AMD Radeon RX 580X vs AMD Radeon HD 6450

VS

AMD Radeon RX 580X

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 580X and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 580X 's Advantages

Released 7 years late

Boost Clock1340MHz

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (256.0GB/s vs 25.60GB/s)

2144 additional rendering cores

AMD Radeon HD 6450 's Advantages

Lower TDP (18W vs 185W)

Score

Benchmark

FP32 (float)

Radeon RX 580X +2987%

6.175 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon RX 580X

VS

Radeon HD 6450

Graphics Card

Apr 2018

Release Date

Apr 2011

Polaris

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1257 MHz

Base Clock

-

1340 MHz

Boost Clock

-

2000 MHz

Memory Clock

800 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

64bit

256.0GB/s

Bandwidth

25.60GB/s

Render Config

36

Compute Units

2

-

2304

Shading Units

160

144

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

128 KB

-

Theoretical Performance

42.88 GPixel/s

Pixel Rate

2.500 GPixel/s

193.0 GTexel/s

Texture Rate

5.000 GTexel/s

6.175 TFLOPS

FP16 (half)

-

6.175 TFLOPS

FP32 (float)

200.0 GFLOPS

385.9 GFLOPS

FP64 (double)

-

Board Design

185W

TDP

18W

450 W

Suggested PSU

200 W

1x HDMI 2.0b 3x DisplayPort 1.4a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 8-pin

Power Connectors

None

Graphics Processor

Polaris 20

GPU Name

Caicos

Polaris 20 XTX (215-0910038)

GPU Variant

Caicos PRO

GCN 4.0

Architecture

TeraScale 2

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

40 nm

5.7 billion

Transistors

0.37 billion

232 mm²

Die Size

67 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

Vulkan

N/A

-

6.4

Shader Model

5.0

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