NVIDIA GeForce GTX 1080 vs NVIDIA GeForce GT 645 OEM

VS

NVIDIA GeForce GTX 1080

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 8GB VRAM GeForce GTX 1080 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 1080 's Advantages

Released 4 years and 1 months late

Boost Clock1733MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (320.3GB/s vs 91.87GB/s)

2272 additional rendering cores

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 180W)

Score

Benchmark

FP32 (float)

GeForce GTX 1080 +892%

8.873 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

GeForce GTX 1080

VS

GeForce GT 645 OEM

Graphics Card

May 2016

Release Date

Apr 2012

GeForce 10

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1607 MHz

Base Clock

-

1733 MHz

Boost Clock

-

1251 MHz

Memory Clock

957 MHz

Memory

8GB

Memory Size

1024MB

GDDR5X

Memory Type

GDDR5

256bit

Memory Bus

192bit

320.3GB/s

Bandwidth

91.87GB/s

Render Config

-

20

SM Count

6

2560

Shading Units

288

160

TMUs

48

64

ROPs

24

-

48 KB (per SM)

L1 Cache

64 KB (per SM)

2 MB

L2 Cache

384 KB

-

Theoretical Performance

110.9 GPixel/s

Pixel Rate

9.312 GPixel/s

277.3 GTexel/s

Texture Rate

37.25 GTexel/s

138.6 GFLOPS

FP16 (half)

-

8.873 TFLOPS

FP32 (float)

894.0 GFLOPS

277.3 GFLOPS

FP64 (double)

74.50 GFLOPS

Board Design

180W

TDP

102W

450 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

1x 8-pin

Power Connectors

-

Graphics Processor

GP104

GPU Name

GF114

GP104-400-A1

GPU Variant

-

Pascal

Architecture

Fermi 2.0

TSMC

Foundry

TSMC

16 nm

Process Size

40 nm

7.2 billion

Transistors

1.95 billion

314 mm²

Die Size

332 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

6.1

CUDA

2.1

6.4

Shader Model

5.1

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