Detailed specifications
Basic parameters of Xeon X5660 and Atom E645C: 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 | 6 (Hexa-Core) | 1 (Single-Core) |
| Threads | 12 | 2 |
| Base clock speed | 2.8 GHz | no data |
| Boost clock speed | 3.2 GHz | 1 GHz |
| L1 cache | 64 KB (per core) | 64 KB (per core) |
| L2 cache | 256 KB (per core) | 512 KB (per core) |
| L3 cache | 12 MB (shared) | 0 KB |
| Chip lithography | 32 nm | 45 nm |
| Die size | 239 mm2 | 26 mm2 |
| Maximum core temperature | 81 °C | no data |
| Number of transistors | 1,170 million | 47 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
Compatibility
Information on Xeon X5660 and Atom E645C 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 | 2 | 1 |
| Socket | FCLGA1366,LGA1366 | Intel BGA1466 |
| Power consumption (TDP) | 95 Watt | 4 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Xeon X5660 and Atom E645C. You'll probably need this information if you require some particular technology.
| Instruction set extensions | Intel® SSE4.2 | no data |
| AES-NI | + | - |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | 1.0 | no data |
| Hyper-Threading Technology | + | + |
| Idle States | + | no data |
| Demand Based Switching | + | no data |
| PAE | 40 Bit | no data |
Security technologies
Xeon X5660 and Atom E645C technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Xeon X5660 and Atom E645C are enumerated here.
| VT-d | + | no data |
| VT-x | + | no data |
| EPT | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Xeon X5660 and Atom E645C. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR2 |
| Maximum memory size | 288 GB | no data |
| Max memory channels | 3 | no data |
| Maximum memory bandwidth | 32 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel GMA 600 |
Peripherals
Specifications and connection of peripherals supported by Xeon X5660 and Atom E645C.
| PCIe version | 2.0 | no data |
Pros & cons summary
| Recency | 16 March 2010 | 22 November 2010 |
| Physical cores | 6 | 1 |
| Threads | 12 | 2 |
| Chip lithography | 32 nm | 45 nm |
| Power consumption (TDP) | 95 Watt | 4 Watt |
Xeon X5660 has 500% more physical cores and 500% more threads, and a 41% more advanced lithography process.
Atom E645C, on the other hand, has an age advantage of 8 months, and 2275% lower power consumption.
We couldn't decide between Intel Xeon X5660 and Intel Atom E645C. We've got no test results to judge.
Be aware that Xeon X5660 is a server/workstation processor while Atom E645C is a notebook one.
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