AMD Radeon HD 7970 X2 vs AMD Radeon HD 7950 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Aug 2012
Mar 2013
Generation
Southern Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1375 MHz
1250 MHz
Memory
Memory Size
3GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
384bit
Bandwidth
264.0GB/s
240.0GB/s
Render Config
Compute Units
32
28
Shading Units
2048
1792
TMUs
128
112
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
768 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
25.60 GPixel/s
Texture Rate
118.4 GTexel/s
89.60 GTexel/s
FP32 (float)
3.789 TFLOPS
2.867 TFLOPS
FP64 (double)
947.2 GFLOPS
716.8 GFLOPS
Graphics Processor
GPU Name
New Zealand
Tahiti
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
4.313 billion
Die Size
352 mm²
352 mm²
GPU Variant
-
Tahiti PRO(215-0821056)
Board Design
TDP
500W
200W
Suggested PSU
900 W
550 W
Outputs
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
3x 8-pin
2x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.2
1.2
Shader Model
5.1
5.1