NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 650

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 650

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM GeForce GTX 650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

More VRAM (2GB vs 1024GB)

NVIDIA GeForce GTX 650 's Advantages

Larger VRAM bandwidth (80.00GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 650 +17%

0.812 TFLOPS

Blender

GeForce GT 640

32

GeForce GTX 650 +46%

47

OctaneBench

GeForce GT 640

8

GeForce GTX 650 +62%

13

GeForce GT 640

VS

GeForce GTX 650

Graphics Card

Jun 2012

Release Date

Sep 2012

GeForce 600

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

891 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.51GB/s

Bandwidth

80.00GB/s

Render Config

-

384

Shading Units

384

32

TMUs

32

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

8.464 GPixel/s

28.86 GTexel/s

Texture Rate

33.86 GTexel/s

-

692.7 GFLOPS

FP32 (float)

812.5 GFLOPS

28.86 GFLOPS

FP64 (double)

33.86 GFLOPS

Board Design

65W

TDP

65W

250 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x mini-HDMI 1.4a

None

Power Connectors

1x 6-pin

Graphics Processor

GK107

GPU Name

GK107

GK107-300-A2

GPU Variant

GK107-450-A2

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

1.27 billion

118 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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