NVIDIA GeForce GT 640 vs NVIDIA GeForce GT 420 OEM

VS

NVIDIA GeForce GT 640 NVIDIA GeForce GT 420 OEM

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM GeForce GT 420 OEM 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 9 months late

More VRAM (2GB vs 1GB)

336 additional rendering cores

NVIDIA GeForce GT 420 OEM 's Advantages

Larger VRAM bandwidth (28.80GB/s vs 28.51GB/s)

Lower TDP (50W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640 +417%

0.693 TFLOPS

GeForce GT 420 OEM

0.134 TFLOPS

GeForce GT 640

VS

GeForce GT 420 OEM

Graphics Card

Jun 2012

Release Date

Sep 2010

GeForce 600

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

891 MHz

Memory Clock

900 MHz

Memory

2GB

Memory Size

1024MB

DDR3

Memory Type

DDR3

128bit

Memory Bus

128bit

28.51GB/s

Bandwidth

28.80GB/s

Render Config

-

SM Count

1

-

Compute Units

-

384

Shading Units

48

32

TMUs

4

16

ROPs

4

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

Theoretical Performance

7.216 GPixel/s

Pixel Rate

1.400 GPixel/s

28.86 GTexel/s

Texture Rate

2.800 GTexel/s

-

FP16 (half)

-

692.7 GFLOPS

FP32 (float)

134.4 GFLOPS

28.86 GFLOPS

FP64 (double)

11.20 GFLOPS

Graphics Processor

GK107

GPU Name

GF108

GK107-300-A2

GPU Variant

GF108-200-A1

Kepler

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.27 billion

Transistors

0.585 billion

118 mm²

Die Size

116 mm²

Board Design

65W

TDP

50W

250 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

None

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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