Radeon HD 6850 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon HD 6850 vs GeForce GT 640M
Radeon HD 6850
2030
GeForce GT 640M
946
Radeon HD 6850
GeForce GT 640M
Architecture
TeraScale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Barts
N13P-GS
Market segment
Desktop
Laptop
Release date
October 2010
March 2012
Bus support
AGP
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
-
Boost clock speed
-
645 MHz
Core clock speed
-
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
1,488.0 gflops
480.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,700 million
1,270 million
Pipelines / CUDA cores
960
384
Power consumption (TDP)
127 Watt
32 Watt
Texture fill rate
37.20
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
-
1800 - 4000 MHz
Memory bandwidth
128.0 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
-
-