Radeon HD 7990 and Radeon R9 285 - video card comparison
Passmark - benchmark score Radeon HD 7990 vs Radeon R9 285
Radeon HD 7990
5732
Radeon R9 285
6880
Radeon HD 7990
Radeon R9 285
Architecture
GCN 1.0 (2012−2020)
GCN 3.0 (2014−2017)
GPU code name
Malta
Tonga
Market segment
Desktop
Desktop
Release date
April 2013
September 2014
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
2x 6-pin
Boost clock speed
1000 MHz
-
Core clock speed
950 MHz
918 MHz
Floating-point performance
2x 4,096 gflops
3,290 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
5,000 million
Pipelines / CUDA cores
2048
1792
Power consumption (TDP)
375 Watt
190 Watt
Texture fill rate
128.0
102.8
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
6000 MHz
5.5 GB/s
Memory bandwidth
288.0 GB/s
176.0 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
HDMI
-
+
DirectX
12 (11_1)
12 (12_0)
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.2.131
1.2.170