Atom Z605 vs Pentium D 820
Contents
Primary details
Comparing processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 3420 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | Pentium D | Intel Atom |
| Power efficiency | 0.13 | no data |
| Designer | Intel | Intel |
| Manufacturer | no data | Intel |
| Architecture codename | Smithfield (2005) | Lincroft (2010−2011) |
| Release date | May 2005 (21 years ago) | 4 May 2010 (16 years ago) |
Detailed specifications
Basic parameters of Pentium D 820 and Atom Z605: 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 | 1 |
| Base clock speed | 2.8 GHz | no data |
| Boost clock speed | 2.8 GHz | 1 GHz |
| Bus type | no data | cDMI |
| Bus rate | 800 MHz | 400 MT/s |
| Multiplier | no data | 10 |
| L1 cache | 28 KB | 64K (per core) |
| L2 cache | 2 MB | 512 KB (per core) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 90 nm | 45 nm |
| Die size | 206 mm2 | 65.2526 mm2 |
| Maximum core temperature | 64 °C | no data |
| Number of transistors | 169 million | 140 million |
| 64 bit support | + | - |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.2V-1.4V | no data |
Compatibility
Information on Pentium D 820 and Atom Z605 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 (Uniprocessor) |
| Socket | PLGA775 | Intel BGA 518 |
| Power consumption (TDP) | 95 Watt | 2 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium D 820 and Atom Z605. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | - | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Demand Based Switching | - | no data |
| PAE | 32 Bit | no data |
| FSB parity | - | no data |
Security technologies
Pentium D 820 and Atom Z605 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 Pentium D 820 and Atom Z605 are enumerated here.
| VT-d | - | no data |
| VT-x | - | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Atom Z605. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR1, DDR2 |
| Maximum memory size | no data | 2 GB |
| Max memory channels | no data | 1 |
| Maximum memory bandwidth | no data | 3.2 GB/s |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | PowerVR SGX535 |
Pros & cons summary
| Physical cores | 2 | 1 |
| Threads | 2 | 1 |
| Chip lithography | 90 nm | 45 nm |
| Power consumption (TDP) | 95 Watt | 2 Watt |
Pentium D 820 has 100% more physical cores and 100% more threads.
Atom Z605, on the other hand, has a 100% more advanced lithography process, and 4650% lower power consumption.
We couldn't decide between Intel Pentium D 820 and Intel Atom Z605. We've got no test results to judge.
Note that Pentium D 820 is a desktop processor while Atom Z605 is a notebook one.
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