Performance per price, higher is better.
Pentium D 820 vs Phenom II X4 805
General info
Comparing Phenom II X4 805 and Pentium D 820 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2159 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Value for money | 4.93 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Pentium D |
| Architecture codename | Deneb (2009−2011) | Smithfield (2005) |
| Release date | February 2009 (15 years old) | May 2005 (18 years old) |
| Launch price (MSRP) | $174 | no data |
| Current price | $25 (0.1x MSRP) | $157 |
Value for money
no data
Technical specs
Phenom II X4 805 and Pentium D 820 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 | 4 (Quad-Core) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | no data | 2.8 GHz |
| Boost clock speed | 2.5 GHz | 2.8 GHz |
| Bus support | no data | 800 MHz |
| L1 cache | 128 KB (per core) | 28 KB |
| L2 cache | 512 KB (per core) | 2 MB |
| L3 cache | 4 MB (shared) | 0 KB |
| Chip lithography | 45 nm | 90 nm |
| Die size | 258 mm2 | 206 mm2 |
| Maximum core temperature | no data | 64 °C |
| Number of transistors | 758 million | 169 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
| VID voltage range | no data | 1.2V-1.4V |
Compatibility
Information on Phenom II X4 805 and Pentium D 820 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 |
| Socket | AM3 | PLGA775 |
| Power consumption (TDP) | 95 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X4 805 and Pentium D 820. You'll probably need this information if you require some particular technology.
| AES-NI | no data | - |
| Enhanced SpeedStep (EIST) | no data | - |
| Turbo Boost Technology | no data | - |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | no data | - |
| Demand Based Switching | no data | - |
| PAE | no data | 32 Bit |
| FSB parity | no data | - |
| Status | no data | Discontinued |
Security technologies
Phenom II X4 805 and Pentium D 820 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 Phenom II X4 805 and Pentium D 820 are enumerated here.
| VT-d | no data | - |
| VT-x | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 805 and Pentium D 820. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR1, DDR2, DDR3 |
| ECC memory support | 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%
Phenom II X4 805 outperforms Pentium D 820 by 293% in Passmark.
Advantages and disadvantages
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Chip lithography | 45 nm | 90 nm |
We couldn't decide between Phenom II X4 805 and Pentium D 820. We've got no test results to judge.
Should you still have questions on choice between Phenom II X4 805 and Pentium D 820, ask them in Comments section, and we shall answer.
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