Ultra 5 245K vs Pentium 4 HT 661
Primary details
Comparing Pentium 4 HT 661 and Core Ultra 5 245K processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | 174 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 73.73 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | no data | 20.82 |
| Architecture codename | Cedar Mill (2006) | Arrow Lake-S (2024−2025) |
| Release date | 5 January 2006 (18 years ago) | 24 October 2024 (recently) |
| Launch price (MSRP) | $401 | $309 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Pentium 4 HT 661 and Core Ultra 5 245K 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) | 14 (Tetradeca-Core) |
| Threads | 2 | 14 |
| Base clock speed | 3.6 GHz | 4.2 GHz |
| Boost clock speed | 3.6 GHz | 5.2 GHz |
| Bus rate | no data | 159 MHz |
| L1 cache | 28 KB | 112 KB (per core) |
| L2 cache | 2 MB | 3 MB (per core) |
| L3 cache | 0 KB | 24 MB (shared) |
| Chip lithography | 65 nm | 3 nm |
| Die size | 81 mm2 | 243 mm2 |
| Maximum case temperature (TCase) | 69 °C | no data |
| Number of transistors | 188 million | 17,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
Compatibility
Information on Pentium 4 HT 661 and Core Ultra 5 245K 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 | 775 | 1851 |
| Power consumption (TDP) | 86 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Pentium 4 HT 661 and Core Ultra 5 245K. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| vPro | no data | + |
| Enhanced SpeedStep (EIST) | + | + |
| TSX | - | + |
| SIPP | - | + |
Security technologies
Pentium 4 HT 661 and Core Ultra 5 245K technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Pentium 4 HT 661 and Core Ultra 5 245K are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Pentium 4 HT 661 and Core Ultra 5 245K. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Arc Xe-LPG Graphics 64EU |
Peripherals
Specifications and connection of peripherals supported by Pentium 4 HT 661 and Core Ultra 5 245K.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 20 |
Pros & cons summary
| Recency | 5 January 2006 | 24 October 2024 |
| Physical cores | 1 | 14 |
| Threads | 2 | 14 |
| Chip lithography | 65 nm | 3 nm |
| Power consumption (TDP) | 86 Watt | 125 Watt |
Pentium 4 HT 661 has 45.3% lower power consumption.
Ultra 5 245K, on the other hand, has an age advantage of 18 years, 1300% more physical cores and 600% more threads, and a 2066.7% more advanced lithography process.
We couldn't decide between Pentium 4 HT 661 and Core Ultra 5 245K. We've got no test results to judge.
Should you still have questions on choice between Pentium 4 HT 661 and Core Ultra 5 245K, 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.
