GeForce 820A vs Radeon HD 7770M
When comparing GeForce 820A and Radeon HD 7770M, 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 Radeon HD 7770M is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.
GeForce 820A
Radeon HD 7770M is a Laptop Graphics Card
Note: Radeon HD 7770M 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 HD 7770M here:
Main Specs
| GeForce 820A | Radeon HD 7770M | |
| Power consumption (TDP) | 15 Watt | 32 Watt |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Memory type | DDR3 | GDDR5 |
| Maximum RAM amount | 1 GB | 1 GB |
| Display Connectors | No outputs | No outputs |
| Check Price |
- Radeon HD 7770M has 113% more power consumption, than GeForce 820A.
- Both video cards are using PCIe 2.0 x16 interface connection to a motherboard.
- GeForce 820A and Radeon HD 7770M have maximum RAM of 1 GB.
- GeForce 820A is used in Desktops, and Radeon HD 7770M - in Laptops.
- GeForce 820A is build with Fermi 2.0 architecture, and Radeon HD 7770M - with GCN.
- Core clock speed of GeForce 820A is 100 MHz higher, than Radeon HD 7770M.
- GeForce 820A and Radeon HD 7770M are manufactured by 28 nm process technology.
- Memory clock speed of Radeon HD 7770M is 2200 MHz higher, than GeForce 820A.
Game benchmarks
| high / 1080p | 0−1 | 9−10 |
| ultra / 1080p | − | 5−6 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 1−2 | 21−24 |
| medium / 1080p | 0−1 | 10−12 |
| The average gaming FPS of Radeon HD 7770M in Assassin's Creed Odyssey is 2100% more, than GeForce 820A. | ||
| high / 1080p | − | 14−16 |
| ultra / 1080p | − | 12−14 |
| QHD / 1440p | 0−1 | 0−1 |
| low / 720p | 0−1 | 30−35 |
| medium / 1080p | − | 16−18 |
| low / 768p | 50−55 | 45−50 |
| high / 1080p | 45−50 | − |
| QHD / 1440p | 0−1 | 0−1 |
| The average gaming FPS of GeForce 820A in Call of Duty: Warzone is 10% more, than Radeon HD 7770M. | ||
| low / 768p | 60−65 | 160−170 |
| medium / 768p | 27−30 | 130−140 |
| ultra / 1080p | 7−8 | 65−70 |
| QHD / 1440p | − | 35−40 |
| 4K / 2160p | − | 27−30 |
| high / 768p | 16−18 | 100−110 |
| The average gaming FPS of Radeon HD 7770M in Counter-Strike: Global Offensive is 321% more, than GeForce 820A. | ||
| low / 768p | 70−75 | 55−60 |
| ultra / 1080p | 0−1 | 24−27 |
| medium / 1080p | 45−50 | 45−50 |
| The average gaming FPS of GeForce 820A in Cyberpunk 2077 is 15% more, than Radeon HD 7770M. | ||
| low / 768p | 45−50 | 90−95 |
| medium / 768p | 10−11 | 70−75 |
| ultra / 1080p | 0−1 | 40−45 |
| The average gaming FPS of Radeon HD 7770M in Dota 2 is 182% more, than GeForce 820A. | ||
| high / 1080p | − | 10−12 |
| ultra / 1080p | − | 10−11 |
| 4K / 2160p | − | 4−5 |
| low / 720p | 0−1 | 24−27 |
| medium / 1080p | − | 12−14 |
| high / 1080p | − | 18−20 |
| ultra / 1080p | − | 12−14 |
| low / 720p | 21−24 | 70−75 |
| medium / 1080p | 0−1 | 30−35 |
| The average gaming FPS of Radeon HD 7770M in Fortnite is 227% more, than GeForce 820A. | ||
| high / 1080p | 0−1 | 16−18 |
| ultra / 1080p | − | 14−16 |
| QHD / 1440p | 0−1 | 3−4 |
| low / 720p | 0−1 | 30−35 |
| medium / 1080p | 0−1 | 18−20 |
| low / 768p | 18−20 | 60−65 |
| medium / 768p | − | 55−60 |
| high / 1080p | 0−1 | 18−20 |
| ultra / 1080p | − | 8−9 |
| QHD / 1440p | 0−1 | 0−1 |
| medium / 720p | 12−14 | − |
| The average gaming FPS of Radeon HD 7770M in Grand Theft Auto V is 226% more, than GeForce 820A. | ||
| high / 1080p | − | 6−7 |
| ultra / 1080p | − | 4−5 |
| 4K / 2160p | − | 1−2 |
| low / 720p | 0−1 | 18−20 |
| medium / 1080p | − | 8−9 |
| low / 768p | 75−80 | 100−110 |
| high / 1080p | 27−30 | 95−100 |
| ultra / 1080p | − | 85−90 |
| medium / 1080p | − | 95−100 |
| The average gaming FPS of Radeon HD 7770M in Minecraft is 90% more, than GeForce 820A. | ||
| high / 1080p | − | 18−20 |
| ultra / 1080p | − | 14−16 |
| low / 720p | 8−9 | 40−45 |
| medium / 1080p | − | 18−20 |
| The average gaming FPS of Radeon HD 7770M in PLAYERUNKNOWN'S BATTLEGROUNDS is 425% more, than GeForce 820A. | ||
| high / 1080p | − | 12−14 |
| ultra / 1080p | − | 8−9 |
| QHD / 1440p | − | 0−1 |
| low / 720p | 0−1 | 16−18 |
| medium / 1080p | − | 12−14 |
| low / 768p | 0−1 | 30−35 |
| medium / 768p | − | 21−24 |
| high / 1080p | − | 12−14 |
| ultra / 1080p | − | 7−8 |
| 4K / 2160p | − | 7−8 |
| low / 768p | 45−50 | 90−95 |
| medium / 768p | 14−16 | 50−55 |
| ultra / 1080p | 0−1 | 24−27 |
| high / 768p | 12−14 | 40−45 |
| The average gaming FPS of Radeon HD 7770M in World of Tanks is 148% more, than GeForce 820A. | ||
Full Specs
| GeForce 820A | Radeon HD 7770M | |
| Architecture | Fermi 2.0 | GCN |
| Code name | GF117 | Chelsea XT |
| Type | Desktop | Laptop |
| Release date | 17 March 2014 | 24 April 2012 |
| Pipelines | 96 | 512 |
| Core clock speed | 775 MHz | 675 MHz |
| Transistor count | 585 million | 1,500 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Texture fill rate | 12.40 | 21.60 |
| Floating-point performance | 297.6 gflops | 691.2 gflops |
| Memory bus width | 64 Bit | 128 Bit |
| Memory clock speed | 1800 MHz | 4000 MHz |
| Memory bandwidth | 14.4 GB/s | 64 GB/s |
| Shared memory | - | |
| DirectX | 12 (11_0) | 12 (11_1) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.2.131 |
| CUDA | 2.1 | |
| Laptop size | medium sized | |
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