Radeon HD 7970 and Radeon R7 265 - video card comparison
Radeon HD 7970
Radeon R7 265
Architecture
GCN (2011−2017)
GCN 1.0 (2012−2020)
GPU code name
Tahiti XT
Pitcairn
Market segment
Desktop
Desktop
Release date
December 2011
February 2014
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
1 x 6-pin
Boost clock speed
925 MHz
925 MHz
Floating-point performance
3,789 gflops
1,894 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
2,800 million
Pipelines / CUDA cores
2048
1024
Power consumption (TDP)
300 Watt
150 Watt
Texture fill rate
118.4
59.20
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
4 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
1375 MHz
1400 MHz
Memory bandwidth
264 GB/s
179.2 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
+
1
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
DirectX® 12
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
AppAcceleration
-
-
CrossFire
1
1
DDMA audio
-
+
Enduro
-
-
FreeSync
1
1
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-