NVIDIA T400 4 GB vs NVIDIA GeForce GT 640 Rev. 2

VS

NVIDIA T400 4 GB NVIDIA GeForce GT 640 Rev. 2

We compared two Desktop platform GPUs: 4GB VRAM T400 4 GB and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA T400 4 GB 's Advantages

Released 8 years late

Boost Clock1425MHz

More VRAM (4GB vs 1GB)

Larger VRAM bandwidth (80.00GB/s vs 40.06GB/s)

Lower TDP (30W vs 49W)

Score

Benchmark

FP32 (float)

T400 4 GB +36%

1.094 TFLOPS

GeForce GT 640 Rev. 2

0.803 TFLOPS

T400 4 GB

VS

GeForce GT 640 Rev. 2

Graphics Card

May 2021

Release Date

May 2013

Quadro

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x8

Clock Speeds

420 MHz

Base Clock

-

1425 MHz

Boost Clock

-

1250 MHz

Memory Clock

1252 MHz

Memory

4GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

64bit

Memory Bus

64bit

80.00GB/s

Bandwidth

40.06GB/s

Render Config

6

SM Count

-

Compute Units

-

384

Shading Units

384

24

TMUs

32

16

ROPs

8

-

Tensor Cores

-

RT Cores

-

64 KB (per SM)

L1 Cache

16 KB (per SMX)

1024 KB

L2 Cache

512 KB

Theoretical Performance

22.80 GPixel/s

Pixel Rate

8.368 GPixel/s

34.20 GTexel/s

Texture Rate

33.47 GTexel/s

2.189 TFLOPS

FP16 (half)

-

1094 GFLOPS

FP32 (float)

803.3 GFLOPS

34.20 GFLOPS

FP64 (double)

33.47 GFLOPS

Graphics Processor

TU117

GPU Name

GK208

-

GPU Variant

GK208-400-A1

Turing

Architecture

Kepler 2.0

TSMC

Foundry

TSMC

12 nm

Process Size

28 nm

4.7 billion

Transistors

1.02 billion

200 mm²

Die Size

87 mm²

Board Design

30W

TDP

49W

200 W

Suggested PSU

200 W

3x mini-DisplayPort 1.4a

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

None

Power Connectors

None

Graphics Features

12 (12_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

7.5

CUDA

3.5

6.6

Shader Model

5.1

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