Phenom II X3 P840 vs Core 2 Quad Q9400
Aggregate performance score
Core 2 Quad Q9400 outperforms Phenom II X3 P840 by an impressive 63% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Quad Q9400 and Phenom II X3 P840 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2241 | 2580 |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Laptop |
| Series | no data | 3x AMD Phenom II |
| Power efficiency | 1.34 | 3.12 |
| Architecture codename | Yorkfield (2007−2009) | Champlain (2010−2011) |
| Release date | August 2008 (16 years ago) | 4 October 2010 (14 years ago) |
Detailed specifications
Core 2 Quad Q9400 and Phenom II X3 P840 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) | 3 (Tri-Core) |
| Threads | 4 | 3 |
| Base clock speed | 2.66 GHz | no data |
| Boost clock speed | 2.67 GHz | 1.9 GHz |
| Bus rate | 1333 MHz | 3600 MHz |
| L1 cache | 64K (per core) | 384 KB |
| L2 cache | 6 MB (shared) | 1.5 MB |
| L3 cache | 0 KB | no data |
| Chip lithography | 45 nm | 45 nm |
| Die size | 2x 81 mm2 | no data |
| Maximum case temperature (TCase) | 71 °C | no data |
| Number of transistors | 456 million | no data |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q9400 and Phenom II X3 P840 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 | S1 |
| Power consumption (TDP) | 95 Watt | 25 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Phenom II X3 P840. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Virtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a) |
| 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 |
Security technologies
Core 2 Quad Q9400 and Phenom II X3 P840 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 Quad Q9400 and Phenom II X3 P840 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 Core 2 Quad Q9400 and Phenom II X3 P840. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR3 |
Pros & cons summary
| Performance score | 1.37 | 0.84 |
| Physical cores | 4 | 3 |
| Threads | 4 | 3 |
| Power consumption (TDP) | 95 Watt | 25 Watt |
Core 2 Quad Q9400 has a 63.1% higher aggregate performance score, and 33.3% more physical cores and 33.3% more threads.
Phenom II X3 P840, on the other hand, has 280% lower power consumption.
The Core 2 Quad Q9400 is our recommended choice as it beats the Phenom II X3 P840 in performance tests.
Note that Core 2 Quad Q9400 is a desktop processor while Phenom II X3 P840 is a notebook one.
Should you still have questions on choice between Core 2 Quad Q9400 and Phenom II X3 P840, ask them in Comments section, and we shall answer.
Similar processor comparisons
We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.
