Radeon HD 7950 and GeForce GTX 660 - video card comparison
Passmark - benchmark score Radeon HD 7950 vs GeForce GTX 660
Radeon HD 7950
4907
GeForce GTX 660
4119
Radeon HD 7950
GeForce GTX 660
Architecture
GCN 1.0 (2012−2020)
Kepler (2012−2018)
GPU code name
Tahiti
GK106
Market segment
Desktop
Desktop
Release date
January 2012
September 2012
Bus support
PCIe 3.0 x16
PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
One 6-pin
SLI options
-
+
Boost clock speed
1250 MHz
1033 MHz
Compute units
28
-
Core clock speed
-
980 MHz
CUDA cores
-
960
Floating-point performance
2,867 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
2,540 million
Pipelines / CUDA cores
1792
960
Power consumption (TDP)
200 Watt
140 Watt
Texture fill rate
89.60
78.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
192-bit GDDR5
Memory clock speed
1250 MHz
6.0 GB/s
Memory bandwidth
240 GB/s
144.2 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
Multi monitor support
-
4 displays
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
2048x1536
DisplayPort support
-
-
Audio input for HDMI
-
Internal
DirectX
DirectX® 11
12 (11_0)
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.3
Shader Model
5.1
5.1
Vulkan
-
1.1.126
3D Blu-Ray
-
+
3D Gaming
-
+
3D Vision
-
+
AppAcceleration
+
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
-
-
ZeroCore
+
-