Radeon HD 6870 and GeForce 840M - video card comparison
Passmark - benchmark score Radeon HD 6870 vs GeForce 840M
Radeon HD 6870
2285
GeForce 840M
1121
Radeon HD 6870
GeForce 840M
Architecture
Terascale 2 (2009−2015)
Maxwell (2014−2018)
GPU code name
RV940 Barts
N15S-GT
Market segment
Desktop
Laptop
Release date
October 2010
March 2014
Bus support
PCIe 2.0 x16
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Supplementary power connectors
2x 6-pin
-
Boost clock speed
900 MHz
1124 MHz
Core clock speed
-
1029 MHz
Floating-point performance
2,016.0 gflops
863.2 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
-
Pipelines / CUDA cores
1120
384
Power consumption (TDP)
151 Watt
33 Watt
Texture fill rate
50.40
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1050 MHz
2000 MHz
Memory bandwidth
134.4 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.4
4.5
Shader Model
5.0
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
GameWorks
-
+
GPU Boost
-
2.0
HD3D
-
-
Optimus
-
+
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-