GeForce 840A vs Radeon HD 6870

When comparing GeForce 840A and Radeon HD 6870, 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 840A and Radeon HD 6870 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

Main Specs

  GeForce 840A Radeon HD 6870
Power consumption (TDP) 33 Watt 151 Watt
Interface PCIe 3.0 x8 PCIe 2.0 x16
Supplementary power connectors 2x 6-pin
Memory type DDR3 GDDR5
Maximum RAM amount 2 GB 1 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 2x mini-DisplayPort
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  • Radeon HD 6870 has 357% more power consumption, than GeForce 840A.
  • GeForce 840A is connected by PCIe 3.0 x8, and Radeon HD 6870 uses PCIe 2.0 x16 interface.
  • GeForce 840A has 1 GB more memory, than Radeon HD 6870.
  • Both cards are used in Desktops.
  • GeForce 840A is build with Maxwell architecture, and Radeon HD 6870 - with Terascale 2.
  • GeForce 840A is manufactured by 28 nm process technology, and Radeon HD 6870 - by 40 nm process technology.
  • Memory clock speed of GeForce 840A is 952 MHz higher, than Radeon HD 6870.

Game benchmarks

high / 1080p 3−4 10−12
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 6870 in Assassin's Creed Odyssey is 133% more, than GeForce 840A.

Full Specs

  GeForce 840A Radeon HD 6870
Architecture Maxwell Terascale 2
Code name GM108 RV940 Barts
Type Desktop Desktop
Release date 17 March 2014 22 October 2010
Pipelines 384 1120
Core clock speed 1029 MHz
Boost Clock 1124 MHz 900 MHz
Transistor count 1,700 million
Manufacturing process technology 28 nm 40 nm
Texture fill rate 17.98 50.40
Floating-point performance 863.2 gflops 2,016.0 gflops
Length 220 mm
Memory bus width 64 Bit 256 Bit
Memory clock speed 2002 MHz 1050 MHz
Memory bandwidth 16.02 GB/s 134.4 GB/s
Shared memory -
DirectX 12 (11_0)
Shader Model 5.1 5.0
OpenGL 4.6 4.4
OpenCL 1.2 1.2
Vulkan 1.1.126
CUDA 5.0
Bus support PCIe 2.0 x16
HDMI +
Bitcoin / BTC (SHA256) 213 Mh/s
Eyefinity +
Design reference
CrossFire +
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