GeForce 840A vs GeForce GTX 680MX
If you are going to buy a new graphics card and are choosing between GeForce 840A and GeForce GTX 680MX, there are a couple of things to consider. Cards with more VRAM in general perform better and allow you to play on higher graphics settings. Size also makes a difference. A model with a large heatsink can occupy up to three expansion slots on a motherboard. Be sure you have enough room in your PC case. When comparing GPUs with different architectures, more processing cores and even higher TFLOPS will not always translate to better performance. To help you decide which GPU you need, we have measured frame rates in a number of popular games. For more on how the GeForce 840A stacks up against GeForce GTX 680MX, check out specs charts below.
GeForce 840A
GeForce GTX 680MX is a Laptop Graphics Card
Note: GeForce GTX 680MX 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 680MX here:
Main Specs
| GeForce 840A | GeForce GTX 680MX | |
| Power consumption (TDP) | 33 Watt | 122 Watt |
| Interface | PCIe 3.0 x8 | |
| Memory type | DDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 2 GB |
| Display Connectors | No outputs | |
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- GeForce GTX 680MX has 269% more power consumption, than GeForce 840A.
- GeForce 840A and GeForce GTX 680MX have maximum RAM of 2 GB.
- GeForce 840A is used in Desktops, and GeForce GTX 680MX - in Laptops.
- GeForce 840A is build with Maxwell architecture, and GeForce GTX 680MX - with Kepler.
- Core clock speed of GeForce 840A is 309 MHz higher, than GeForce GTX 680MX.
- GeForce 840A and GeForce GTX 680MX are manufactured by 28 nm process technology.
- Memory clock speed of GeForce GTX 680MX is 498 MHz higher, than GeForce 840A.
Game benchmarks
| high / 1080p | 3−4 | 21−24 |
| ultra / 1080p | 2−3 | 12−14 |
| QHD / 1440p | 0−1 | 7−8 |
| 4K / 2160p | − | 5−6 |
| low / 720p | 14−16 | 40−45 |
| medium / 1080p | 5−6 | 27−30 |
| The average gaming FPS of GeForce GTX 680MX in Assassin's Creed Odyssey is 333% more, than GeForce 840A. | ||
| high / 1080p | − | 35−40 |
| ultra / 1080p | 7−8 | 30−33 |
| QHD / 1440p | 0−1 | 14−16 |
| 4K / 2160p | − | 9−10 |
| low / 720p | 18−20 | 70−75 |
| medium / 1080p | 8−9 | 40−45 |
| The average gaming FPS of GeForce GTX 680MX in Battlefield 5 is 336% more, than GeForce 840A. | ||
| low / 768p | 45−50 | 50−55 |
| high / 1080p | 30−35 | − |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce GTX 680MX in Call of Duty: Warzone is 10% more, than GeForce 840A. | ||
| low / 768p | 120−130 | 230−240 |
| medium / 768p | 90−95 | 200−210 |
| ultra / 1080p | 40−45 | 120−130 |
| QHD / 1440p | 24−27 | 100−110 |
| 4K / 2160p | 18−20 | 55−60 |
| high / 768p | 65−70 | 170−180 |
| The average gaming FPS of GeForce GTX 680MX in Counter-Strike: Global Offensive is 141% more, than GeForce 840A. | ||
| low / 768p | 80−85 | 60−65 |
| ultra / 1080p | 14−16 | 50−55 |
| medium / 1080p | 40−45 | 55−60 |
| The average gaming FPS of GeForce GTX 680MX in Cyberpunk 2077 is 23% more, than GeForce 840A. | ||
| low / 768p | 75−80 | 120−130 |
| medium / 768p | 50−55 | 110−120 |
| ultra / 1080p | 27−30 | 80−85 |
| The average gaming FPS of GeForce GTX 680MX in Dota 2 is 105% more, than GeForce 840A. | ||
| high / 1080p | 5−6 | 27−30 |
| ultra / 1080p | − | 24−27 |
| QHD / 1440p | − | 20−22 |
| 4K / 2160p | 2−3 | 8−9 |
| low / 720p | 14−16 | 55−60 |
