NVIDIA GeForce GTX 645 OEM vs AMD Radeon RX 455 OEM

VS

NVIDIA GeForce GTX 645 OEM

AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GTX 645 OEM and 2GB VRAM Radeon RX 455 OEM 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 100W)

AMD Radeon RX 455 OEM 's Advantages

Released 3 years and 2 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (104.0GB/s vs 64.00GB/s)

192 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon RX 455 OEM +69%

1.613 TFLOPS

GeForce GTX 645 OEM

VS

Radeon RX 455 OEM

Graphics Card

Apr 2013

Release Date

Jun 2016

GeForce 600

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

1625 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

64.00GB/s

Bandwidth

104.0GB/s

Render Config

-

Compute Units

12

-

576

Shading Units

768

48

TMUs

48

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

9.888 GPixel/s

Pixel Rate

16.80 GPixel/s

39.55 GTexel/s

Texture Rate

50.40 GTexel/s

-

949.2 GFLOPS

FP32 (float)

1.613 TFLOPS

39.55 GFLOPS

FP64 (double)

100.8 GFLOPS

Board Design

65W

TDP

100W

250 W

Suggested PSU

300 W

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

Outputs

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

None

Power Connectors

1x 6-pin

Graphics Processor

GK106

GPU Name

Tobago

GK106-200-A1

GPU Variant

Tobago PRO (215-0875010)

Kepler

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.54 billion

Transistors

2.08 billion

221 mm²

Die Size

160 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.0

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

6.3

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