NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce GTX 980

VS

NVIDIA GeForce GT 640 Rev. 2 NVIDIA GeForce GTX 980

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 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 Rev. 2 's Advantages

Lower TDP (49W vs 165W)

NVIDIA GeForce GTX 980 's Advantages

Released 1 years and 4 months late

Boost Clock1216MHz

More VRAM (4GB vs 1GB)

Larger VRAM bandwidth (224.4GB/s vs 40.06GB/s)

1664 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 640 Rev. 2

0.803 TFLOPS

GeForce GTX 980 +520%

4.981 TFLOPS

GeForce GT 640 Rev. 2

VS

GeForce GTX 980

Graphics Card

May 2013

Release Date

Sep 2014

GeForce 600

Generation

GeForce 900

Desktop

Type

Desktop

PCIe 2.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

1127 MHz

-

Boost Clock

1216 MHz

1252 MHz

Memory Clock

1753 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

256bit

40.06GB/s

Bandwidth

224.4GB/s

Render Config

-

SM Count

-

Compute Units

-

384

Shading Units

2048

32

TMUs

128

8

ROPs

64

-

Tensor Cores

-

RT Cores

-

16 KB (per SMX)

L1 Cache

48 KB (per SMM)

512 KB

L2 Cache

2 MB

Theoretical Performance

8.368 GPixel/s

Pixel Rate

77.82 GPixel/s

33.47 GTexel/s

Texture Rate

155.6 GTexel/s

-

FP16 (half)

-

803.3 GFLOPS

FP32 (float)

4.981 TFLOPS

33.47 GFLOPS

FP64 (double)

155.6 GFLOPS

Graphics Processor

GK208

GPU Name

GM204

GK208-400-A1

GPU Variant

GM204-400-A1

Kepler 2.0

Architecture

Maxwell 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.02 billion

Transistors

5.2 billion

87 mm²

Die Size

398 mm²

Board Design

49W

TDP

165W

200 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.4a 1x VGA

Outputs

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

None

Power Connectors

2x 6-pin

Graphics Features

12 (11_0)

DirectX

12 (12_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.3

3.5

CUDA

5.2

5.1

Shader Model

6.4

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