GeForce GTX 555 OEM and Radeon HD 6770M Mac Edition - video card comparison
GeForce GTX 555 OEM
Radeon HD 6770M Mac Edition
Architecture
Fermi 2.0 (2010−2014)
TeraScale 2 (2009−2015)
GPU code name
GF114
Whistler
Market segment
Desktop
Desktop
Release date
May 2011
January 2011
Interface
PCIe 2.0 x16
MXM-A (3.0)
Supplementary power connectors
2x 6-pin
-
Core clock speed
736 MHz
725 MHz
Floating-point performance
847.9 gflops
696.0 gflops
Manufacturing process technology
40 nm
40 nm
Number of transistors
1,950 million
716 million
Pipelines / CUDA cores
288
480
Power consumption (TDP)
150 Watt
35 Watt
Texture fill rate
35.33
17.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
192 Bit
128 Bit
Memory clock speed
3828 MHz
3600 MHz
Memory bandwidth
91.87 GB/s
57.6 GB/s
Display Connectors
2x DVI, 1x mini-HDMI
No outputs
HDMI
+
-
DirectX
12 (11_0)
11.2 (11_0)
CUDA
2.1
-
OpenCL
1.1
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
N/A
N/A