AMD Radeon HD 6990 vs AMD Radeon HD 6990M
GPU Specs Compare
Graphics Card
Release Date
Mar 2011
Jul 2011
Generation
Northern Islands
Vancouver
Type
Desktop
Mobile
Bus Interface
PCIe 2.0 x16
MXM-B (3.0)
Clock Speeds
Memory Clock
1250 MHz
900 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
115.2GB/s
Render Config
Compute Units
24
14
Shading Units
1536
1120
TMUs
96
56
ROPs
32
32
L1 Cache
8 KB (per CU)
8 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
26.56 GPixel/s
22.88 GPixel/s
Texture Rate
79.68 GTexel/s
40.04 GTexel/s
FP32 (float)
2.550 TFLOPS
1.602 TFLOPS
FP64 (double)
637.4 GFLOPS
-
Graphics Processor
GPU Name
Antilles
Blackcomb
GPU Variant
Antilles XT(215-0807027)
Blackcomb XTX(216-0811030)
Architecture
TeraScale 3
TeraScale 2
Foundry
TSMC
TSMC
Process Size
40 nm
40 nm
Transistors
2.64 billion
1.7 billion
Die Size
389 mm²
212 mm²
Board Design
TDP
375W
100W
Suggested PSU
750 W
-
Outputs
1x DVI4x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 8-pin
None
Graphics Features
DirectX
11.2 (11_0)
11.2 (11_0)
OpenGL
4.4
4.4
OpenCL
1.2
1.2
Vulkan
N/A
N/A
Shader Model
5.0
5.0