Radeon HD 7970 and Radeon HD 7870 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Radeon HD 7870
Radeon HD 7970
5405
Radeon HD 7870
4779
Radeon HD 7970
Radeon HD 7870
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Tahiti XT
Pitcairn XT
Market segment
Desktop
Desktop
Release date
December 2011
March 2012
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
2x 6-pin
Boost clock speed
925 MHz
-
Core clock speed
-
1000 MHz
Floating-point performance
3,789 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
2800 Million
Pipelines / CUDA cores
2048
1280
Power consumption (TDP)
300 Watt
175 Watt
Texture fill rate
118.4
80.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
2 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1375 MHz
4800 MHz
Memory bandwidth
264 GB/s
153.6 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
+
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_1)
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
-
1.2.131
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-