Radeon HD 7870 and Radeon HD 8990 OEM - video card comparison
Radeon HD 7870
Radeon HD 8990 OEM
Architecture
GCN (2011−2017)
GCN 1.0 (2012−2020)
GPU code name
Pitcairn XT
Malta
Market segment
Desktop
Desktop
Release date
March 2012
April 2013
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
2x 8-pin
Boost clock speed
-
1000 MHz
Core clock speed
1000 MHz
950 MHz
Floating-point performance
-
2x 4,096 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
4,313 million
Pipelines / CUDA cores
1280
2048
Power consumption (TDP)
175 Watt
375 Watt
Texture fill rate
80.00
128.0
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
3 GB
Memory bus width
256 Bit
384 Bit
Memory clock speed
4800 MHz
6000 MHz
Memory bandwidth
153.6 GB/s
288.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 4x 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