Core 2 Quad Q9550 vs Core 2 Duo E7400
Aggregate performance score
Core 2 Quad Q9550 outperforms Core 2 Duo E7400 by a whopping 125% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Duo E7400 and Core 2 Quad Q9550 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2638 | 2052 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 1.01 | 2.80 |
| Market segment | Desktop processor | Desktop processor |
| Series | no data | Core 2 Quad (Desktop) |
| Architecture codename | Wolfdale (2008−2010) | Yorkfield (2007−2009) |
| Release date | October 2008 (15 years ago) | no data |
| Current price | $91 | $54 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Core 2 Quad Q9550 has 177% better value for money than Core 2 Duo E7400.
Detailed specifications
Core 2 Duo E7400 and Core 2 Quad Q9550 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 | no data |
| Boost clock speed | 2.8 GHz | 2.83 GHz |
| Bus support | no data | 1333 MHz |
| L1 cache | 64 KB | no data |
| L2 cache | 3 MB (shared) | 12288 KB |
| L3 cache | 0 KB | no data |
| Chip lithography | 45 nm | 45 nm |
| Die size | 82 mm2 | no data |
| Maximum core temperature | 74 °C | no data |
| Maximum case temperature (TCase) | 74 °C | no data |
| Number of transistors | 228 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Duo E7400 and Core 2 Quad Q9550 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 | no data |
| Socket | LGA775 | LGA775 |
| Power consumption (TDP) | 65 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Duo E7400 and Core 2 Quad Q9550. You'll probably need this information if you require some particular technology.
| AES-NI | - | no data |
| Enhanced SpeedStep (EIST) | + | no data |
| Turbo Boost Technology | - | no data |
| Hyper-Threading Technology | - | no data |
| Idle States | + | no data |
| Thermal Monitoring | + | no data |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
| Status | Discontinued | no data |
Security technologies
Core 2 Duo E7400 and Core 2 Quad Q9550 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | - | no data |
| EDB | + | no data |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E7400 and Core 2 Quad Q9550. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR1,DDR2,DDR3 |
Synthetic benchmark performance
Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.
Combined synthetic benchmark score
This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Core 2 Quad Q9550 outperforms Core 2 Duo E7400 by 125% based on our aggregate benchmark results.
Passmark
Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.
Benchmark coverage: 68%
Core 2 Quad Q9550 outperforms Core 2 Duo E7400 by 127% in Passmark.
GeekBench 5 Single-Core
GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.
Benchmark coverage: 42%
Core 2 Quad Q9550 outperforms Core 2 Duo E7400 by 16% in GeekBench 5 Single-Core.
GeekBench 5 Multi-Core
GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.
Benchmark coverage: 42%
Core 2 Quad Q9550 outperforms Core 2 Duo E7400 by 107% in GeekBench 5 Multi-Core.
Pros & cons summary
| Performance score | 0.67 | 1.51 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Power consumption (TDP) | 65 Watt | 95 Watt |
The Core 2 Quad Q9550 is our recommended choice as it beats the Core 2 Duo E7400 in performance tests.
Should you still have questions on choice between Core 2 Duo E7400 and Core 2 Quad Q9550, ask them in Comments section, and we shall answer.
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