NVIDIA GeForce GTX 980 Ti vs NVIDIA GeForce GTX 645 OEM

VS

NVIDIA GeForce GTX 980 Ti NVIDIA GeForce GTX 645 OEM

We compared two Desktop platform GPUs: 6GB VRAM GeForce GTX 980 Ti and 1024MB VRAM GeForce GTX 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 980 Ti 's Advantages

Released 2 years and 2 months late

Boost Clock1076MHz

More VRAM (6GB vs 1GB)

Larger VRAM bandwidth (336.6GB/s vs 64.00GB/s)

2240 additional rendering cores

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 250W)

Score

Benchmark

FP32 (float)

GeForce GTX 980 Ti +538%

6.06 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce GTX 980 Ti

VS

GeForce GTX 645 OEM

Graphics Card

Jun 2015

Release Date

Apr 2013

GeForce 900

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1076 MHz

Boost Clock

-

1753 MHz

Memory Clock

1000 MHz

Memory

6GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

336.6GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

Compute Units

-

2816

Shading Units

576

176

TMUs

48

96

ROPs

16

-

Tensor Cores

-

RT Cores

-

48 KB (per SMM)

L1 Cache

16 KB (per SMX)

3 MB

L2 Cache

256 KB

Theoretical Performance

103.3 GPixel/s

Pixel Rate

9.888 GPixel/s

189.4 GTexel/s

Texture Rate

39.55 GTexel/s

-

FP16 (half)

-

6.060 TFLOPS

FP32 (float)

949.2 GFLOPS

189.4 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

GM200

GPU Name

GK106

GM200-310-A1

GPU Variant

GK106-200-A1

Maxwell 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

8 billion

Transistors

2.54 billion

601 mm²

Die Size

221 mm²

Board Design

250W

TDP

65W

600 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Features

12 (12_1)

DirectX

12 (11_0)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.3

Vulkan

1.1

5.2

CUDA

3.0

6.4

Shader Model

5.1

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