Xeon 5040 vs Opteron 856
Primary details
Comparing Opteron 856 and Xeon 5040 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Server | Server |
| Architecture codename | Athens (2003−2006) | Dempsey (2006) |
| Release date | April 2006 (18 years ago) | May 2006 (18 years ago) |
Detailed specifications
Opteron 856 and Xeon 5040 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 | 1 (Single-Core) | 2 (Dual-core) |
| Threads | 1 | 4 |
| Base clock speed | no data | 2.83 GHz |
| Boost clock speed | 3 GHz | 2.83 GHz |
| L1 cache | 128 KB | 0 KB |
| L2 cache | 1 MB | 2 MB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 90 nm | 65 nm |
| Maximum core temperature | no data | 67 °C |
| Number of transistors | 106 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 1.075V-1.35V |
Compatibility
Information on Opteron 856 and Xeon 5040 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 | 8 | 1 |
| Socket | 940 | PLGA771 |
| Power consumption (TDP) | 92 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Opteron 856 and Xeon 5040. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | no data | + |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | + |
| Idle States | no data | - |
| Demand Based Switching | no data | - |
| PAE | no data | 32 Bit |
| FSB parity | no data | + |
Security technologies
Opteron 856 and Xeon 5040 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 Opteron 856 and Xeon 5040 are enumerated here.
| VT-x | no data | + |
| EPT | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Opteron 856 and Xeon 5040. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR2 |
Pros & cons summary
| Physical cores | 1 | 2 |
| Threads | 1 | 4 |
| Chip lithography | 90 nm | 65 nm |
| Power consumption (TDP) | 92 Watt | 95 Watt |
Opteron 856 has 3.3% lower power consumption.
Xeon 5040, on the other hand, has 100% more physical cores and 300% more threads, and a 38.5% more advanced lithography process.
We couldn't decide between Opteron 856 and Xeon 5040. We've got no test results to judge.
Should you still have questions on choice between Opteron 856 and Xeon 5040, ask them in Comments section, and we shall answer.
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