Radeon HD 7950 and GeForce GTX 660M - video card comparison
Passmark - benchmark score Radeon HD 7950 vs GeForce GTX 660M
Radeon HD 7950
4907
GeForce GTX 660M
1478
Radeon HD 7950
GeForce GTX 660M
Architecture
GCN 1.0 (2012−2020)
Kepler (2012−2018)
GPU code name
Tahiti
N13E-GE
Market segment
Desktop
Laptop
Release date
January 2012
March 2012
Bus support
PCIe 3.0 x16
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
2x 6-pin
-
SLI options
-
+
Boost clock speed
1250 MHz
950 MHz
Compute units
28
-
Core clock speed
-
835 MHz
CUDA cores
-
384
Floating-point performance
2,867 gflops
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
1,270 million
Pipelines / CUDA cores
1792
384
Power consumption (TDP)
200 Watt
50 Watt
Texture fill rate
89.60
30.4 billion/sec
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
128bit
Memory clock speed
1250 MHz
2000 MHz
Memory bandwidth
240 GB/s
64.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DisplayPort support
-
-
DirectX
DirectX® 11
12 API
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
-
1.1.126
AppAcceleration
+
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
Optimus
-
+
PowerTune
+
-
TrueAudio
-
-
ZeroCore
+
-