Radeon HD 4770 and Radeon HD 6870 - video card comparison
Passmark - benchmark score Radeon HD 4770 vs Radeon HD 6870
Radeon HD 4770
935
Radeon HD 6870
2285
Radeon HD 4770
Radeon HD 6870
Architecture
TeraScale (2005−2013)
Terascale 2 (2009−2015)
GPU code name
RV740
RV940 Barts
Market segment
Desktop
Desktop
Release date
April 2009
October 2010
Bus support
-
PCIe 2.0 x16
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
2x 6-pin
Boost clock speed
-
900 MHz
Core clock speed
750 MHz
-
Floating-point performance
960.0 gflops
2,016.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
826 million
1,700 million
Pipelines / CUDA cores
640
1120
Power consumption (TDP)
80 Watt
151 Watt
Texture fill rate
24.00
50.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
1 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
3200 MHz
1050 MHz
Memory bandwidth
51.2 GB/s
134.4 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
1
HDMI
-
+
DisplayPort support
-
-
DirectX
10.1 (10_1)
DirectX® 11
Mantle
-
-
OpenCL
1.1
1.2
OpenGL
3.3
4.4
Shader Model
4.1
5.0
Vulkan
N/A
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-