Radeon HD 6870 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon HD 6870 vs GeForce GT 640M
Radeon HD 6870
2285
GeForce GT 640M
946
Radeon HD 6870
GeForce GT 640M
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
RV940 Barts
N13P-GS
Market segment
Desktop
Laptop
Release date
October 2010
March 2012
Bus support
PCIe 2.0 x16
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
-
Boost clock speed
900 MHz
645 MHz
Core clock speed
-
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
2,016.0 gflops
480.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,270 million
Pipelines / CUDA cores
1120
384
Power consumption (TDP)
151 Watt
32 Watt
Texture fill rate
50.40
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
1050 MHz
1800 - 4000 MHz
Memory bandwidth
134.4 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DisplayPort support
-
-
DirectX
DirectX® 11
12 API
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.4
4.5
Shader Model
5.0
5.1
Vulkan
-
1.1.126
3D Blu-Ray
-
+
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
Optimus
-
+
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-