NVIDIA GeForce GTX 680 Mac Edition vs NVIDIA GeForce GT 640

VS

NVIDIA GeForce GTX 680 Mac Edition

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 680 Mac Edition and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 680 Mac Edition 's Advantages

Released 10 months late

Boost Clock1058MHz

Larger VRAM bandwidth (192.3GB/s vs 28.51GB/s)

1152 additional rendering cores

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 195W)

Score

Benchmark

FP32 (float)

GeForce GTX 680 Mac Edition +368%

3.25 TFLOPS

GeForce GT 640

0.693 TFLOPS

GeForce GTX 680 Mac Edition

VS

GeForce GT 640

Graphics Card

Apr 2013

Release Date

Jun 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1006 MHz

Base Clock

-

1058 MHz

Boost Clock

-

1502 MHz

Memory Clock

891 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

192.3GB/s

Bandwidth

28.51GB/s

Render Config

-

1536

Shading Units

384

128

TMUs

32

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

33.86 GPixel/s

Pixel Rate

7.216 GPixel/s

135.4 GTexel/s

Texture Rate

28.86 GTexel/s

-

3.250 TFLOPS

FP32 (float)

692.7 GFLOPS

135.4 GFLOPS

FP64 (double)

28.86 GFLOPS

Board Design

195W

TDP

65W

450 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

2x 6-pin

Power Connectors

None

Graphics Processor

GK104

GPU Name

GK107

GK104-400-A2

GPU Variant

GK107-300-A2

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

3.54 billion

Transistors

1.27 billion

294 mm²

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.0

5.1

Shader Model

5.1

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