AMD Radeon Sky 900 vs AMD Radeon HD 7970M
GPU · Specs Compare
Graphics Card
Release Date
Mar 2013
Apr 2012
Generation
Radeon Sky
London
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Clock Speeds
Base Clock
825 MHz
—
Boost Clock
950 MHz
—
Memory Clock
1250 MHz
1200 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
240.0GB/s
153.6GB/s
Render Config
Compute Units
28
20
Shading Units
1792
1280
TMUs
112
80
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
30.40 GPixel/s
27.20 GPixel/s
Texture Rate
106.4 GTexel/s
68.00 GTexel/s
FP32 (float)
3.405 TFLOPS
2.176 TFLOPS
FP64 (double)
851.2 GFLOPS
136.0 GFLOPS
Graphics Processor
GPU Name
Tahiti
Wimbledon
GPU Variant
Orthrus
Wimbledon XT(216-0836036)
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
2.8 billion
Die Size
352 mm²
212 mm²
Board Design
TDP
300W
100W
Suggested PSU
700 W
—
Outputs
1x DVI1x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 8-pin
None
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
▲ Specs Compare
Data sourced from official specifications and benchmark tests.