Core i7-660UE vs Core 2 Extreme X7900
Primary details
Comparing Core 2 Extreme X7900 and Core i7-660UE processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2680 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Laptop |
| Series | Intel Core 2 Extreme | Intel Core i7 |
| Power efficiency | 1.49 | no data |
| Architecture codename | Merom (2006−2008) | Arrandale (2010−2011) |
| Release date | 1 September 2007 (17 years ago) | 15 August 2010 (14 years ago) |
| Launch price (MSRP) | $851 | $301 |
Detailed specifications
Core 2 Extreme X7900 and Core i7-660UE 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) | 2 (Dual-core) |
| Threads | 2 | 4 |
| Base clock speed | 2.8 GHz | 1.33 GHz |
| Boost clock speed | 2.8 GHz | 2.4 GHz |
| Bus type | no data | DMI 1.0 |
| Bus rate | 800 MHz | 1 × 2.5 GT/s |
| Multiplier | no data | 10 |
| L1 cache | 128 KB | 128 KB |
| L2 cache | 4 MB | 512 KB |
| L3 cache | 0 KB | 4 MB (shared) |
| Chip lithography | 65 nm | 32 nm |
| Die size | 143 mm2 | 81 mm2 |
| Maximum core temperature | 100 °C | 105 °C |
| Number of transistors | no data | 382 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 1.1V-1.375V | no data |
Compatibility
Information on Core 2 Extreme X7900 and Core i7-660UE 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 (Uniprocessor) |
| Socket | PPGA478 | BGA1288 |
| Power consumption (TDP) | 44 Watt | 18 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme X7900 and Core i7-660UE. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| AES-NI | - | + |
| FMA | - | + |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | 1.0 |
| Hyper-Threading Technology | - | + |
| Idle States | - | + |
| Thermal Monitoring | - | + |
| Flex Memory Access | no data | + |
| Demand Based Switching | - | no data |
| PAE | no data | 36 Bit |
| FDI | no data | + |
| Fast Memory Access | no data | + |
| AMT | + | no data |
| FSB parity | - | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core 2 Extreme X7900 and Core i7-660UE technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Extreme X7900 and Core i7-660UE are enumerated here.
| VT-d | no data | + |
| VT-x | + | + |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X7900 and Core i7-660UE. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 | DDR3-800 |
| Maximum memory size | no data | 8.79 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 12.799 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® HD Graphics for Previous Generation Intel® Processors |
| Clear Video | no data | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 500 MHz |
Graphics interfaces
Available interfaces and connections of Core 2 Extreme X7900 and Core i7-660UE integrated GPUs.
| Number of displays supported | no data | 2 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Extreme X7900 and Core i7-660UE.
| PCIe version | no data | 2.0 |
| PCI Express lanes | no data | 16 |
Pros & cons summary
| Recency | 1 September 2007 | 15 August 2010 |
| Threads | 2 | 4 |
| Chip lithography | 65 nm | 32 nm |
| Power consumption (TDP) | 44 Watt | 18 Watt |
i7-660UE has an age advantage of 2 years, 100% more threads, a 103.1% more advanced lithography process, and 144.4% lower power consumption.
We couldn't decide between Core 2 Extreme X7900 and Core i7-660UE. We've got no test results to judge.
Should you still have questions on choice between Core 2 Extreme X7900 and Core i7-660UE, ask them in Comments section, and we shall answer.
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