Celeron G1840 vs Core 2 Quad Q9400
Aggregate performance score
Core 2 Quad Q9400 outperforms Celeron G1840 by a significant 20% based on our aggregate benchmark results.
Primary details
Comparing Core 2 Quad Q9400 and Celeron G1840 processor market type (desktop or notebook), architecture, sales start time and price.
| Place in the ranking | 2243 | 2392 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 1.35 |
| Market segment | Desktop processor | Desktop processor |
| Power efficiency | 1.33 | 1.96 |
| Architecture codename | Yorkfield (2007−2009) | Haswell (2013−2015) |
| Release date | August 2008 (16 years ago) | 1 May 2014 (10 years ago) |
| Launch price (MSRP) | no data | $53 |
Cost-effectiveness evaluation
Performance per price, higher is better.
Detailed specifications
Core 2 Quad Q9400 and Celeron G1840 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) | 2 (Dual-core) |
| Threads | 4 | 2 |
| Base clock speed | 2.66 GHz | 2.8 GHz |
| Boost clock speed | 2.67 GHz | 2.8 GHz |
| Bus rate | 1333 MHz | 5 GT/s |
| L1 cache | 64K (per core) | 64 KB (per core) |
| L2 cache | 6 MB (shared) | 256 KB (per core) |
| L3 cache | 0 KB | 3 MB (shared) |
| Chip lithography | 45 nm | 22 nm |
| Die size | 2x 81 mm2 | 177 mm2 |
| Maximum case temperature (TCase) | 71 °C | 72 °C |
| Number of transistors | 456 million | 1,400 million |
| 64 bit support | + | + |
| Windows 11 compatibility | - | - |
| VID voltage range | 0.85V-1.3625V | no data |
Compatibility
Information on Core 2 Quad Q9400 and Celeron G1840 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 | FCLGA1150 |
| Power consumption (TDP) | 95 Watt | 53 Watt |
Technologies and extensions
Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Celeron G1840. You'll probably need this information if you require some particular technology.
| Instruction set extensions | no data | Intel® SSE4.1, Intel® SSE4.2 |
| Enhanced SpeedStep (EIST) | + | + |
| Turbo Boost Technology | - | - |
| Hyper-Threading Technology | - | - |
| Idle States | + | + |
| Thermal Monitoring | + | + |
| Demand Based Switching | - | no data |
| FSB parity | - | no data |
Security technologies
Core 2 Quad Q9400 and Celeron G1840 technologies aimed at improving security, for example, by protecting against hacks.
| TXT | + | - |
| EDB | + | + |
| Secure Key | no data | + |
Virtualization technologies
Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Celeron G1840 are enumerated here.
| VT-d | + | - |
| VT-x | + | + |
| VT-i | no data | - |
| EPT | no data | + |
Memory specs
Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Celeron G1840. Depending on the motherboard, higher memory frequencies may be supported.
| Supported memory types | DDR1, DDR2, DDR3 | DDR3 |
| Maximum memory size | no data | 32 GB |
| Max memory channels | no data | 2 |
| Maximum memory bandwidth | no data | 21.3 GB/s |
| ECC memory support | - | + |
Graphics specifications
General parameters of integrated GPUs, if any.
| Integrated graphics card | no data | Intel® HD Graphics for 4th Generation Intel® Processors |
| Max video memory | no data | 1.7 GB |
| Quick Sync Video | - | + |
| Clear Video HD | no data | + |
| Graphics max frequency | no data | 1.05 GHz |
Graphics interfaces
Available interfaces and connections of Core 2 Quad Q9400 and Celeron G1840 integrated GPUs.
| Number of displays supported | no data | 3 |
| eDP | no data | + |
| DisplayPort | - | + |
| HDMI | - | + |
| DVI | no data | + |
| VGA | no data | + |
Graphics image quality
Maximum display resolutions supported by Core 2 Quad Q9400 and Celeron G1840 integrated GPUs, including resolutions over different interfaces.
| Max resolution over HDMI 1.4 | no data | 1920x1080@60Hz |
| Max resolution over eDP | no data | 2560x1600@60Hz |
| Max resolution over DisplayPort | no data | 2560x1600@60Hz |
| Max resolution over VGA | no data | 1920x1200@60Hz |
Graphics API support
APIs supported by Core 2 Quad Q9400 and Celeron G1840 integrated GPUs, sometimes API versions are included.
| DirectX | no data | 11.1/12 |
| OpenGL | no data | 4.3 |
Peripherals
Specifications and connection of peripherals supported by Core 2 Quad Q9400 and Celeron G1840.
| PCIe version | no data | Up to 3.0 |
| PCI Express lanes | no data | 16 |
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.
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.
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.
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.
3DMark Fire Strike Physics
Pros & cons summary
| Performance score | 1.34 | 1.12 |
| Physical cores | 4 | 2 |
| Threads | 4 | 2 |
| Chip lithography | 45 nm | 22 nm |
| Power consumption (TDP) | 95 Watt | 53 Watt |
Core 2 Quad Q9400 has a 19.6% higher aggregate performance score, and 100% more physical cores and 100% more threads.
Celeron G1840, on the other hand, has a 104.5% more advanced lithography process, and 79.2% lower power consumption.
The Core 2 Quad Q9400 is our recommended choice as it beats the Celeron G1840 in performance tests.
Should you still have questions on choice between Core 2 Quad Q9400 and Celeron G1840, 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.
