Core 2 Quad Q9400 vs Phenom II X2 X640 BE
Aggregate performance score
Core 2 Quad Q9400 outperforms Phenom II X2 X640 BE by a substantial 33% based on our aggregate benchmark results.
Primary details
Comparing Phenom II X2 X640 BE and Core 2 Quad Q9400 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | 2421 | 2211 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Laptop | Desktop processor |
| Series | 2x AMD Phenom II | no data |
| Architecture codename | Champlain (2010−2011) | Yorkfield (2007−2009) |
| Release date | 12 May 2011 (13 years ago) | August 2008 (16 years ago) |
Detailed specifications
Phenom II X2 X640 BE and Core 2 Quad Q9400 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 | no data | 2.66 GHz |
| Boost clock speed | 3.2 GHz | 2.67 GHz |
| Bus rate | 3600 MHz | 1333 MHz |
| L1 cache | 256 KB | 64K (per core) |
| L2 cache | 2 MB | 6 MB (shared) |
| L3 cache | no data | 0 KB |
| Chip lithography | 45 nm | 45 nm |
| Die size | no data | 2x 81 mm2 |
| Maximum case temperature (TCase) | no data | 71 °C |
| Number of transistors | no data | 456 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | no data | 0.85V-1.3625V |
Compatibility
Information on Phenom II X2 X640 BE and Core 2 Quad Q9400 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 | S1 | LGA775 |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Phenom II X2 X640 BE and Core 2 Quad Q9400. You'll probably need this information if you require some particular technology.
| Instruction set extensions | MMX, 3DNow!, SSE1-3A, AMD64, Enhanced Virus Protection, Virtualization | no data |
| VirusProtect | + | - |
| Enhanced SpeedStep (EIST) | no data | + |
| 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 | no data | Discontinued |
Security technologies
Phenom II X2 X640 BE and Core 2 Quad Q9400 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 Phenom II X2 X640 BE and Core 2 Quad Q9400 are enumerated here.
| AMD-V | + | - |
| VT-d | no data | + |
| VT-x | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Phenom II X2 X640 BE and Core 2 Quad Q9400. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR3 | DDR1, DDR2, DDR3 |
Pros & cons summary
| Performance score | 1.04 | 1.38 |
| Physical cores | 2 | 4 |
| Threads | 2 | 4 |
| Power consumption (TDP) | 45 Watt | 95 Watt |
Phenom II X2 X640 BE has 111.1% lower power consumption.
Core 2 Quad Q9400, on the other hand, has a 32.7% higher aggregate performance score, and 100% more physical cores and 100% more threads.
The Core 2 Quad Q9400 is our recommended choice as it beats the Phenom II X2 X640 BE in performance tests.
Be aware that Phenom II X2 X640 BE is a notebook processor while Core 2 Quad Q9400 is a desktop one.
Should you still have questions on choice between Phenom II X2 X640 BE and Core 2 Quad Q9400, ask them in Comments section, and we shall answer.
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