GeForce GTX 275 and GeForce GTX 645 OEM - video card comparison

GeForce GTX 275

GeForce GTX 645 OEM

Architecture

Tesla 2.0 (2007−2013)

Kepler (2012−2018)

GPU code name

GT200B

GK106

Market segment

Desktop

Desktop

Release date

January 2009

April 2013

Bus support

PCI-E 2.0

-

Interface

PCIe 2.0 x16

PCIe 3.0 x16

Supplementary power connectors

2x 6-pin

None

SLI options

+

-

Core clock speed

633 MHz

824 MHz

CUDA cores

240

-

Floating-point performance

673.9 gflops

949.2 gflops

Manufacturing process technology

55 nm

28 nm

Number of transistors

1,400 million

2,540 million

Pipelines / CUDA cores

240

576

Power consumption (TDP)

219 Watt

65 Watt

Maximum GPU temperature

105 °C

-

Texture fill rate

50.6 billion/sec

39.55

Memory type

GDDR3

GDDR5

Maximum RAM amount

896 MB

1 GB

Memory bus width

448 Bit

128 Bit

Memory clock speed

1134 MHz

4000 MHz

Memory bandwidth

127.0 GB/s

64 GB/s

Display Connectors

Two Dual Link DVI

1x DVI, 1x HDMI, 1x DisplayPort

Multi monitor support

+

-

HDMI

-

+

Maximum VGA resolution

2048x1536

-

Audio input for HDMI

S/PDIF

-

DirectX

11.1 (10_0)

12 (11_0)

CUDA

+

3.0

OpenCL

1.1

1.2

OpenGL

3.0

4.6

Shader Model

4.0

5.1

Vulkan

N/A

1.1.126