Core 2 Extreme QX9775 vs Core 2 Extreme X7900
Primary details
Comparing Core 2 Extreme X7900 and Core 2 Extreme QX9775 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2709 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core 2 Extreme | no data |
| Power efficiency | 1.51 | no data |
| Architecture codename | Merom (2006−2008) | Yorkfield (2007−2009) |
| Release date | 1 September 2007 (17 years ago) | March 2008 (16 years ago) |
| Launch price (MSRP) | $851 | no data |
Detailed specifications
Core 2 Extreme X7900 and Core 2 Extreme QX9775 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) | 4 (Quad-Core) |
| Threads | 2 | 4 |
| Base clock speed | 2.8 GHz | 3.2 GHz |
| Boost clock speed | 2.8 GHz | 3.2 GHz |
| Bus rate | 800 MHz | 1600 MHz |
| L1 cache | 128 KB | 64K (per core) |
| L2 cache | 4 MB | 12 MB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 65 nm | 45 nm |
| Die size | 143 mm2 | 2x 107 mm2 |
| Maximum core temperature | 100 °C | no data |
| Maximum case temperature (TCase) | no data | 63 °C |
| Number of transistors | no data | 820 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | - | + |
| VID voltage range | 1.1V-1.375V | 0.85V-1.35V |
Compatibility
Information on Core 2 Extreme X7900 and Core 2 Extreme QX9775 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 | PPGA478 | LGA771 |
| Power consumption (TDP) | 44 Watt | 150 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme X7900 and Core 2 Extreme QX9775. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | - | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | - | - |
| AMT | + | no data |
| FSB parity | - | - |
Security technologies
Core 2 Extreme X7900 and Core 2 Extreme QX9775 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 2 Extreme QX9775 are enumerated here.
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X7900 and Core 2 Extreme QX9775. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1 | DDR2 |
Pros & cons summary
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Chip lithography | 65 nm | 45 nm |
| Power consumption (TDP) | 44 Watt | 150 Watt |
Core 2 Extreme X7900 has 240.9% lower power consumption.
Core 2 Extreme QX9775, on the other hand, has 100% more physical cores and 100% more threads, and a 44.4% more advanced lithography process.
We couldn't decide between Core 2 Extreme X7900 and Core 2 Extreme QX9775. We've got no test results to judge.
Be aware that Core 2 Extreme X7900 is a notebook processor while Core 2 Extreme QX9775 is a desktop one.
Should you still have questions on choice between Core 2 Extreme X7900 and Core 2 Extreme QX9775, ask them in Comments section, and we shall answer.
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