NVIDIA GeForce GTX 460 X2 vs NVIDIA GeForce GT 640

VS

NVIDIA GeForce GTX 460 X2

NVIDIA GeForce GT 640

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 460 X2 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 460 X2 's Advantages

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

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)

Score

Benchmark

FP32 (float)

GeForce GTX 460 X2 +35%

0.942 TFLOPS

GeForce GT 640

0.693 TFLOPS

GeForce GTX 460 X2

VS

GeForce GT 640

Graphics Card

Mar 2011

Release Date

Jun 2012

GeForce 400

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

900 MHz

Memory Clock

891 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

DDR3

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

28.51GB/s

Render Config

-

7

SM Count

-

336

Shading Units

384

56

TMUs

32

ROPs

16

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

9.814 GPixel/s

Pixel Rate

7.216 GPixel/s

39.26 GTexel/s

Texture Rate

28.86 GTexel/s

-

941.5 GFLOPS

FP32 (float)

692.7 GFLOPS

78.46 GFLOPS

FP64 (double)

28.86 GFLOPS

Board Design

160W

TDP

65W

450 W

Suggested PSU

250 W

3x DVI 1x mini-HDMI 1.3a

Outputs

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

2x 8-pin

Power Connectors

None

Graphics Processor

GF104

GPU Name

GK107

GF104-300-KB-A1

GPU Variant

GK107-300-A2

Fermi

Architecture

Kepler

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

1.95 billion

Transistors

1.27 billion

332 mm²

Die Size

118 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

1.1

OpenCL

3.0

N/A

Vulkan

1.1

2.1

CUDA

3.0

5.1

Shader Model

5.1

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