NVIDIA A40 PCIe vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA A40 PCIe NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 48GB VRAM A40 PCIe and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA A40 PCIe 's Advantages

Released 7 years and 6 months late

Boost Clock1740MHz

More VRAM (48GB vs 1GB)

Larger VRAM bandwidth (695.8GB/s vs 64.00GB/s)

10176 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 300W)

Score

Benchmark

FP32 (float)

A40 PCIe +3843%

37.42 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

A40 PCIe

VS

GeForce GTX 645 OEM

Graphics Card

Oct 2020

Release Date

Apr 2013

Tesla

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1305 MHz

Base Clock

-

1740 MHz

Boost Clock

-

1812 MHz

Memory Clock

1000 MHz

Memory

48GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

128bit

695.8GB/s

Bandwidth

64.00GB/s

Render Config

84

SM Count

-

Compute Units

-

10752

Shading Units

576

336

TMUs

48

112

ROPs

16

336

Tensor Cores

-

84

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per SMX)

6 MB

L2 Cache

256 KB

Theoretical Performance

194.9 GPixel/s

Pixel Rate

9.888 GPixel/s

584.6 GTexel/s

Texture Rate

39.55 GTexel/s

37.42 TFLOPS

FP16 (half)

-

37.42 TFLOPS

FP32 (float)

949.2 GFLOPS

584.6 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

GA102

GPU Name

GK106

-

GPU Variant

GK106-200-A1

Ampere

Architecture

Kepler

Samsung

Foundry

TSMC

8 nm

Process Size

28 nm

28.3 billion

Transistors

2.54 billion

628 mm²

Die Size

221 mm²

Board Design

300W

TDP

65W

700 W

Suggested PSU

250 W

3x DisplayPort 1.4a

Outputs

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

8-pin EPS

Power Connectors

None

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

8.6

CUDA

3.0

6.6

Shader Model

5.1

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