Radeon HD 7990 and Radeon HD 7870 - video card comparison
Passmark - benchmark score Radeon HD 7990 vs Radeon HD 7870
Radeon HD 7990
5732
Radeon HD 7870
4779
Radeon HD 7990
Radeon HD 7870
Architecture
GCN 1.0 (2012−2020)
GCN (2011−2017)
GPU code name
Malta
Pitcairn XT
Market segment
Desktop
Desktop
Release date
April 2013
March 2012
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
1000 MHz
Floating-point performance
2x 4,096 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
2800 Million
Pipelines / CUDA cores
2048
1280
Power consumption (TDP)
375 Watt
175 Watt
Texture fill rate
128.0
80.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
6000 MHz
4800 MHz
Memory bandwidth
288.0 GB/s
153.6 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 4x mini-DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
+
HDMI
-
+
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