NVIDIA GeForce GTX 645 OEM vs NVIDIA GeForce GTX 780 Ti 6 GB

VS

NVIDIA GeForce GTX 645 OEM

NVIDIA GeForce GTX 780 Ti 6 GB

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 6GB VRAM GeForce GTX 780 Ti 6 GB to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 645 OEM 's Advantages

Lower TDP (65W vs 250W)

NVIDIA GeForce GTX 780 Ti 6 GB 's Advantages

Boost Clock928MHz

More VRAM (6GB vs 1024GB)

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

2304 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM

0.949 TFLOPS

GeForce GTX 780 Ti 6 GB +463%

5.345 TFLOPS

GeForce GTX 645 OEM

VS

GeForce GTX 780 Ti 6 GB

Graphics Card

Apr 2013

Release Date

Unknown

GeForce 600

Generation

GeForce 700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

875 MHz

-

Boost Clock

928 MHz

1000 MHz

Memory Clock

1753 MHz

Memory

1024MB

Memory Size

6GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

64.00GB/s

Bandwidth

336.6GB/s

Render Config

-

576

Shading Units

2880

48

TMUs

240

16

ROPs

48

-

16 KB (per SMX)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

1536 KB

-

Theoretical Performance

9.888 GPixel/s

Pixel Rate

55.68 GPixel/s

39.55 GTexel/s

Texture Rate

222.7 GTexel/s

-

949.2 GFLOPS

FP32 (float)

5.345 TFLOPS

39.55 GFLOPS

FP64 (double)

222.7 GFLOPS

Board Design

65W

TDP

250W

250 W

Suggested PSU

600 W

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

Outputs

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

GK106

GPU Name

GK110B

GK106-200-A1

GPU Variant

-

Kepler

Architecture

Kepler

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

7.08 billion

221 mm²

Die Size

561 mm²

Graphics Features

12 (11_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

3.0

1.1

Vulkan

1.1

3.0

CUDA

3.5

5.1

Shader Model

5.1

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