Radeon HD 7990 and Radeon HD 8970M Crossfire - video card comparison
Radeon HD 7990
Radeon HD 8970M Crossfire
Architecture
GCN 1.0 (2012−2020)
GCN (2011−2017)
GPU code name
Malta
Neptune CF
Market segment
Desktop
Laptop
Release date
April 2013
May 2012
Interface
PCIe 3.0 x16
-
Supplementary power connectors
2x 8-pin
-
Boost clock speed
1000 MHz
900 MHz
Core clock speed
950 MHz
850 MHz
Floating-point performance
2x 4,096 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
-
Pipelines / CUDA cores
2048
2560
Power consumption (TDP)
375 Watt
200 Watt
Texture fill rate
128.0
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
-
Memory bus width
384 Bit
2x 256 Bit
Memory clock speed
6000 MHz
4800 MHz
Memory bandwidth
288.0 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 4x mini-DisplayPort
-
DirectX
12 (11_1)
11.1
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
1.2.131
-