Radeon HD 7990 and Radeon HD 4890 - video card comparison
Passmark - benchmark score Radeon HD 7990 vs Radeon HD 4890
Radeon HD 7990
5732
Radeon HD 4890
1552
Radeon HD 7990
Radeon HD 4890
Architecture
GCN 1.0 (2012−2020)
TeraScale (2005−2013)
GPU code name
Malta
RV790
Market segment
Desktop
Desktop
Release date
April 2013
April 2009
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 8-pin
2x 6-pin
Boost clock speed
1000 MHz
-
Core clock speed
950 MHz
850 MHz
Floating-point performance
2x 4,096 gflops
1,360.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
4,313 million
959 million
Pipelines / CUDA cores
2048
800
Power consumption (TDP)
375 Watt
190 Watt
Texture fill rate
128.0
34.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
6000 MHz
3900 MHz
Memory bandwidth
288.0 GB/s
124.8 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
2x DVI, 1x S-Video
DirectX
12 (11_1)
10.1 (10_1)
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.2.131
N/A