AMD Radeon HD 6990M vs AMD Radeon Sky 900
GPU Specs Compare
Graphics Card
Release Date
Jul 2011
Mar 2013
Generation
Vancouver
Radeon Sky
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
900 MHz
1250 MHz
Base Clock
-
825 MHz
Boost Clock
-
950 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
115.2GB/s
240.0GB/s
Render Config
Compute Units
14
28
Shading Units
1120
1792
TMUs
56
112
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
22.88 GPixel/s
30.40 GPixel/s
Texture Rate
40.04 GTexel/s
106.4 GTexel/s
FP32 (float)
1.602 TFLOPS
3.405 TFLOPS
FP64 (double)
-
851.2 GFLOPS
Graphics Processor
GPU Name
Blackcomb
Tahiti
GPU Variant
Blackcomb XTX(216-0811030)
Orthrus
Architecture
TeraScale 2
GCN 1.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
4.313 billion
Die Size
212 mm²
352 mm²
Board Design
TDP
100W
300W
Outputs
No outputs
1x DVI1x mini-DisplayPort 1.2
Power Connectors
None
2x 8-pin
Suggested PSU
-
700 W
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2
Shader Model
5.0
5.1