Radeon HD 6870 and Radeon HD 4870 X2 - video card comparison
Passmark - benchmark score Radeon HD 6870 vs Radeon HD 4870 X2
Radeon HD 6870
2285
Radeon HD 4870 X2
1348
Radeon HD 6870
Radeon HD 4870 X2
Architecture
Terascale 2 (2009−2015)
TeraScale (2005−2013)
GPU code name
RV940 Barts
R700
Market segment
Desktop
Desktop
Release date
October 2010
August 2008
Bus support
PCIe 2.0 x16
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Boost clock speed
900 MHz
-
Core clock speed
-
700 MHz
Floating-point performance
2,016.0 gflops
2x 1,120.0 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
1,700 million
956 million
Pipelines / CUDA cores
1120
800
Power consumption (TDP)
151 Watt
286 Watt
Texture fill rate
50.40
28.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1050 MHz
3600 MHz
Memory bandwidth
134.4 GB/s
115.2 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
10.1 (10_1)
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.4
3.3
Shader Model
5.0
4.1
Vulkan
-
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-