GeForce GT 620 and Radeon R9 255 OEM - video card comparison

GeForce GT 620

Radeon R9 255 OEM

Architecture

Fermi (2010−2014)

GCN 1.0 (2012−2020)

GPU code name

GF108

Cape Verde

Market segment

Desktop

Desktop

Release date

May 2012

December 2013

Bus support

PCI Express 2.0

-

Interface

PCIe 2.0 x16

PCIe 3.0 x16

Supplementary power connectors

None

1x 6-pin

Boost clock speed

-

930 MHz

Core clock speed

700 MHz

900 MHz

CUDA cores

96

-

Floating-point performance

268.8 gflops

952.3 gflops

Manufacturing process technology

40 nm

28 nm

Number of transistors

585 million

1,500 million

Pipelines / CUDA cores

96

512

Power consumption (TDP)

49 Watt

65 Watt

Maximum GPU temperature

98 °C

-

Texture fill rate

11.2 billion/sec

29.76

Memory type

DDR3

GDDR5

Maximum RAM amount

1 GB

2 GB

Memory bus width

64 Bit

128 Bit

Memory clock speed

1.8 GB/s

4600 MHz

Memory bandwidth

14.4 GB/s

73.6 GB/s

Display Connectors

Dual Link DVI-I, HDMI, VGA

No outputs

Multi monitor support

+

-

HDMI

+

-

HDCP

+

-

Maximum VGA resolution

2048x1536

-

Audio input for HDMI

Internal

-

DirectX

12 (11_0)

12 (11_1)

CUDA

+

-

OpenCL

1.1

1.2

OpenGL

4.2

4.6

Shader Model

5.1

5.1

Vulkan

N/A

1.2.131

3D Blu-Ray

+

-