Radeon HD 7870 and Radeon HD 6450A - video card comparison
Passmark - benchmark score Radeon HD 7870 vs Radeon HD 6450A
Radeon HD 7870
4779
Radeon HD 6450A
268
Radeon HD 7870
Radeon HD 6450A
Architecture
GCN (2011−2017)
TeraScale 2 (2009−2015)
GPU code name
Pitcairn XT
Caicos
Market segment
Desktop
Desktop
Release date
March 2012
April 2011
Interface
PCIe 3.0 x16
MXM-A (3.0)
Supplementary power connectors
2x 6-pin
-
Core clock speed
1000 MHz
625 MHz
Floating-point performance
-
200 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2800 Million
370 million
Pipelines / CUDA cores
1280
160
Power consumption (TDP)
175 Watt
25 Watt
Texture fill rate
80.00
5.000
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
64 Bit
Memory clock speed
4800 MHz
1066 MHz
Memory bandwidth
153.6 GB/s
8.528 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
11.2 (11_0)
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.2.131
N/A