NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 970

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 970

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 4GB VRAM GeForce GTX 970 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 148W)

NVIDIA GeForce GTX 970 's Advantages

Released 2 years and 3 months late

Boost Clock1178MHz

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (224.4GB/s vs 28.51GB/s)

1280 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 970 +465%

3.92 TFLOPS

Blender

GeForce GT 640

32

GeForce GTX 970 +853%

305

OctaneBench

GeForce GT 640

8

GeForce GTX 970 +862%

77

GeForce GT 640

VS

GeForce GTX 970

Graphics Card

Jun 2012

Release Date

Sep 2014

GeForce 600

Generation

GeForce 900

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1050 MHz

-

Boost Clock

1178 MHz

891 MHz

Memory Clock

1753 MHz

Memory

2GB

Memory Size

4GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

28.51GB/s

Bandwidth

224.4GB/s

Render Config

-

384

Shading Units

1664

32

TMUs

104

16

ROPs

56

-

16 KB (per SMX)

L1 Cache

48 KB (per SMM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

65.97 GPixel/s

28.86 GTexel/s

Texture Rate

122.5 GTexel/s

-

692.7 GFLOPS

FP32 (float)

3.920 TFLOPS

28.86 GFLOPS

FP64 (double)

122.5 GFLOPS

Board Design

65W

TDP

148W

250 W

Suggested PSU

300 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

2x 6-pin

Graphics Processor

GK107

GPU Name

GM204

GK107-300-A2

GPU Variant

GM204-200-A1

Kepler

Architecture

Maxwell 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.27 billion

Transistors

5.2 billion

118 mm²

Die Size

398 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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