Pentium III 800 vs Phenom II X4 820
Primary details
Comparing Phenom II X4 820 and Pentium III 800 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2275 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.10 | no data |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 1.30 | no data |
| Architecture codename | Deneb (2009−2011) | Coppermine T (2000) |
| Release date | 1 September 2009 (15 years ago) | no data |
| Launch price (MSRP) | $90 | no data |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Phenom II X4 820 and Pentium III 800 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) | 1 (Single-Core) |
| Threads | 4 | 1 |
| Base clock speed | 2.8 GHz | no data |
| Boost clock speed | 2.8 GHz | 0.8 GHz |
| L1 cache | 128 KB (per core) | 8 KB |
| L2 cache | 512 KB (per core) | 256 KB |
| L3 cache | 4 MB (shared) | 0 KB |
| Chip lithography | 45 nm | 180 nm |
| Die size | 258 mm2 | 80 mm2 |
| Maximum case temperature (TCase) | no data | 69 °C |
| Number of transistors | 758 million | 44 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
Compatibility
Information on Phenom II X4 820 and Pentium III 800 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 | 1 |
| Socket | AM3 | 370 |
| Power consumption (TDP) | 95 Watt | 38 Watt |
Virtualization technologies
Virtual machine speed-up technologies supported by Phenom II X4 820 and Pentium III 800 are enumerated here.
| AMD-V | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X4 820 and Pentium III 800. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | no data |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Peripherals
Specifications and connection of peripherals supported by Phenom II X4 820 and Pentium III 800.
| PCIe version | 2.0 | no data |
Pros & cons summary
| Physical cores | 4 | 1 |
| Threads | 4 | 1 |
| Chip lithography | 45 nm | 180 nm |
| Power consumption (TDP) | 95 Watt | 38 Watt |
Phenom II X4 820 has 300% more physical cores and 300% more threads, and a 300% more advanced lithography process.
Pentium III 800, on the other hand, has 150% lower power consumption.
We couldn't decide between Phenom II X4 820 and Pentium III 800. We've got no test results to judge.
Should you still have questions on choice between Phenom II X4 820 and Pentium III 800, ask them in Comments section, and we shall answer.
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