Pentium D 945 vs Ryzen 7 1800X
Primary details
Comparing Ryzen 7 1800X and Pentium D 945 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 749 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 3.19 | no data |
| Market segment | Desktop processor | Desktop processor |
| Series | AMD Ryzen 7 | no data |
| Power efficiency | 10.26 | no data |
| Architecture codename | Zen (2017−2020) | Presler (2005−2007) |
| Release date | 22 February 2017 (7 years ago) | 23 July 2006 (18 years ago) |
| Launch price (MSRP) | $499 | $163 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Ryzen 7 1800X and Pentium D 945 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 | 8 (Octa-Core) | 2 (Dual-core) |
| Threads | 16 | 2 |
| Base clock speed | 3.6 GHz | 3.4 GHz |
| Boost clock speed | 4 GHz | 3.4 GHz |
| Bus rate | 4 × 8 GT/s | no data |
| Multiplier | 36 | no data |
| L1 cache | 768 KB | 16 KB (per core) |
| L2 cache | 4096 KB | 2 MB (per die) |
| L3 cache | 16384 KB | 0 KB |
| Chip lithography | 14 nm | 65 nm |
| Die size | 213 mm2 | 2x 81 mm2 |
| Maximum case temperature (TCase) | no data | 63 °C |
| Number of transistors | 4800 Million | 376 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
| VID voltage range | no data | 1.2V-1.3375V |
Compatibility
Information on Ryzen 7 1800X and Pentium D 945 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 (Uniprocessor) | 1 |
| Socket | AM4 | LGA775,PLGA775 |
| Power consumption (TDP) | 95 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Ryzen 7 1800X and Pentium D 945. You'll probably need this information if you require some particular technology.
| Instruction set extensions | XFR, FMA3, SSE 4.2, AVX2, SMT | no data |
| AES-NI | + | - |
| FMA | FMA3 | - |
| AVX | + | - |
| 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 | - |
| XFR | + | - |
| SenseMI | + | - |
Security technologies
Ryzen 7 1800X and Pentium D 945 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 Ryzen 7 1800X and Pentium D 945 are enumerated here.
| AMD-V | + | - |
| VT-d | no data | - |
| VT-x | no data | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Ryzen 7 1800X and Pentium D 945. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR4 | DDR1, DDR2, DDR3 |
| Maximum memory size | 64 GB | no data |
| Max memory channels | 2 | no data |
| Maximum memory bandwidth | 42.671 GB/s | no data |
| ECC memory support | + | - |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | - | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by Ryzen 7 1800X and Pentium D 945.
| PCIe version | n/a | no data |
| PCI Express lanes | 20 | no data |
Pros & cons summary
| Recency | 22 February 2017 | 23 July 2006 |
| Physical cores | 8 | 2 |
| Threads | 16 | 2 |
| Chip lithography | 14 nm | 65 nm |
Ryzen 7 1800X has an age advantage of 10 years, 300% more physical cores and 700% more threads, and a 364.3% more advanced lithography process.
We couldn't decide between Ryzen 7 1800X and Pentium D 945. We've got no test results to judge.
Should you still have questions on choice between Ryzen 7 1800X and Pentium D 945, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
