NVIDIA GeForce GTX 780 Rev. 2 vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce GTX 780 Rev. 2

NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 Rev. 2 and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 780 Rev. 2 's Advantages

Boost Clock902MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (288.4GB/s vs 64.00GB/s)

1728 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 780 Rev. 2 +337%

4.156 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce GTX 780 Rev. 2

VS

GeForce GTX 645 OEM

Graphics Card

Sep 2013

Release Date

Apr 2013

GeForce 700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

863 MHz

Base Clock

-

902 MHz

Boost Clock

-

1502 MHz

Memory Clock

1000 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

288.4GB/s

Bandwidth

64.00GB/s

Render Config

-

2304

Shading Units

576

192

TMUs

48

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

1536 KB

L2 Cache

256 KB

-

Theoretical Performance

43.30 GPixel/s

Pixel Rate

9.888 GPixel/s

173.2 GTexel/s

Texture Rate

39.55 GTexel/s

-

4.156 TFLOPS

FP32 (float)

949.2 GFLOPS

173.2 GFLOPS

FP64 (double)

39.55 GFLOPS

Board Design

250W

TDP

65W

600 W

Suggested PSU

250 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

GK110B

GPU Name

GK106

GK110-300-B1

GPU Variant

GK106-200-A1

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

7.08 billion

Transistors

2.54 billion

561 mm²

Die Size

221 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.5

CUDA

3.0

5.1

Shader Model

5.1

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