GeForce 840A vs Radeon HD 7770

If you are going to buy a new graphics card and are choosing between GeForce 840A and Radeon HD 7770, 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 Radeon HD 7770, check out specs charts below.

Main Specs

  GeForce 840A Radeon HD 7770
Power consumption (TDP) 33 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 840A and Radeon HD 7770 have maximum RAM of 2 GB.
  • Both cards are used in Desktops.
  • GeForce 840A is build with Maxwell architecture, and Radeon HD 7770 - with GCN.
  • Core clock speed of GeForce 840A is 29 MHz higher, than Radeon HD 7770.
  • GeForce 840A and Radeon HD 7770 are manufactured by 28 nm process technology.
  • Memory clock speed of Radeon HD 7770 is 2498 MHz higher, than GeForce 840A.

Game benchmarks

high / 1080p 3−4 10−11
ultra / 1080p 2−3 6−7
QHD / 1440p 0−1 1−2
low / 720p 14−16 24−27
medium / 1080p 5−6 12−14
The average gaming FPS of Radeon HD 7770 in Assassin's Creed Odyssey is 116% more, than GeForce 840A.

Full Specs

  GeForce 840A Radeon HD 7770
Architecture Maxwell GCN
Code name GM108 Cape Verde
Type Desktop Desktop
Release date 17 March 2014 15 February 2012
Pipelines 384 640
Core clock speed 1029 MHz 1000 MHz
Boost Clock 1124 MHz
Manufacturing process technology 28 nm 28 nm
Texture fill rate 17.98
Floating-point performance 863.2 gflops
Memory bus width 64 Bit 128 Bit
Memory clock speed 2002 MHz 4500 MHz
Memory bandwidth 16.02 GB/s
Shared memory -
DirectX 12 (11_0) DirectX 11.1, Shader 5.1
Shader Model 5.1
OpenGL 4.6
OpenCL 1.2
Vulkan 1.1.126
CUDA 5.0
Bitcoin / BTC (SHA256) 156 Mh/s
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