GeForce 820A vs GeForce 840A
When comparing GeForce 820A and GeForce 840A, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce 820A and GeForce 840A is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce 820A
GeForce 840A
Main Specs
| GeForce 820A | GeForce 840A | |
| 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 | 2 GB |
| Display Connectors | No outputs | No outputs |
- GeForce 840A has 120% more power consumption, than GeForce 820A.
- GeForce 820A is connected by PCIe 2.0 x16, and GeForce 840A uses PCIe 3.0 x8 interface.
- GeForce 840A has 1 GB more memory, than GeForce 820A.
- Both cards are used in Desktops.
- GeForce 820A is build with Fermi 2.0 architecture, and GeForce 840A - with Maxwell.
- Core clock speed of GeForce 840A is 254 MHz higher, than GeForce 820A.
- GeForce 820A and GeForce 840A are manufactured by 28 nm process technology.
- Memory clock speed of GeForce 840A is 202 MHz higher, than GeForce 820A.
Game benchmarks
| high / 1080p | 0−1 | 3−4 |
| ultra / 1080p | − | 2−3 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 1−2 | 14−16 |
| medium / 1080p | 0−1 | 5−6 |
| The average gaming FPS of GeForce 840A in Assassin's Creed Odyssey is 1400% more, than GeForce 820A. | ||
| ultra / 1080p | − | 7−8 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 0−1 | 18−20 |
| medium / 1080p | − | 8−9 |
| low / 768p | 50−55 | 45−50 |
| high / 1080p | 45−50 | 30−35 |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce 820A in Call of Duty: Warzone is 25% more, than GeForce 840A. | ||
| 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 840A in Counter-Strike: Global Offensive is 189% more, than GeForce 820A. | ||
| low / 768p | 70−75 | 80−85 |
| ultra / 1080p | 0−1 | 14−16 |
| medium / 1080p | 45−50 | 40−45 |
| The average gaming FPS of GeForce 840A in Cyberpunk 2077 is 3% more, than GeForce 820A. | ||
| low / 768p | 45−50 | 75−80 |
| medium / 768p | 10−11 | 50−55 |
| ultra / 1080p | 0−1 | 27−30 |
| The average gaming FPS of GeForce 840A in Dota 2 is 124% more, than GeForce 820A. | ||
| high / 1080p | − | 5−6 |
| 4K / 2160p | − | 2−3 |
| low / 720p | 0−1 | 14−16 |
| medium / 1080p | − | 6−7 |
| high / 1080p | − | 12−14 |
| ultra / 1080p | − | 7−8 |
| low / 720p | 21−24 | 50−55 |
| medium / 1080p | 0−1 | 14−16 |
| The average gaming FPS of GeForce 840A in Fortnite is 136% more, than GeForce 820A. | ||
| high / 1080p | 0−1 | 7−8 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 0−1 | 20−22 |
| medium / 1080p | 0−1 | 9−10 |
| low / 768p | 18−20 | 45−50 |
| high / 1080p | 0−1 | 8−9 |
| ultra / 1080p | − | 5−6 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | 12−14 | 40−45 |
| The average gaming FPS of GeForce 840A in Grand Theft Auto V is 181% more, than GeForce 820A. | ||
| high / 1080p | − | 3−4 |
| ultra / 1080p | − | 1−2 |
| 4K / 2160p | − | 0−1 |
| low / 720p | 0−1 | 8−9 |
| medium / 1080p | − | 4−5 |
| low / 768p | 75−80 | 85−90 |
| high / 1080p | 27−30 | 85−90 |
| ultra / 1080p | − | 80−85 |
| medium / 1080p | − | 85−90 |
| The average gaming FPS of GeForce 840A in Minecraft is 64% more, than GeForce 820A. | ||
| ultra / 1080p | − | 12−14 |
| low / 720p | 8−9 | 27−30 |
| medium / 1080p | − | 14−16 |
| The average gaming FPS of GeForce 840A in PLAYERUNKNOWN'S BATTLEGROUNDS is 250% more, than GeForce 820A. | ||
| ultra / 1080p | − | 7−8 |
| QHD / 1440p | − | 0−1 |
| low / 720p | 0−1 | 8−9 |
| low / 768p | 0−1 | 16−18 |
| medium / 768p | − | 12−14 |
| high / 1080p | − | 6−7 |
| ultra / 1080p | − | 5−6 |
| low / 768p | 45−50 | 70−75 |
| medium / 768p | 14−16 | 35−40 |
| ultra / 1080p | 0−1 | 16−18 |
| high / 768p | 12−14 | 30−35 |
| The average gaming FPS of GeForce 840A in World of Tanks is 88% more, than GeForce 820A. | ||
Full Specs
| GeForce 820A | GeForce 840A | |
| Architecture | Fermi 2.0 | Maxwell |
| Code name | GF117 | GM108 |
| Type | Desktop | Desktop |
| Release date | 17 March 2014 | 17 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 | 2002 MHz |
| Memory bandwidth | 14.4 GB/s | 16.02 GB/s |
| DirectX | 12 (11_0) | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | 2.1 | 5.0 |