NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 780 Ti

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 780 Ti

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 3GB VRAM GeForce GTX 780 Ti 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 Ti 's Advantages

Released 1 years and 5 months late

Boost Clock928MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (336.6GB/s vs 28.51GB/s)

2496 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 780 Ti +671%

5.345 TFLOPS

Blender

GeForce GT 640

32

GeForce GTX 780 Ti +1003%

353

OctaneBench

GeForce GT 640

8

GeForce GTX 780 Ti +1187%

103

GeForce GT 640

VS

GeForce GTX 780 Ti

Graphics Card

Jun 2012

Release Date

Nov 2013

GeForce 600

Generation

GeForce 700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

875 MHz

-

Boost Clock

928 MHz

891 MHz

Memory Clock

1753 MHz

Memory

2GB

Memory Size

3GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

384bit

28.51GB/s

Bandwidth

336.6GB/s

Render Config

-

384

Shading Units

2880

32

TMUs

240

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

55.68 GPixel/s

28.86 GTexel/s

Texture Rate

222.7 GTexel/s

-

692.7 GFLOPS

FP32 (float)

5.345 TFLOPS

28.86 GFLOPS

FP64 (double)

222.7 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

GK110-425-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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