NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 950

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 950

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 2GB VRAM GeForce GTX 950 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 640 's Advantages

Lower TDP (65W vs 90W)

NVIDIA GeForce GTX 950 's Advantages

Released 3 years and 2 months late

Boost Clock1188MHz

Larger VRAM bandwidth (105.8GB/s vs 28.51GB/s)

384 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 950 +163%

1.825 TFLOPS

GeForce GT 640

VS

GeForce GTX 950

Graphics Card

Jun 2012

Release Date

Aug 2015

GeForce 600

Generation

GeForce 900

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1024 MHz

-

Boost Clock

1188 MHz

891 MHz

Memory Clock

1653 MHz

Memory

2GB

Memory Size

2GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.51GB/s

Bandwidth

105.8GB/s

Render Config

-

384

Shading Units

768

32

TMUs

48

16

ROPs

32

-

16 KB (per SMX)

L1 Cache

48 KB (per SMM)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

38.02 GPixel/s

28.86 GTexel/s

Texture Rate

57.02 GTexel/s

-

692.7 GFLOPS

FP32 (float)

1.825 TFLOPS

28.86 GFLOPS

FP64 (double)

57.02 GFLOPS

Board Design

65W

TDP

90W

250 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 2.0 3x DisplayPort 1.4a

None

Power Connectors

1x 6-pin

Graphics Processor

GK107

GPU Name

GM206

GK107-300-A2

GPU Variant

GM206-250-A1

Kepler

Architecture

Maxwell 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

2.94 billion

118 mm²

Die Size

228 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

5.2

5.1

Shader Model

6.4

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