Radeon HD 6640G2 and Radeon HD 4670 X2 - video card comparison
Radeon HD 6640G2
Radeon HD 4670 X2
Architecture
Terascale 2 (2009−2015)
TeraScale (2005−2013)
GPU code name
-
RV730
Market segment
Laptop
Desktop
Release date
June 2011
September 2008
Interface
-
PCIe 2.0 x16
Supplementary power connectors
-
1x 6-pin
Core clock speed
-
750 MHz
Floating-point performance
-
2x 480.0 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
-
514 million
Pipelines / CUDA cores
560
320
Power consumption (TDP)
-
118 Watt
Texture fill rate
-
24.00
Memory type
-
GDDR3
Maximum RAM amount
-
512 MB
Memory bus width
-
128 Bit
Memory clock speed
-
1400 MHz
Memory bandwidth
-
22.4 GB/s
Shared memory
-
-
Display Connectors
-
4x DVI
DirectX
11
10.1 (10_1)
OpenCL
-
1.1
OpenGL
-
3.3
Shader Model
-
4.1
Vulkan
-
N/A