Radeon HD 7660D and GeForce GTX 645 OEM - video card comparison
Radeon HD 7660D
GeForce GTX 645 OEM
Architecture
Terascale 3 (2010−2013)
Kepler (2012−2018)
GPU code name
Trinity
GK106
Market segment
Desktop
Desktop
Release date
September 2012
April 2013
Interface
IGP
PCIe 3.0 x16
Supplementary power connectors
-
None
Boost clock speed
800 MHz
-
Core clock speed
633 MHz
824 MHz
Floating-point performance
-
949.2 gflops
Manufacturing process technology
32 nm
28 nm
Number of transistors
1,303 million
2,540 million
Pipelines / CUDA cores
384
576
Power consumption (TDP)
100 Watt
65 Watt
Texture fill rate
19.20
39.55
Memory type
System Shared
GDDR5
Maximum RAM amount
System Shared
1 GB
Memory bus width
System Shared
128 Bit
Memory clock speed
System Shared
4000 MHz
Memory bandwidth
-
64 GB/s
Shared memory
+
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126