NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GTX 745 OEM

VS

NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GTX 745 OEM

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 4GB VRAM GeForce GTX 745 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 645 OEM 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 28.80GB/s)

192 additional rendering cores

NVIDIA GeForce GTX 745 OEM 's Advantages

Released 10 months late

More VRAM (4GB vs 1024GB)

Lower TDP (55W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM +19%

0.949 TFLOPS

GeForce GTX 745 OEM

0.793 TFLOPS

GeForce GTX 645 OEM

VS

GeForce GTX 745 OEM

Graphics Card

Apr 2013

Release Date

Feb 2014

GeForce 600

Generation

GeForce 700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

28.80GB/s

Render Config

-

576

Shading Units

384

48

TMUs

24

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

64 KB (per SMM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

9.888 GPixel/s

Pixel Rate

16.53 GPixel/s

39.55 GTexel/s

Texture Rate

24.79 GTexel/s

-

949.2 GFLOPS

FP32 (float)

793.3 GFLOPS

39.55 GFLOPS

FP64 (double)

24.79 GFLOPS

Board Design

65W

TDP

55W

250 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x HDMI 2.0 1x VGA

None

Power Connectors

None

Graphics Processor

GK106

GPU Name

GM107

GK106-200-A1

GPU Variant

GM107-220-A2

Kepler

Architecture

Maxwell

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

1.87 billion

221 mm²

Die Size

148 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

5.0

5.1

Shader Model

5.1

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