Radeon HD 7970 and GeForce GTX 780M Mac Edition - video card comparison
Radeon HD 7970
GeForce GTX 780M Mac Edition
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Tahiti XT
GK104
Market segment
Desktop
Desktop
Release date
December 2011
November 2013
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
1x 6-pin + 1x 8-pin
-
Boost clock speed
925 MHz
797 MHz
Core clock speed
-
771 MHz
Floating-point performance
3,789 gflops
2,448 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
3,540 million
Pipelines / CUDA cores
2048
1536
Power consumption (TDP)
300 Watt
122 Watt
Texture fill rate
118.4
102.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
4 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1375 MHz
5000 MHz
Memory bandwidth
264 GB/s
160.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
3.0
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-