NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GT 420 OEM

VS

NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GT 420 OEM

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM 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 GTX 645 OEM 's Advantages

Released 2 years and 7 months late

Larger VRAM bandwidth (64.00GB/s vs 28.80GB/s)

528 additional rendering cores

NVIDIA GeForce GT 420 OEM 's Advantages

Lower TDP (50W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM +608%

0.949 TFLOPS

GeForce GT 420 OEM

0.134 TFLOPS

GeForce GTX 645 OEM

VS

GeForce GT 420 OEM

Graphics Card

Apr 2013

Release Date

Sep 2010

GeForce 600

Generation

GeForce 400

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

28.80GB/s

Render Config

-

SM Count

1

576

Shading Units

48

TMUs

4

16

ROPs

4

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

9.888 GPixel/s

Pixel Rate

1.400 GPixel/s

39.55 GTexel/s

Texture Rate

2.800 GTexel/s

-

949.2 GFLOPS

FP32 (float)

134.4 GFLOPS

39.55 GFLOPS

FP64 (double)

11.20 GFLOPS

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 Processor

GK106

GPU Name

GF108

GK106-200-A1

GPU Variant

GF108-200-A1

Kepler

Architecture

Fermi

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.54 billion

Transistors

0.585 billion

221 mm²

Die Size

116 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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