Radeon HD 6850M and GeForce GT 640M LE - video card comparison
Radeon HD 6850M
GeForce GT 640M LE
Architecture
Terascale 2 (2009−2015)
Fermi / Kepler (2012)
GPU code name
Granville Pro/LP
N13P-LP
Market segment
Laptop
Laptop
Release date
January 2011
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
575 / 675 MHz
Up to 500 MHz
CUDA cores
-
Up to 384
Floating-point performance
1,080.0 gflops
384.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,040 million
585 million
Pipelines / CUDA cores
800
384
Power consumption (TDP)
50 Watt
20 Watt
Texture fill rate
27.00
Up to 16.0 billion/sec
Memory type
DDR3, GDDR5
DDR3\DDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
128 Bit
128bit
Memory clock speed
800 MHz
1800 - 4000 MHz
Memory bandwidth
25.6 GB/s
Up to 28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
11.2 (11_0)
12 API
CUDA
-
+
OpenCL
1.2
1.1
OpenGL
4.4
4.5
Shader Model
5.0
5.1
Vulkan
N/A
N/A
3D Blu-Ray
-
+
Optimus
-
+