Radeon HD 6770 and GeForce GTX 555 OEM - video card comparison
Radeon HD 6770
GeForce GTX 555 OEM
Architecture
TeraScale 2 (2009−2015)
Fermi 2.0 (2010−2014)
GPU code name
Juniper
GF114
Market segment
Desktop
Desktop
Release date
January 2011
May 2011
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
-
736 MHz
Floating-point performance
1,360.0 gflops
847.9 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
1,040 million
1,950 million
Pipelines / CUDA cores
800
288
Power consumption (TDP)
108 Watt
150 Watt
Texture fill rate
34.00
35.33
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
128 Bit
192 Bit
Memory clock speed
1050 MHz
3828 MHz
Memory bandwidth
76.8 GB/s
91.87 GB/s
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x mini-HDMI
Eyefinity
1
-
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
2.1
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
-
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-