GeForce 820A vs GeForce 840M
If you are going to buy a new graphics card and are choosing between GeForce 820A and GeForce 840M, 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 820A stacks up against GeForce 840M, check out specs charts below.
GeForce 820A
GeForce 840M is a Laptop Graphics Card
Note: GeForce 840M 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 840M here:
Main Specs
| GeForce 820A | GeForce 840M | |
| Power consumption (TDP) | 15 Watt | 33 Watt |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Memory type | DDR3 | DDR3 |
| Maximum RAM amount | 1 GB | 4 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- GeForce 840M has 120% more power consumption, than GeForce 820A.
- GeForce 820A is connected by PCIe 2.0 x16, and GeForce 840M uses PCIe 3.0 x8 interface.
- GeForce 840M has 3 GB more memory, than GeForce 820A.
- GeForce 820A is used in Desktops, and GeForce 840M - in Laptops.
- GeForce 820A is build with Fermi 2.0 architecture, and GeForce 840M - with Maxwell.
- Core clock speed of GeForce 840M is 254 MHz higher, than GeForce 820A.
- GeForce 820A and GeForce 840M are manufactured by 28 nm process technology.
- Memory clock speed of GeForce 840M is 200 MHz higher, than GeForce 820A.
Game benchmarks
| high / 1080p | 0−1 | 1−2 |
| ultra / 1080p | − | 0−1 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 1−2 | 12−14 |
| medium / 1080p | 0−1 | 3−4 |
| The average gaming FPS of GeForce 840M in Assassin's Creed Odyssey is 1200% more, than GeForce 820A. | ||
| ultra / 1080p | − | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 0−1 | 16−18 |
| medium / 1080p | − | 5−6 |
| low / 768p | 50−55 | 45−50 |
| high / 1080p | 45−50 | 40−45 |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce 820A in Call of Duty: Warzone is 11% more, than GeForce 840M. | ||
| low / 768p | 60−65 | 120−130 |
| medium / 768p | 27−30 | 90−95 |
| ultra / 1080p | 7−8 | 40−45 |
| QHD / 1440p | − | 24−27 |
| 4K / 2160p | − | 18−20 |
| high / 768p | 16−18 | 65−70 |
| The average gaming FPS of GeForce 840M in Counter-Strike: Global Offensive is 189% more, than GeForce 820A. | ||
| low / 768p | 70−75 | 85−90 |
| ultra / 1080p | 0−1 | 16−18 |
| medium / 1080p | 45−50 | 40−45 |
| The average gaming FPS of GeForce 840M in Cyberpunk 2077 is 8% more, than GeForce 820A. | ||
| low / 768p | 45−50 | 75−80 |
| medium / 768p | 10−11 | 50−55 |
| ultra / 1080p | 0−1 | 24−27 |
| The average gaming FPS of GeForce 840M in Dota 2 is 124% more, than GeForce 820A. | ||
| high / 1080p | − | 2−3 |
| ultra / 1080p | − | 2−3 |
| 4K / 2160p | − | 0−1 |
| low / 720p | 0−1 | 12−14 |
| medium / 1080p | − | 3−4 |
| high / 1080p | − | 10−11 |
| ultra / 1080p | − | 5−6 |
| QHD / 1440p | − | 2−3 |
| low / 720p | 21−24 | 50−55 |
| medium / 1080p | 0−1 | 10−12 |
| The average gaming FPS of GeForce 840M in Fortnite is 136% more, than GeForce 820A. | ||
| high / 1080p | 0−1 | 4−5 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 0−1 | 16−18 |
| medium / 1080p | 0−1 | 7−8 |
| low / 768p | 18−20 | 45−50 |
| high / 1080p | 0−1 | 5−6 |
| ultra / 1080p | − | 2−3 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | 12−14 | 35−40 |
| The average gaming FPS of GeForce 840M in Grand Theft Auto V is 162% more, than GeForce 820A. | ||
| high / 1080p | − | 1−2 |
| ultra / 1080p | − | 0−1 |
| 4K / 2160p | − | 0−1 |
| low / 720p | 0−1 | 5−6 |
| medium / 1080p | − | 3−4 |
| low / 768p | 75−80 | 90−95 |
| high / 1080p | 27−30 | 85−90 |
| ultra / 1080p | − | 70−75 |
| medium / 1080p | − | 90−95 |
| The average gaming FPS of GeForce 840M in Minecraft is 69% more, than GeForce 820A. | ||
| ultra / 1080p | − | 12−14 |
| low / 720p | 8−9 | 27−30 |
| medium / 1080p | − | 14−16 |
| The average gaming FPS of GeForce 840M in PLAYERUNKNOWN'S BATTLEGROUNDS is 250% more, than GeForce 820A. | ||
| ultra / 1080p | − | 4−5 |
| QHD / 1440p | − | 0−1 |
| low / 720p | 0−1 | 6−7 |
| low / 768p | 0−1 | 12−14 |
| medium / 768p | − | 9−10 |
| high / 1080p | − | 4−5 |
| ultra / 1080p | − | 3−4 |
| 4K / 2160p | − | 0−1 |
| low / 768p | 45−50 | 75−80 |
| medium / 768p | 14−16 | 35−40 |
| ultra / 1080p | 0−1 | 16−18 |
| high / 768p | 12−14 | 30−35 |
| The average gaming FPS of GeForce 840M in World of Tanks is 96% more, than GeForce 820A. | ||
Full Specs
| GeForce 820A | GeForce 840M | |
| Architecture | Fermi 2.0 | Maxwell |
| Code name | GF117 | N15S-GT |
| Type | Desktop | Laptop |
| Release date | 17 March 2014 | 12 March 2014 |
| Pipelines | 96 | 384 |
| Core clock speed | 775 MHz | 1029 MHz |
| Boost Clock | 1124 MHz | |
| Transistor count | 585 million | |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 12.40 | 17.98 |
| Floating-point performance | 297.6 gflops | 863.2 gflops |
| Memory bus width | 64 Bit | 64 Bit |
| Memory clock speed | 1800 MHz | 2000 MHz |
| Memory bandwidth | 14.4 GB/s | 16.02 GB/s |
| Shared memory | - | |
| DirectX | 12 (11_0) | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | 2.1 | + |
| Bus support | PCI Express 2.0, PCI Express 3.0 | |
| Bitcoin / BTC (SHA256) | 92 Mh/s | |
| Laptop size | medium sized | |
| Optimus | + | |
| GPU Boost | 2.0 | |
| GameWorks | + | |
| Check Price |