Radeon HD 7770 and GeForce GTX 555 OEM - video card comparison
Radeon HD 7770
GeForce GTX 555 OEM
Architecture
GCN (2011−2017)
Fermi 2.0 (2010−2014)
GPU code name
Cape Verde
GF114
Market segment
Desktop
Desktop
Release date
February 2012
May 2011
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
2x 6-pin
Core clock speed
1000 MHz
736 MHz
Floating-point performance
-
847.9 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,500 million
1,950 million
Pipelines / CUDA cores
640
288
Power consumption (TDP)
80 Watt
150 Watt
Texture fill rate
40.00
35.33
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
192 Bit
Memory clock speed
4500 MHz
3828 MHz
Memory bandwidth
72 GB/s
91.87 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x mini-HDMI
Eyefinity
+
-
HDMI
+
+
DirectX
12 (11_1)
12 (11_0)
CUDA
-
2.1
OpenCL
1.2
1.1
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
N/A