GeForce 840A vs Radeon R9 M390X
In this comparison between GeForce 840A and Radeon R9 M390X 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 Radeon R9 M390X will be their preference. Study the comparison tables below and make your choice.
GeForce 840A
Radeon R9 M390X is a Laptop Graphics Card
Note: Radeon R9 M390X 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 Radeon R9 M390X here:
Main Specs
| GeForce 840A | Radeon R9 M390X | |
| Power consumption (TDP) | 33 Watt | 100 Watt |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Supplementary power connectors | None | |
| Memory type | DDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 4 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- Radeon R9 M390X has 203% more power consumption, than GeForce 840A.
- GeForce 840A is connected by PCIe 3.0 x8, and Radeon R9 M390X uses PCIe 3.0 x16 interface.
- Radeon R9 M390X has 2 GB more memory, than GeForce 840A.
- GeForce 840A is used in Desktops, and Radeon R9 M390X - in Laptops.
- GeForce 840A is build with Maxwell architecture, and Radeon R9 M390X - with GCN 3.
- Core clock speed of GeForce 840A is 306 MHz higher, than Radeon R9 M390X.
- GeForce 840A and Radeon R9 M390X are manufactured by 28 nm process technology.
Game benchmarks
| high / 1080p | 3−4 | 21−24 |
| ultra / 1080p | 2−3 | 12−14 |
| QHD / 1440p | 0−1 | 8−9 |
| 4K / 2160p | − | 5−6 |
| low / 720p | 14−16 | 40−45 |
| medium / 1080p | 5−6 | 27−30 |
| The average gaming FPS of Radeon R9 M390X in Assassin's Creed Odyssey is 333% more, than GeForce 840A. | ||
| high / 1080p | − | 35−40 |
| ultra / 1080p | 7−8 | 30−35 |
| 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 Radeon R9 M390X in Battlefield 5 is 345% 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 Radeon R9 M390X in Call of Duty: Warzone is 10% more, than GeForce 840A. | ||
| low / 768p | 120−130 | 230−240 |
| medium / 768p | 90−95 | 210−220 |
| 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 Radeon R9 M390X in Counter-Strike: Global Offensive is 145% more, than GeForce 840A. | ||
| low / 768p | 80−85 | 60−65 |
| ultra / 1080p | 14−16 | 55−60 |
| medium / 1080p | 40−45 | 55−60 |
| The average gaming FPS of Radeon R9 M390X in Cyberpunk 2077 is 28% more, than GeForce 840A. | ||
| low / 768p | 75−80 | 120−130 |
| medium / 768p | 50−55 | 110−120 |
| ultra / 1080p | 27−30 | 85−90 |
| The average gaming FPS of Radeon R9 M390X in Dota 2 is 109% more, than GeForce 840A. | ||
| high / 1080p | 5−6 | 27−30 |
| ultra / 1080p | − | 24−27 |
| QHD / 1440p | − | 20−22 |
| 4K / 2160p | 2−3 | 9−10 |
| low / 720p | 14−16 | 55−60 |
| medium / 1080p | 6−7 | 30−33 |
| The average gaming FPS of Radeon R9 M390X in Far Cry 5 is 342% 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 Radeon R9 M390X 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 | 75−80 |
| medium / 1080p | 9−10 | 40−45 |
| The average gaming FPS of Radeon R9 M390X in Forza Horizon 4 is 333% more, than GeForce 840A. | ||
| low / 768p | 45−50 | 110−120 |
| medium / 768p | − | 95−100 |
| high / 1080p | 8−9 | 45−50 |
| ultra / 1080p | 5−6 | 18−20 |
| QHD / 1440p | 0−1 | 9−10 |
| medium / 720p | 40−45 | − |
| The average gaming FPS of Radeon R9 M390X in Grand Theft Auto V is 200% 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 | 20−22 |
| The average gaming FPS of Radeon R9 M390X in Metro Exodus is 450% 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 Radeon R9 M390X 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 Radeon R9 M390X in PLAYERUNKNOWN'S BATTLEGROUNDS is 105% more, than GeForce 840A. | ||
| high / 1080p | − | 16−18 |
| ultra / 1080p | 7−8 | 10−12 |
| QHD / 1440p | 0−1 | 3−4 |
| 4K / 2160p | − | 2−3 |
| low / 720p | 8−9 | 40−45 |
| medium / 1080p | − | 21−24 |
| The average gaming FPS of Radeon R9 M390X 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 | 16−18 |
| 4K / 2160p | − | 9−10 |
| The average gaming FPS of Radeon R9 M390X in The Witcher 3: Wild Hunt is 350% 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 Radeon R9 M390X in World of Tanks is 61% more, than GeForce 840A. | ||
Full Specs
| GeForce 840A | Radeon R9 M390X | |
| Architecture | Maxwell | GCN 3 |
| Code name | GM108 | Amethyst (XT) / Tonga |
| Type | Desktop | Laptop |
| Release date | 17 March 2014 | 9 June 2015 |
| Pipelines | 384 | 2048 |
| Core clock speed | 1029 MHz | 723 MHz |
| Boost Clock | 1124 MHz | |
| Transistor count | 5,000 million | |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 17.98 | 92.54 |
| Floating-point performance | 863.2 gflops | 2,961 gflops |
| Memory bus width | 64 Bit | 256 Bit |
| Memory clock speed | 2002 MHz | |
| Memory bandwidth | 16.02 GB/s | 160.0 GB/s |
| Shared memory | - | |
| DirectX | 12 (11_0) | |
| Shader Model | 5.1 | 6.3 |
| OpenGL | 4.6 | 4.4 |
| OpenCL | 1.2 | Not Listed |
| Vulkan | 1.1.126 | + |
| CUDA | 5.0 | |
| FreeSync | + | |
| Bus support | PCIe 3.0 | |
| Laptop size | large | |
| Eyefinity | + | |
| HD3D | + | |
| PowerTune | + | |
| DualGraphics | + | |
| ZeroCore | + | |
| Switchable graphics | + | |
| Mantle | + | |
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