NVIDIA T400 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA T400

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 2GB VRAM T400 and 1536MB VRAM GeForce GT 640 OEM Rebrand to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA T400 's Advantages

Released 9 years and 1 months late

Boost Clock1425MHz

More VRAM (2GB vs 1536GB)

Larger VRAM bandwidth (80.00GB/s vs 38.40GB/s)

240 additional rendering cores

Lower TDP (30W vs 75W)

Score

Benchmark

FP32 (float)

T400 +163%

1.094 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

T400

VS

GeForce GT 640 OEM Rebrand

Graphics Card

May 2021

Release Date

Apr 2012

Quadro

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

420 MHz

Base Clock

-

1425 MHz

Boost Clock

-

1250 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

1536MB

GDDR6

Memory Type

DDR3

64bit

Memory Bus

192bit

80.00GB/s

Bandwidth

38.40GB/s

Render Config

-

6

SM Count

3

384

Shading Units

144

24

TMUs

24

16

ROPs

24

-

64 KB (per SM)

L1 Cache

64 KB (per SM)

1024 KB

L2 Cache

384 KB

-

Theoretical Performance

22.80 GPixel/s

Pixel Rate

4.320 GPixel/s

34.20 GTexel/s

Texture Rate

17.28 GTexel/s

2.189 TFLOPS

FP16 (half)

-

1094 GFLOPS

FP32 (float)

414.7 GFLOPS

34.20 GFLOPS

FP64 (double)

34.56 GFLOPS

Board Design

30W

TDP

75W

200 W

Suggested PSU

250 W

3x mini-DisplayPort 1.4a

Outputs

2x DVI 1x mini-HDMI 1.3a

None

Power Connectors

None

Graphics Processor

TU117

GPU Name

GF116

-

GPU Variant

GF116-150-A1

Turing

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

12 nm

Process Size

40 nm

4.7 billion

Transistors

1.17 billion

200 mm²

Die Size

238 mm²

Graphics Features

12 (12_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

1.1

1.3

Vulkan

N/A

7.5

CUDA

2.1

6.6

Shader Model

5.1

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