Radeon HD 6970 and GeForce GTX 660M Mac Edition - video card comparison
Radeon HD 6970
GeForce GTX 660M Mac Edition
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Cayman
GK107
Market segment
Desktop
Desktop
Release date
December 2010
April 2013
Bus support
PCIe 2.0 x16
-
Interface
PCIe 2.0 x16
MXM-B (3.0)
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
880 MHz
-
Core clock speed
-
950 MHz
Floating-point performance
2,703.4 gflops
729.6 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,640 million
1,270 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
550 Watt
50 Watt
Texture fill rate
84.48
30.40
Memory type
DDR5
GDDR5
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1375 MHz
5000 MHz
Memory bandwidth
-
80 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
3.0
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-