NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 780 6 GB

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 780 6 GB

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 6GB VRAM GeForce GTX 780 6 GB to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 250W)

NVIDIA GeForce GTX 780 6 GB 's Advantages

Released 1 years and 3 months late

Boost Clock902MHz

More VRAM (6GB vs 2GB)

Larger VRAM bandwidth (288.4GB/s vs 28.51GB/s)

1920 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 780 6 GB +499%

4.156 TFLOPS

GeForce GT 640

VS

GeForce GTX 780 6 GB

Graphics Card

Jun 2012

Release Date

Sep 2013

GeForce 600

Generation

GeForce 700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

863 MHz

-

Boost Clock

902 MHz

891 MHz

Memory Clock

1502 MHz

Memory

2GB

Memory Size

6GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

288.4GB/s

Render Config

-

384

Shading Units

2304

32

TMUs

192

16

ROPs

48

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

1536 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

43.30 GPixel/s

28.86 GTexel/s

Texture Rate

173.2 GTexel/s

-

692.7 GFLOPS

FP32 (float)

4.156 TFLOPS

28.86 GFLOPS

FP64 (double)

173.2 GFLOPS

Board Design

65W

TDP

250W

250 W

Suggested PSU

600 W

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

Outputs

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

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK107

GPU Name

GK110B

GK107-300-A2

GPU Variant

GK110-301-B1

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

7.08 billion

118 mm²

Die Size

561 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.5

5.1

Shader Model

5.1

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