Radeon HD 7870 and Radeon HD 3870 - video card comparison
Passmark - benchmark score Radeon HD 7870 vs Radeon HD 3870
Radeon HD 7870
4779
Radeon HD 3870
572
Radeon HD 7870
Radeon HD 3870
Architecture
GCN (2011−2017)
TeraScale (2005−2013)
GPU code name
Pitcairn XT
RV670
Market segment
Desktop
Desktop
Release date
March 2012
November 2007
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
Core clock speed
1000 MHz
777 MHz
Floating-point performance
-
497.3 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
2800 Million
666 million
Pipelines / CUDA cores
1280
320
Power consumption (TDP)
175 Watt
106 Watt
Texture fill rate
80.00
12.43
Memory type
GDDR5
GDDR4
Maximum RAM amount
2 GB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
4800 MHz
2252 MHz
Memory bandwidth
153.6 GB/s
72.06 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
+
-
HDMI
+
-
DirectX
12 (11_1)
10.1 (10_1)
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.2.131
N/A