Pentium 4 HT 651 vs Opteron X2 875
Primary details
Comparing Opteron X2 875 and Pentium 4 HT 651 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 | Desktop processor |
| Architecture codename | Egypt (2005−2006) | Cedar Mill (2006) |
| Release date | September 2005 (19 years ago) | January 2006 (18 years ago) |
Detailed specifications
Opteron X2 875 and Pentium 4 HT 651 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) | 1 (Single-Core) |
| Threads | 2 | 2 |
| Boost clock speed | 2.2 GHz | 3.4 GHz |
| L1 cache | 128 KB | 28 KB |
| L2 cache | 1 MB | 2 MB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 90 nm | 65 nm |
| Die size | no data | 81 mm2 |
| Number of transistors | 233 million | 188 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Opteron X2 875 and Pentium 4 HT 651 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 | 775 |
| Power consumption (TDP) | 95 Watt | 86 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Opteron X2 875 and Pentium 4 HT 651. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR1, DDR2, DDR3 |
Pros & cons summary
| Physical cores | 2 | 1 |
| Chip lithography | 90 nm | 65 nm |
| Power consumption (TDP) | 95 Watt | 86 Watt |
Opteron X2 875 has 100% more physical cores.
Pentium 4 HT 651, on the other hand, has a 38.5% more advanced lithography process, and 10.5% lower power consumption.
We couldn't decide between Opteron X2 875 and Pentium 4 HT 651. We've got no test results to judge.
Be aware that Opteron X2 875 is a server/workstation processor while Pentium 4 HT 651 is a desktop one.
Should you still have questions on choice between Opteron X2 875 and Pentium 4 HT 651, ask them in Comments section, and we shall answer.
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