Core i7-975 Extreme Edition vs Core 2 Extreme QX9775
Primary details
Comparing Core 2 Extreme QX9775 and Core i7-975 Extreme Edition processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Intel Core i7EE |
| Architecture codename | Yorkfield (2007−2009) | Nehalem (2008−2010) |
| Release date | March 2008 (16 years ago) | 2 June 2009 (15 years ago) |
Detailed specifications
Core 2 Extreme QX9775 and Core i7-975 Extreme Edition 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 | 4 (Quad-Core) | 4 (Quad-Core) |
| Threads | 4 | 8 |
| Base clock speed | 3.2 GHz | no data |
| Boost clock speed | 3.2 GHz | 3.33 GHz |
| Bus type | no data | QPI |
| Bus rate | 1600 MHz | 6.4 GT/s |
| Multiplier | no data | 25 |
| L1 cache | 64K (per core) | no data |
| L2 cache | 12 MB (shared) | 1 MB |
| L3 cache | 0 KB | 8 MB |
| Chip lithography | 45 nm | 45 nm |
| Die size | 2x 107 mm2 | 263 mm2 |
| Maximum case temperature (TCase) | 63 °C | no data |
| Number of transistors | 820 million | 731 Million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | + | - |
| VID voltage range | 0.85V-1.35V | no data |
Compatibility
Information on Core 2 Extreme QX9775 and Core i7-975 Extreme Edition 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 | LGA771 | no data |
| Power consumption (TDP) | 150 Watt | 130 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Extreme QX9775 and Core i7-975 Extreme Edition. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | - |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
| Status | Discontinued | no data |
Security technologies
Core 2 Extreme QX9775 and Core i7-975 Extreme Edition technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Extreme QX9775 and Core i7-975 Extreme Edition are enumerated here.
| VT-x | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX9775 and Core i7-975 Extreme Edition. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR2 | no data |
| Maximum memory size | no data | 24 GB |
Pros & cons summary
| Threads | 4 | 8 |
| Power consumption (TDP) | 150 Watt | 130 Watt |
i7-975 Extreme Edition has 100% more threads, and 15.4% lower power consumption.
We couldn't decide between Core 2 Extreme QX9775 and Core i7-975 Extreme Edition. We've got no test results to judge.
Should you still have questions on choice between Core 2 Extreme QX9775 and Core i7-975 Extreme Edition, ask them in Comments section, and we shall answer.
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