Radeon HD 7970 and Radeon HD 4870 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Radeon HD 4870
Radeon HD 7970
5405
Radeon HD 4870
1411
Radeon HD 7970
Radeon HD 4870
Architecture
GCN (2011−2017)
TeraScale (2005−2013)
GPU code name
Tahiti XT
RV770
Market segment
Desktop
Desktop
Release date
December 2011
June 2008
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
2x 6-pin
Boost clock speed
925 MHz
-
Core clock speed
-
750 MHz
Floating-point performance
3,789 gflops
1,200.0 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
4,313 million
956 million
Pipelines / CUDA cores
2048
800
Power consumption (TDP)
300 Watt
150 Watt
Texture fill rate
118.4
30.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
1 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1375 MHz
3600 MHz
Memory bandwidth
264 GB/s
115.2 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
+
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
10.1 (10_1)
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
-
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-