| medium / 1080p | 6−7 | 27−30 |
| The average gaming FPS of GeForce GTX 680MX in Far Cry 5 is 328% more, than GeForce 840A. | ||
| high / 1080p | 12−14 | 35−40 |
| ultra / 1080p | 7−8 | 27−30 |
| QHD / 1440p | − | 16−18 |
| low / 720p | 50−55 | 130−140 |
| medium / 1080p | 14−16 | 75−80 |
| The average gaming FPS of GeForce GTX 680MX in Fortnite is 213% more, than GeForce 840A. | ||
| high / 1080p | 7−8 | 35−40 |
| ultra / 1080p | − | 27−30 |
| QHD / 1440p | 0−1 | 16−18 |
| 4K / 2160p | − | 14−16 |
| low / 720p | 20−22 | 70−75 |
| medium / 1080p | 9−10 | 40−45 |
| The average gaming FPS of GeForce GTX 680MX in Forza Horizon 4 is 316% more, than GeForce 840A. | ||
| low / 768p | 45−50 | 100−110 |
| medium / 768p | − | 95−100 |
| high / 1080p | 8−9 | 40−45 |
| ultra / 1080p | 5−6 | 18−20 |
| QHD / 1440p | 0−1 | 8−9 |
| medium / 720p | 40−45 | − |
| The average gaming FPS of GeForce GTX 680MX in Grand Theft Auto V is 175% more, than GeForce 840A. | ||
| high / 1080p | 3−4 | 14−16 |
| ultra / 1080p | 1−2 | 10−12 |
| QHD / 1440p | − | 10−12 |
| 4K / 2160p | 0−1 | 3−4 |
| low / 720p | 8−9 | 40−45 |
| medium / 1080p | 4−5 | 18−20 |
| The average gaming FPS of GeForce GTX 680MX in Metro Exodus is 425% more, than GeForce 840A. | ||
| low / 768p | 85−90 | 120−130 |
| high / 1080p | 85−90 | − |
| ultra / 1080p | 80−85 | − |
| medium / 1080p | 85−90 | 110−120 |
| The average gaming FPS of GeForce GTX 680MX in Minecraft is 37% more, than GeForce 840A. | ||
| ultra / 1080p | 12−14 | 14−16 |
| low / 720p | 27−30 | 75−80 |
| medium / 1080p | 14−16 | 18−20 |
| The average gaming FPS of GeForce GTX 680MX in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce 840A. | ||
| high / 1080p | − | 16−18 |
| ultra / 1080p | 7−8 | 10−12 |
| QHD / 1440p | 0−1 | 2−3 |
| 4K / 2160p | − | 2−3 |
| low / 720p | 8−9 | 40−45 |
| medium / 1080p | − | 21−24 |
| The average gaming FPS of GeForce GTX 680MX in Red Dead Redemption 2 is 225% more, than GeForce 840A. | ||
| low / 768p | 16−18 | 80−85 |
| medium / 768p | 12−14 | 50−55 |
| high / 1080p | 6−7 | 27−30 |
| ultra / 1080p | 5−6 | 14−16 |
| 4K / 2160p | − | 9−10 |
| The average gaming FPS of GeForce GTX 680MX in The Witcher 3: Wild Hunt is 340% more, than GeForce 840A. | ||
| low / 768p | 70−75 | 90−95 |
| medium / 768p | 35−40 | 60−65 |
| ultra / 1080p | 16−18 | 40−45 |
| high / 768p | 30−35 | 55−60 |
| The average gaming FPS of GeForce GTX 680MX in World of Tanks is 61% more, than GeForce 840A. | ||
Full Specs
| GeForce 840A | GeForce GTX 680MX | |
| Architecture | Maxwell | Kepler |
| Code name | GM108 | |
| Type | Desktop | Laptop |
| Release date | 17 March 2014 | 23 October 2012 |
| Pipelines | 384 | 1536 |
| Core clock speed | 1029 MHz | 720 MHz |
| Boost Clock | 1124 MHz | |
| Transistor count | 3540 Million | |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 17.98 | 92.2 billion/sec |
| Floating-point performance | 863.2 gflops | |
| Memory bus width | 64 Bit | 256 Bit |
| Memory clock speed | 2002 MHz | 2500 MHz |
| Memory bandwidth | 16.02 GB/s | 160 GB/s |
| Shared memory | - | |
| DirectX | 12 (11_0) | 12 API |
| Shader Model | 5.1 | |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | |
| CUDA | 5.0 | + |
| CUDA cores | 1536 | |
| Bus support | PCI Express 3.0 | |
| SLI options | + | |
| 3D Vision | + | |
| Bitcoin / BTC (SHA256) | 57 Mh/s | |
| Laptop size | large | |
| Optimus | + | |
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