Radeon HD 7970 GHz Edition and Radeon Sky 500 - video card comparison
Radeon HD 7970 GHz Edition
Radeon Sky 500
Architecture
GCN 1.0 (2012−2020)
GCN 1.0 (2012−2020)
GPU code name
Tahiti
Pitcairn
Market segment
Desktop
Desktop
Release date
June 2012
March 2013
Bus support
PCIe 2.1 x16
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin
Boost clock speed
1050 MHz
-
Core clock speed
-
950 MHz
Floating-point performance
4,301 gflops
2,432 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
2,800 million
Pipelines / CUDA cores
2048
1280
Power consumption (TDP)
250 Watt
150 Watt
Texture fill rate
134.4
76.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
4 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1500 MHz
4800 MHz
Memory bandwidth
288 GB/s
154 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DisplayPort
Eyefinity
1
-
DisplayPort count
-
1
Dual-link DVI support
-
1
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
-
-