AMD Radeon HD 7970 GHz Edition vs AMD Radeon R9 M395 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Jun 2012
May 2015
Generation
Southern Islands
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
1000 MHz
-
Boost Clock
1050 MHz
-
Memory Clock
1500 MHz
1365 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.0GB/s
174.7GB/s
Render Config
Compute Units
32
28
Shading Units
2048
1792
TMUs
128
112
ROPs
32
32
L1 Cache
16 KB (per CU)
-
L2 Cache
768 KB
-
Theoretical Performance
Pixel Rate
33.60 GPixel/s
26.69 GPixel/s
Texture Rate
134.4 GTexel/s
93.41 GTexel/s
FP32 (float)
4.301 TFLOPS
2.989 TFLOPS
FP64 (double)
1075 GFLOPS
373.6 GFLOPS
Graphics Processor
GPU Name
Tahiti
Amethyst
GPU Variant
Tahiti XT2(215-0821065)
Amethyst PRO(216-0872004)
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
5 billion
Die Size
352 mm²
366 mm²
Board Design
TDP
300W
250W
Suggested PSU
700 W
-
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin + 1x 8-pin
None
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.0
Vulkan
1.2
1.2
Shader Model
5.1
6.3