Radeon HD 7990 and Radeon HD 8990 OEM - video card comparison
Radeon HD 7990
Radeon HD 8990 OEM
Architecture
GCN 1.0 (2012−2020)
GCN 1.0 (2012−2020)
GPU code name
Malta
Malta
Market segment
Desktop
Desktop
Release date
April 2013
April 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
2x 8-pin
Boost clock speed
1000 MHz
1000 MHz
Core clock speed
950 MHz
950 MHz
Floating-point performance
2x 4,096 gflops
2x 4,096 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
375 Watt
Texture fill rate
128.0
128.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
3 GB
Memory bus width
384 Bit
384 Bit
Memory clock speed
6000 MHz
6000 MHz
Memory bandwidth
288.0 GB/s
288.0 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