Radeon HD 3870 X2 and Radeon HD 7870 - video card comparison
Passmark - benchmark score Radeon HD 3870 X2 vs Radeon HD 7870
Radeon HD 3870 X2
729
Radeon HD 7870
4779
Radeon HD 3870 X2
Radeon HD 7870
Architecture
TeraScale (2005−2013)
GCN (2011−2017)
GPU code name
R680
Pitcairn XT
Market segment
Desktop
Desktop
Release date
January 2008
March 2012
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
2x 6-pin
Core clock speed
825 MHz
1000 MHz
Floating-point performance
2x 528.0 gflops
-
Manufacturing process technology
55 nm
28 nm
Number of transistors
666 million
2800 Million
Pipelines / CUDA cores
320
1280
Power consumption (TDP)
165 Watt
175 Watt
Texture fill rate
13.20
80.00
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1802 MHz
4800 MHz
Memory bandwidth
57.66 GB/s
153.6 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
+
HDMI
-
+
DirectX
10.1 (10_1)
12 (11_1)
OpenCL
N/A
1.2
OpenGL
3.3
4.6
Shader Model
4.1
5.1
Vulkan
N/A
1.2.131