GeForce 840A vs GeForce GTX 660M
In this comparison between GeForce 840A and GeForce GTX 660M you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people GeForce 840A will be the best choice, for others GeForce GTX 660M will be their preference. Study the comparison tables below and make your choice.
GeForce 840A
GeForce GTX 660M is a Laptop Graphics Card
Note: GeForce GTX 660M is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with GeForce GTX 660M here:
Main Specs
| GeForce 840A | GeForce GTX 660M | |
| Power consumption (TDP) | 33 Watt | 50 Watt |
| Interface | PCIe 3.0 x8 | MXM-B (3.0) |
| Memory type | DDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 2 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- GeForce GTX 660M has 51% more power consumption, than GeForce 840A.
- GeForce 840A is connected by PCIe 3.0 x8, and GeForce GTX 660M uses MXM-B (3.0) interface.
- GeForce 840A and GeForce GTX 660M have maximum RAM of 2 GB.
- GeForce 840A is used in Desktops, and GeForce GTX 660M - in Laptops.
- GeForce 840A is build with Maxwell architecture, and GeForce GTX 660M - with Kepler.
- Core clock speed of GeForce 840A is 194 MHz higher, than GeForce GTX 660M.
- GeForce 840A and GeForce GTX 660M are manufactured by 28 nm process technology.
- Memory clock speed of GeForce 840A is 2 MHz higher, than GeForce GTX 660M.
Game benchmarks
| high / 1080p | 3−4 | 6−7 |
| ultra / 1080p | 2−3 | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 14−16 | 16−18 |
| medium / 1080p | 5−6 | 8−9 |
| The average gaming FPS of GeForce GTX 660M in Assassin's Creed Odyssey is 50% more, than GeForce 840A. | ||
| high / 1080p | − | 12−14 |
| ultra / 1080p | 7−8 | 10−11 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 18−20 | 24−27 |
| medium / 1080p | 8−9 | 12−14 |
| The average gaming FPS of GeForce GTX 660M in Battlefield 5 is 45% more, than GeForce 840A. | ||
| low / 768p | 45−50 | 45−50 |
| high / 1080p | 30−35 | 45−50 |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce GTX 660M in Call of Duty: Warzone is 17% more, than GeForce 840A. | ||
| low / 768p | 120−130 | 130−140 |
| medium / 768p | 90−95 | 110−120 |
| ultra / 1080p | 40−45 | 50−55 |
| QHD / 1440p | 24−27 | 27−30 |
| 4K / 2160p | 18−20 | 27−30 |
| high / 768p | 65−70 | 80−85 |
| The average gaming FPS of GeForce GTX 660M in Counter-Strike: Global Offensive is 17% more, than GeForce 840A. | ||
| low / 768p | 80−85 | 55−60 |
| ultra / 1080p | 14−16 | 18−20 |
| medium / 1080p | 40−45 | 45−50 |
| The average gaming FPS of GeForce 840A in Cyberpunk 2077 is 12% more, than GeForce GTX 660M. | ||
| low / 768p | 75−80 | 80−85 |
| medium / 768p | 50−55 | 55−60 |
| ultra / 1080p | 27−30 | 30−35 |
| The average gaming FPS of GeForce GTX 660M in Dota 2 is 9% more, than GeForce 840A. | ||
| high / 1080p | 5−6 | 8−9 |
| ultra / 1080p | − | 7−8 |
| 4K / 2160p | 2−3 | 3−4 |
| low / 720p | 14−16 | 18−20 |
| medium / 1080p | 6−7 | 8−9 |
| The average gaming FPS of GeForce GTX 660M in Far Cry 5 is 28% more, than GeForce 840A. | ||
| high / 1080p | 12−14 | 14−16 |
| ultra / 1080p | 7−8 | 10−11 |
| low / 720p | 50−55 | 60−65 |
