NVIDIA GeForce GTX 950 vs NVIDIA GeForce GT 640 OEM Rebrand

VS

NVIDIA GeForce GTX 950

NVIDIA GeForce GT 640 OEM Rebrand

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 950 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 GeForce GTX 950 's Advantages

Released 3 years and 4 months late

Boost Clock1188MHz

More VRAM (2GB vs 1536GB)

Larger VRAM bandwidth (105.8GB/s vs 38.40GB/s)

624 additional rendering cores

NVIDIA GeForce GT 640 OEM Rebrand 's Advantages

Lower TDP (75W vs 90W)

Score

Benchmark

FP32 (float)

GeForce GTX 950 +339%

1.825 TFLOPS

GeForce GT 640 OEM Rebrand

0.415 TFLOPS

GeForce GTX 950

VS

GeForce GT 640 OEM Rebrand

Graphics Card

Aug 2015

Release Date

Apr 2012

GeForce 900

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1024 MHz

Base Clock

-

1188 MHz

Boost Clock

-

1653 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

1536MB

GDDR5

Memory Type

DDR3

128bit

Memory Bus

192bit

105.8GB/s

Bandwidth

38.40GB/s

Render Config

-

SM Count

3

768

Shading Units

144

48

TMUs

24

32

ROPs

24

-

48 KB (per SMM)

L1 Cache

64 KB (per SM)

1024 KB

L2 Cache

384 KB

-

Theoretical Performance

38.02 GPixel/s

Pixel Rate

4.320 GPixel/s

57.02 GTexel/s

Texture Rate

17.28 GTexel/s

-

1.825 TFLOPS

FP32 (float)

414.7 GFLOPS

57.02 GFLOPS

FP64 (double)

34.56 GFLOPS

Board Design

90W

TDP

75W

250 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 6-pin

Power Connectors

None

Graphics Processor

GM206

GPU Name

GF116

GM206-250-A1

GPU Variant

GF116-150-A1

Maxwell 2.0

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.94 billion

Transistors

1.17 billion

228 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

5.2

CUDA

2.1

6.4

Shader Model

5.1

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