NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 980

VS

NVIDIA GeForce GT 640

NVIDIA GeForce GTX 980

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 4GB VRAM GeForce GTX 980 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 165W)

NVIDIA GeForce GTX 980 's Advantages

Released 2 years and 3 months late

Boost Clock1216MHz

More VRAM (4GB vs 2GB)

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

1664 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

GeForce GTX 980 +618%

4.981 TFLOPS

GeForce GT 640

VS

GeForce GTX 980

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

1127 MHz

-

Boost Clock

1216 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

2048

32

TMUs

128

16

ROPs

64

-

16 KB (per SMX)

L1 Cache

48 KB (per SMM)

256 KB

L2 Cache

2 MB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

77.82 GPixel/s

28.86 GTexel/s

Texture Rate

155.6 GTexel/s

-

692.7 GFLOPS

FP32 (float)

4.981 TFLOPS

28.86 GFLOPS

FP64 (double)

155.6 GFLOPS

Board Design

65W

TDP

165W

250 W

Suggested PSU

450 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

GM204-400-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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