NVIDIA GeForce GTX 780 vs NVIDIA GeForce GT 640 Rev. 2

VS

NVIDIA GeForce GTX 780 NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 3GB VRAM GeForce GTX 780 and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 780 's Advantages

Boost Clock902MHz

More VRAM (3GB vs 1GB)

Larger VRAM bandwidth (288.4GB/s vs 40.06GB/s)

1920 additional rendering cores

NVIDIA GeForce GT 640 Rev. 2 's Advantages

Lower TDP (49W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 780 +417%

4.156 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

GeForce GTX 780

VS

GeForce GT 640 Rev. 2

Graphics Card

May 2013

Release Date

May 2013

GeForce 700

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

863 MHz

Base Clock

-

902 MHz

Boost Clock

-

1502 MHz

Memory Clock

1252 MHz

Memory

3GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

64bit

288.4GB/s

Bandwidth

40.06GB/s

Render Config

-

SM Count

-

Compute Units

-

2304

Shading Units

384

192

TMUs

32

48

ROPs

8

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

1536 KB

L2 Cache

512 KB

Theoretical Performance

43.30 GPixel/s

Pixel Rate

8.368 GPixel/s

173.2 GTexel/s

Texture Rate

33.47 GTexel/s

-

FP16 (half)

-

4.156 TFLOPS

FP32 (float)

803.3 GFLOPS

173.2 GFLOPS

FP64 (double)

33.47 GFLOPS

Graphics Processor

GK110

GPU Name

GK208

GK110-300-A1

GPU Variant

GK208-400-A1

Kepler

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

7.08 billion

Transistors

1.02 billion

561 mm²

Die Size

87 mm²

Board Design

250W

TDP

49W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.5

CUDA

3.5

5.1

Shader Model

5.1

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