Radeon HD 7990 and Radeon HD 7970 X2 - video card comparison
Radeon HD 7990
Radeon HD 7970 X2
Architecture
GCN 1.0 (2012−2020)
GCN 1.0 (2012−2020)
GPU code name
Malta
New Zealand
Market segment
Desktop
Desktop
Release date
April 2013
August 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
3x 8-pin
Boost clock speed
1000 MHz
-
Core clock speed
950 MHz
925 MHz
Floating-point performance
2x 4,096 gflops
2x 3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
4,313 million
Pipelines / CUDA cores
2048
2048
Power consumption (TDP)
375 Watt
500 Watt
Texture fill rate
128.0
118.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
3 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
6000 MHz
5500 MHz
Memory bandwidth
288.0 GB/s
264.0 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
1x DVI, 4x mini-DisplayPort
DirectX
12 (11_1)
12 (11_1)
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
1.2.131