NVIDIA GeForce GT 640 vs NVIDIA T400

VS

NVIDIA GeForce GT 640

NVIDIA T400

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

Main Differences

NVIDIA T400 's Advantages

Released 8 years and 11 months late

Boost Clock1425MHz

Larger VRAM bandwidth (80.00GB/s vs 28.51GB/s)

Lower TDP (30W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

T400 +57%

1.094 TFLOPS

GeForce GT 640

VS

T400

Graphics Card

Jun 2012

Release Date

May 2021

GeForce 600

Generation

Quadro

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

420 MHz

-

Boost Clock

1425 MHz

891 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR6

128bit

Memory Bus

64bit

28.51GB/s

Bandwidth

80.00GB/s

Render Config

-

SM Count

6

384

Shading Units

384

32

TMUs

24

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

64 KB (per SM)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

22.80 GPixel/s

28.86 GTexel/s

Texture Rate

34.20 GTexel/s

-

FP16 (half)

2.189 TFLOPS

692.7 GFLOPS

FP32 (float)

1094 GFLOPS

28.86 GFLOPS

FP64 (double)

34.20 GFLOPS

Board Design

65W

TDP

30W

250 W

Suggested PSU

200 W

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

Outputs

3x mini-DisplayPort 1.4a

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

TU117

GK107-300-A2

GPU Variant

-

Kepler

Architecture

Turing

TSMC

Foundry

TSMC

28 nm

Process Size

12 nm

1.27 billion

Transistors

4.7 billion

118 mm²

Die Size

200 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.0

CUDA

7.5

5.1

Shader Model

6.6

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