Core Ultra 7 265KF vs Core 2 Extreme X7800
Aggregate performance score
Core Ultra 7 265KF outperforms Core 2 Extreme X7800 by a whopping 5345% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Extreme X7800 and Core Ultra 7 265KF processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2689 | 73 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 100.00 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core 2 Extreme | no data |
| Power efficiency | 1.54 | 29.54 |
| Architecture codename | Merom XE (2007) | Arrow Lake-S (2024−2025) |
| Release date | 17 July 2007 (17 years ago) | 24 October 2024 (recently) |
| Launch price (MSRP) | $851 | $379 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Extreme X7800 and Core Ultra 7 265KF 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 | 2 (Dual-core) | 20 (Icosa-Core) |
| Threads | 2 | 20 |
| Base clock speed | 2.6 GHz | 3.9 GHz |
| Boost clock speed | 2.6 GHz | 5.5 GHz |
| Bus rate | 800 MHz | no data |
| L1 cache | 128 KB | 112 KB (per core) |
| L2 cache | 4 MB | 3 MB (per core) |
| L3 cache | 4 MB L2 Cache | 30 MB (shared) |
| Chip lithography | 65 nm | 3 nm |
| Die size | 143 mm2 | 243 mm2 |
| Maximum core temperature | 100 °C | no data |
| Number of transistors | 291 Million | 17,800 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | no data |
| Unlocked multiplier | - | + |
| VID voltage range | 1.1V-1.375V | no data |
Compatibility
Information on Core 2 Extreme X7800 and Core Ultra 7 265KF 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 | no data | 1 |
| Socket | PPGA478 | 1851 |
| Power consumption (TDP) | 44 Watt | 125 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme X7800 and Core Ultra 7 265KF. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| AVX | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| TSX | - | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Core 2 Extreme X7800 and Core Ultra 7 265KF technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | + |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Extreme X7800 and Core Ultra 7 265KF are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X7800 and Core Ultra 7 265KF. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR5 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | N/A |
Peripherals
Specifications and connection of peripherals supported by Core 2 Extreme X7800 and Core Ultra 7 265KF.
| PCIe version | no data | 5.0 |
| PCI Express lanes | no data | 20 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Pros & cons summary
| Performance score | 0.73 | 39.75 |
| Recency | 17 July 2007 | 24 October 2024 |
| Physical cores | 2 | 20 |
| Threads | 2 | 20 |
| Chip lithography | 65 nm | 3 nm |
| Power consumption (TDP) | 44 Watt | 125 Watt |
Core 2 Extreme X7800 has 184.1% lower power consumption.
Ultra 7 265KF, on the other hand, has a 5345.2% higher aggregate performance score, an age advantage of 17 years, 900% more physical cores and 900% more threads, and a 2066.7% more advanced lithography process.
The Core Ultra 7 265KF is our recommended choice as it beats the Core 2 Extreme X7800 in performance tests.
Be aware that Core 2 Extreme X7800 is a notebook processor while Core Ultra 7 265KF is a desktop one.
Should you still have questions on choice between Core 2 Extreme X7800 and Core Ultra 7 265KF, 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.
