Pentium 4 HT 651 vs Pentium 4 1.9
Primary details
Comparing Pentium 4 1.9 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 | Desktop processor | Desktop processor |
| Architecture codename | Willamette (2000−2001) | Cedar Mill (2006) |
| Release date | August 2001 (23 years ago) | January 2006 (18 years ago) |
Detailed specifications
Pentium 4 1.9 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 | 1 (Single-Core) | 1 (Single-Core) |
| Threads | 1 | 2 |
| Boost clock speed | 1.9 GHz | 3.4 GHz |
| L1 cache | 8 KB | 28 KB |
| L2 cache | 256 KB | 2 MB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 180 nm | 65 nm |
| Die size | 217 mm2 | 81 mm2 |
| Maximum case temperature (TCase) | 73 °C | no data |
| Number of transistors | 42 million | 188 million |
| 64 bit support | - | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Pentium 4 1.9 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 | 1 | 1 |
| Socket | 423 | 775 |
| Power consumption (TDP) | 69 Watt | 86 Watt |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium 4 1.9 and Pentium 4 HT 651. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2 | DDR1, DDR2, DDR3 |
Pros & cons summary
| Threads | 1 | 2 |
| Chip lithography | 180 nm | 65 nm |
| Power consumption (TDP) | 69 Watt | 86 Watt |
Pentium 4 1.9 has 24.6% lower power consumption.
Pentium 4 HT 651, on the other hand, has 100% more threads, and a 176.9% more advanced lithography process.
We couldn't decide between Pentium 4 1.9 and Pentium 4 HT 651. We've got no test results to judge.
Should you still have questions on choice between Pentium 4 1.9 and Pentium 4 HT 651, 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.
