GeForce GTX 275 and Radeon HD 4855 - video card comparison
GeForce GTX 275
Radeon HD 4855
Architecture
Tesla 2.0 (2007−2013)
TeraScale (2005−2013)
GPU code name
GT200B
RV770
Market segment
Desktop
Desktop
Release date
January 2009
January 2010
Bus support
PCI-E 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
SLI options
+
-
Core clock speed
633 MHz
575 MHz
CUDA cores
240
-
Floating-point performance
673.9 gflops
736.0 gflops
Manufacturing process technology
55 nm
55 nm
Number of transistors
1,400 million
956 million
Pipelines / CUDA cores
240
640
Power consumption (TDP)
219 Watt
110 Watt
Maximum GPU temperature
105 °C
-
Texture fill rate
50.6 billion/sec
18.40
Memory type
GDDR3
GDDR5
Maximum RAM amount
896 MB
512 MB
Memory bus width
448 Bit
256 Bit
Memory clock speed
1134 MHz
3600 MHz
Memory bandwidth
127.0 GB/s
115.2 GB/s
Display Connectors
Two Dual Link DVI
1x DVI, 1x HDMI, 1x VGA
Multi monitor support
+
-
HDMI
-
+
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
S/PDIF
-
DirectX
11.1 (10_0)
10.1 (10_1)
CUDA
+
-
OpenCL
1.1
1.1
OpenGL
3.0
3.3
Shader Model
4.0
4.1
Vulkan
N/A
N/A