Core 2 Quad Q9400s vs Core 2 Duo P7550
Primary details
Comparing Core 2 Duo P7550 and Core 2 Quad Q9400s processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2843 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | Intel Core 2 Duo | no data |
| Power efficiency | 2.01 | no data |
| Architecture codename | Penryn (2008−2011) | Yorkfield (2007−2009) |
| Release date | 1 October 2009 (15 years ago) | 18 January 2009 (15 years ago) |
Detailed specifications
Core 2 Duo P7550 and Core 2 Quad Q9400s 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 | 2.26 GHz | 2.66 GHz |
| Boost clock speed | 2.26 GHz | 0.67 GHz |
| Bus rate | 1066 MHz | 1333 MHz |
| L1 cache | no data | 64 KB (per core) |
| L2 cache | 3 MB | 6 MB (shared) |
| L3 cache | 3 MB L2 Cache | 0 KB |
| Chip lithography | 45 nm | 45 nm |
| Die size | 107 mm2 | 2x 82 mm2 |
| Maximum core temperature | 90 °C | no data |
| Maximum case temperature (TCase) | no data | 76 °C |
| Number of transistors | 410 Million | 456 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 0.85V-1.3625V |
Compatibility
Information on Core 2 Duo P7550 and Core 2 Quad Q9400s 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 | PGA478 | LGA775 |
| Power consumption (TDP) | 25 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo P7550 and Core 2 Quad Q9400s. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | no data | - |
| Idle States | no data | + |
| Thermal Monitoring | - | + |
| Demand Based Switching | no data | - |
| FSB parity | no data | - |
Security technologies
Core 2 Duo P7550 and Core 2 Quad Q9400s technologies aimed at improving security, for example, by protecting against hacks.
| TXT | no data | + |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Duo P7550 and Core 2 Quad Q9400s are enumerated here.
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo P7550 and Core 2 Quad Q9400s. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | no data | DDR1, DDR2, DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | On certain motherboards (Chipset feature) |
Peripherals
Specifications and connection of peripherals supported by Core 2 Duo P7550 and Core 2 Quad Q9400s.
| PCIe version | no data | 2.0 |
Pros & cons summary
| Recency | 1 October 2009 | 18 January 2009 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Power consumption (TDP) | 25 Watt | 65 Watt |
Core 2 Duo P7550 has an age advantage of 8 months, and 160% lower power consumption.
Core 2 Quad Q9400s, on the other hand, has 100% more physical cores and 100% more threads.
We couldn't decide between Core 2 Duo P7550 and Core 2 Quad Q9400s. We've got no test results to judge.
Be aware that Core 2 Duo P7550 is a notebook processor while Core 2 Quad Q9400s is a desktop one.
Should you still have questions on choice between Core 2 Duo P7550 and Core 2 Quad Q9400s, ask them in Comments section, and we shall answer.
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