Core 2 Quad Q8400s vs Core 2 Quad Q9550s
General info
Comparing Core 2 Quad Q9550s and Core 2 Quad Q8400s processor market type (desktop or notebook), architecture, sales start time and price.
| Place in performance ranking | not rated | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Market segment | Desktop processor | Desktop processor |
| Architecture codename | Yorkfield (2007−2009) | Yorkfield (2007−2009) |
| Release date | January 2009 (15 years ago) | April 2009 (15 years ago) |
| Current price | $276 | $99 |
Technical specs
Core 2 Quad Q9550s and Core 2 Quad Q8400s 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) | 4 (Quad-Core) |
| Threads | 4 | 4 |
| Base clock speed | 2.83 GHz | 2.66 GHz |
| Boost clock speed | 2.83 GHz | 2.67 GHz |
| L1 cache | 64K (per core) | 64K (per core) |
| L2 cache | 12 MB (shared) | 4 MB (shared) |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 45 nm | 45 nm |
| Die size | 2x 107 mm2 | 2x 81 mm2 |
| Maximum core temperature | 76 °C | 76 °C |
| Maximum case temperature (TCase) | 76 °C | 76 °C |
| Number of transistors | 820 million | 456 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| Unlocked multiplier | No | No |
| VID voltage range | 0.85V-1.3625V | 0.85V-1.3625V |
Compatibility
Information on Core 2 Quad Q9550s and Core 2 Quad Q8400s 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 | 1 |
| Socket | LGA775 | FCLGA775,LGA775 |
| Power consumption (TDP) | 65 Watt | 65 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q9550s and Core 2 Quad Q8400s. You'll probably need this information if you require some particular technology.
| AES-NI | - | - |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | - |
| FSB parity | + | no data |
| Status | Discontinued | Discontinued |
Security technologies
Core 2 Quad Q9550s and Core 2 Quad Q8400s technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q9550s and Core 2 Quad Q8400s are enumerated here.
| VT-d | + | no data |
| VT-x | + | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9550s and Core 2 Quad Q8400s. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR1, DDR2, DDR3 |
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