NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 460 X2

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 460 X2

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM GeForce GTX 460 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Released 1 years and 3 months late

More VRAM (2GB vs 1024GB)

48 additional rendering cores

Lower TDP (65W vs 160W)

NVIDIA GeForce GTX 460 X2 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 28.51GB/s)

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 460 X2 +35%

0.942 TFLOPS

GeForce GT 640

VS

GeForce GTX 460 X2

Graphics Card

Jun 2012

Release Date

Mar 2011

GeForce 600

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

891 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

115.2GB/s

Render Config

-

SM Count

7

384

Shading Units

336

32

TMUs

56

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

9.814 GPixel/s

28.86 GTexel/s

Texture Rate

39.26 GTexel/s

-

692.7 GFLOPS

FP32 (float)

941.5 GFLOPS

28.86 GFLOPS

FP64 (double)

78.46 GFLOPS

Board Design

65W

TDP

160W

250 W

Suggested PSU

450 W

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

Outputs

3x DVI 1x mini-HDMI 1.3a

None

Power Connectors

2x 8-pin

Graphics Processor

GK107

GPU Name

GF104

GK107-300-A2

GPU Variant

GF104-300-KB-A1

Kepler

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

1.95 billion

118 mm²

Die Size

332 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

Vulkan

N/A

3.0

CUDA

2.1

5.1

Shader Model

5.1

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