Radeon HD 7970 and Radeon HD 6450 - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Radeon HD 6450
Radeon HD 7970
5405
Radeon HD 6450
203
Radeon HD 7970
Radeon HD 6450
Architecture
GCN (2011−2017)
TeraScale 2 (2009−2015)
GPU code name
Tahiti XT
Caicos
Market segment
Desktop
Desktop
Release date
December 2011
April 2011
Bus support
PCIe 2.1 x16
PCIe 2.0 x8
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
925 MHz
750 MHz
Floating-point performance
3,789 gflops
200.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
370 million
Pipelines / CUDA cores
2048
160
Power consumption (TDP)
300 Watt
30 Watt
Texture fill rate
118.4
5.000
Memory type
GDDR5
GDDR5
Maximum RAM amount
6 GB
1 GB
Memory bus width
384 Bit
64 Bit
Memory clock speed
1375 MHz
800 MHz
Memory bandwidth
264 GB/s
25.6 GB/s
Memory bandwidth
-
8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5)
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 1x VGA
Eyefinity
+
1
Number of Eyefinity displays
-
4
HDMI
+
+
DisplayPort support
-
+
DirectX
DirectX® 11
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
AppAcceleration
-
-
CrossFire
1
1
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-