i7-990X Extreme Edition vs i7-975 Extreme Edition
Primary details
Comparing Core i7-975 Extreme Edition and Core i7-990X Extreme Edition processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Series | Intel Core i7EE | Intel Core i7EE |
| Architecture codename | Nehalem (2008−2010) | Westmere (2010−2011) |
| Release date | 2 June 2009 (15 years ago) | 13 February 2011 (13 years ago) |
Detailed specifications
Core i7-975 Extreme Edition and Core i7-990X 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) | 6 (Hexa-Core) |
| Threads | 8 | 12 |
| Boost clock speed | 3.33 GHz | 3.46 GHz |
| Bus type | QPI | QPI |
| Bus rate | 6.4 GT/s | 6.4 GT/s |
| Multiplier | 25 | 26 |
| L2 cache | 1 MB | 1.5 MB |
| L3 cache | 8 MB | 12 MB |
| Chip lithography | 45 nm | 32 nm |
| Die size | 263 mm2 | 239 mm2 |
| Number of transistors | 731 Million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
Compatibility
Information on Core i7-975 Extreme Edition and Core i7-990X 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 (Uniprocessor) | 1 (Uniprocessor) |
| Power consumption (TDP) | 130 Watt | 130 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core i7-975 Extreme Edition and Core i7-990X Extreme Edition. You'll probably need this information if you require some particular technology.
| AES-NI | - | + |
| Enhanced SpeedStep (EIST) | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core i7-975 Extreme Edition and Core i7-990X Extreme Edition. Depending on the motherboard, higher memory frequencies may be supported.
| Maximum memory size | 24 GB | 24 GB |
Pros & cons summary
| Recency | 2 June 2009 | 13 February 2011 |
| Physical cores | 4 | 6 |
| Threads | 8 | 12 |
| Chip lithography | 45 nm | 32 nm |
i7-990X Extreme Edition has an age advantage of 1 year, 50% more physical cores and 50% more threads, and a 40.6% more advanced lithography process.
We couldn't decide between Core i7-975 Extreme Edition and Core i7-990X Extreme Edition. We've got no test results to judge.
Should you still have questions on choice between Core i7-975 Extreme Edition and Core i7-990X Extreme Edition, ask them in Comments section, and we shall answer.
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