GeForce GTX 660 OEM and Radeon HD 7790 - video card comparison
GeForce GTX 660 OEM
Radeon HD 7790
Architecture
Kepler (2012−2018)
GCN 2.0 (2013−2017)
GPU code name
GK104
Bonaire
Market segment
Desktop
Desktop
Release date
August 2012
March 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin
Boost clock speed
888 MHz
-
Core clock speed
823 MHz
1000 MHz
Floating-point performance
2,046 gflops
1,792 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
2,080 million
Pipelines / CUDA cores
1152
896
Power consumption (TDP)
130 Watt
85 Watt
Texture fill rate
85.25
56.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5600 MHz
6000 MHz
Memory bandwidth
179.2 GB/s
96 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.3
Vulkan
1.1.126
1.2.131