Radeon HD 3870 X2 and Radeon HD 6770 - video card comparison
Passmark - benchmark score Radeon HD 3870 X2 vs Radeon HD 6770
Radeon HD 3870 X2
729
Radeon HD 6770
1286
Radeon HD 3870 X2
Radeon HD 6770
Architecture
TeraScale (2005−2013)
TeraScale 2 (2009−2015)
GPU code name
R680
Juniper
Market segment
Desktop
Desktop
Release date
January 2008
January 2011
Bus support
-
PCIe 2.0 x16
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin
Boost clock speed
-
900 MHz
Core clock speed
825 MHz
-
Floating-point performance
2x 528.0 gflops
1,360.0 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
666 million
1,040 million
Pipelines / CUDA cores
320
800
Power consumption (TDP)
165 Watt
108 Watt
Texture fill rate
13.20
34.00
Memory type
GDDR3
GDDR5
Maximum RAM amount
512 MB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1802 MHz
1050 MHz
Memory bandwidth
57.66 GB/s
76.8 GB/s
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
N/A
1.2
OpenGL
3.3
4.4
Shader Model
4.1
5.0
Vulkan
N/A
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-