| medium / 1080p | 14−16 | 21−24 |
| The average gaming FPS of GeForce GTX 660M in Fortnite is 22% more, than GeForce 840A. | ||
| high / 1080p | 7−8 | 12−14 |
| ultra / 1080p | − | 10−12 |
| QHD / 1440p | 0−1 | 1−2 |
| low / 720p | 20−22 | 24−27 |
| medium / 1080p | 9−10 | 14−16 |
| The average gaming FPS of GeForce GTX 660M in Forza Horizon 4 is 41% more, than GeForce 840A. | ||
| low / 768p | 45−50 | 50−55 |
| medium / 768p | − | 45−50 |
| high / 1080p | 8−9 | 12−14 |
| ultra / 1080p | 5−6 | 6−7 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | 40−45 | − |
| The average gaming FPS of GeForce GTX 660M in Grand Theft Auto V is 20% more, than GeForce 840A. | ||
| high / 1080p | 3−4 | 4−5 |
| ultra / 1080p | 1−2 | 3−4 |
| 4K / 2160p | 0−1 | 0−1 |
| low / 720p | 8−9 | 12−14 |
| medium / 1080p | 4−5 | 6−7 |
| The average gaming FPS of GeForce GTX 660M in Metro Exodus is 50% more, than GeForce 840A. | ||
| low / 768p | 85−90 | 95−100 |
| high / 1080p | 85−90 | 90−95 |
| ultra / 1080p | 80−85 | 80−85 |
| medium / 1080p | 85−90 | 90−95 |
| The average gaming FPS of GeForce GTX 660M in Minecraft is 5% more, than GeForce 840A. | ||
| high / 1080p | − | 16−18 |
| ultra / 1080p | 12−14 | 14−16 |
| low / 720p | 27−30 | 30−35 |
| medium / 1080p | 14−16 | 18−20 |
| The average gaming FPS of GeForce GTX 660M in PLAYERUNKNOWN'S BATTLEGROUNDS is 22% more, than GeForce 840A. | ||
| ultra / 1080p | 7−8 | 7−8 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 8−9 | 12−14 |
| medium / 1080p | − | 10−12 |
| The average gaming FPS of GeForce GTX 660M in Red Dead Redemption 2 is 25% more, than GeForce 840A. | ||
| low / 768p | 16−18 | 24−27 |
| medium / 768p | 12−14 | 16−18 |
| high / 1080p | 6−7 | 9−10 |
| ultra / 1080p | 5−6 | 6−7 |
| 4K / 2160p | − | 6−7 |
| The average gaming FPS of GeForce GTX 660M in The Witcher 3: Wild Hunt is 40% more, than GeForce 840A. | ||
| low / 768p | 70−75 | 85−90 |
| medium / 768p | 35−40 | 45−50 |
| ultra / 1080p | 16−18 | 18−20 |
| high / 768p | 30−35 | 35−40 |
| The average gaming FPS of GeForce GTX 660M in World of Tanks is 20% more, than GeForce 840A. | ||
Full Specs
| GeForce 840A | GeForce GTX 660M | |
| Architecture | Maxwell | Kepler |
| Code name | GM108 | N13E-GE |
| Type | Desktop | Laptop |
| Release date | 17 March 2014 | 22 March 2012 |
| Pipelines | 384 | 384 |
| Core clock speed | 1029 MHz | 835 MHz |
| Boost Clock | 1124 MHz | 950 MHz |
| Transistor count | 1,270 million | |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 17.98 | 30.4 billion/sec |
| Floating-point performance | 863.2 gflops | 729.6 gflops |
| Memory bus width | 64 Bit | 128bit |
| Memory clock speed | 2002 MHz | 2000 MHz |
| Memory bandwidth | 16.02 GB/s | 64.0 GB/s |
| Shared memory | - | |
| DirectX | 12 (11_0) | 12 API |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | 1.1.126 |
| CUDA | 5.0 | + |
| CUDA cores | 384 | |
| Bus support | PCI Express 2.0, PCI Express 3.0 | |
| SLI options | + | |
| HDMI | + | |
| HDCP | + | |
| Maximum VGA resolution | Up to 2048x1536 | |
| Bitcoin / BTC (SHA256) | 36 Mh/s | |
| Laptop size | large | |
| Optimus | + | |
| Check Price |