Radeon HD 6970 and Radeon R9 M390 Mac Edition - video card comparison
Radeon HD 6970
Radeon R9 M390 Mac Edition
Architecture
Terascale 2 (2009−2015)
GCN 1.0 (2012−2020)
GPU code name
Cayman
Pitcairn
Market segment
Desktop
Desktop
Release date
December 2010
May 2015
Bus support
PCIe 2.0 x16
-
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
880 MHz
-
Core clock speed
-
958 MHz
Floating-point performance
2,703.4 gflops
-
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,640 million
2,800 million
Pipelines / CUDA cores
1536
1024
Power consumption (TDP)
550 Watt
80 Watt
Texture fill rate
84.48
61.31
Memory type
DDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1375 MHz
5.5 GB/s
Memory bandwidth
-
174.7 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_1)
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
-
1.2
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-