Radeon HD 7870 XT and Radeon HD 6450 - video card comparison
Passmark - benchmark score Radeon HD 7870 XT vs Radeon HD 6450
Radeon HD 7870 XT
4603
Radeon HD 6450
203
Radeon HD 7870 XT
Radeon HD 6450
Architecture
GCN 1.0 (2012−2020)
TeraScale 2 (2009−2015)
GPU code name
Tahiti
Caicos
Market segment
Desktop
Desktop
Release date
November 2012
April 2011
Bus support
-
PCIe 2.0 x8
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
None
Boost clock speed
975 MHz
750 MHz
Core clock speed
925 MHz
-
Floating-point performance
2,995 gflops
200.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
370 million
Pipelines / CUDA cores
1536
160
Power consumption (TDP)
185 Watt
30 Watt
Texture fill rate
93.60
5.000
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
6000 MHz
800 MHz
Memory bandwidth
192.0 GB/s
25.6 GB/s
Memory bandwidth
-
8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5)
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
12 (11_1)
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.2.131
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-