AMD Radeon HD 7970M vs AMD Radeon HD 7950 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Apr 2012
Mar 2013
Generation
London
Southern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1250 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
153.6GB/s
240.0GB/s
Render Config
Compute Units
20
28
Shading Units
1280
1792
TMUs
80
112
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
27.20 GPixel/s
25.60 GPixel/s
Texture Rate
68.00 GTexel/s
89.60 GTexel/s
FP32 (float)
2.176 TFLOPS
2.867 TFLOPS
FP64 (double)
136.0 GFLOPS
716.8 GFLOPS
Graphics Processor
GPU Name
Wimbledon
Tahiti
GPU Variant
Wimbledon XT(216-0836036)
Tahiti PRO(215-0821056)
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
4.313 billion
Die Size
212 mm²
352 mm²
Board Design
TDP
100W
200W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
2x 6-pin
Suggested PSU
-
550 W
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