Celeron 420 vs Core 2 Quad Q9400s
Primary details
Comparing Core 2 Quad Q9400s and Celeron 420 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the 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) | Conroe-L (2007−2008) |
| Release date | 18 January 2009 (15 years ago) | June 2007 (17 years ago) |
| Launch price (MSRP) | no data | $23 |
Detailed specifications
Core 2 Quad Q9400s and Celeron 420 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) | 1 (Single-Core) |
| Threads | 4 | 1 |
| Base clock speed | 2.66 GHz | 1.6 GHz |
| Boost clock speed | 0.67 GHz | 1.6 GHz |
| Bus rate | 1333 MHz | no data |
| L1 cache | 64 KB (per core) | 64 KB |
| L2 cache | 6 MB (shared) | 512 KB |
| L3 cache | 0 KB | 0 KB |
| Chip lithography | 45 nm | 65 nm |
| Die size | 2x 82 mm2 | 77 mm2 |
| Maximum case temperature (TCase) | 76 °C | 60 °C |
| Number of transistors | 456 million | 105 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 0.85V-1.3625V | 1V-1.3375V |
Compatibility
Information on Core 2 Quad Q9400s and Celeron 420 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 | LGA775 |
| Power consumption (TDP) | 65 Watt | 35 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q9400s and Celeron 420. You'll probably need this information if you require some particular technology.
| Enhanced SpeedStep (EIST) | + | - |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | - |
| FSB parity | - | - |
Security technologies
Core 2 Quad Q9400s and Celeron 420 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 Q9400s and Celeron 420 are enumerated here.
| VT-d | + | - |
| VT-x | + | - |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400s and Celeron 420. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR1, DDR2, DDR3 |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | On certain motherboards (Chipset feature) | no data |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q9400s and Celeron 420.
| PCIe version | 2.0 | no data |
Pros & cons summary
| Physical cores | 4 | 1 |
| Threads | 4 | 1 |
| Chip lithography | 45 nm | 65 nm |
| Power consumption (TDP) | 65 Watt | 35 Watt |
Core 2 Quad Q9400s has 300% more physical cores and 300% more threads, and a 44.4% more advanced lithography process.
Celeron 420, on the other hand, has 85.7% lower power consumption.
We couldn't decide between Core 2 Quad Q9400s and Celeron 420. We've got no test results to judge.
Should you still have questions on choice between Core 2 Quad Q9400s and Celeron 420, ask them in Comments section, and we shall answer.
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