AMD Radeon R9 280X vs AMD Radeon HD 6450

VS

AMD Radeon R9 280X

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X 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 R9 280X 's Advantages

Released 2 years and 6 months late

Boost Clock1000MHz

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (288.0GB/s vs 25.60GB/s)

1888 additional rendering cores

AMD Radeon HD 6450 's Advantages

Lower TDP (18W vs 250W)

Score

Benchmark

FP32 (float)

Radeon R9 280X +1948%

4.096 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon R9 280X

VS

Radeon HD 6450

Graphics Card

Oct 2013

Release Date

Apr 2011

Volcanic Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

850 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

64bit

288.0GB/s

Bandwidth

25.60GB/s

Render Config

32

Compute Units

2

-

2048

Shading Units

160

128

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

128 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

2.500 GPixel/s

128.0 GTexel/s

Texture Rate

5.000 GTexel/s

-

4.096 TFLOPS

FP32 (float)

200.0 GFLOPS

1024 GFLOPS

FP64 (double)

-

Board Design

250W

TDP

18W

600 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Tahiti

GPU Name

Caicos

Tahiti XTL (215-0821065)

GPU Variant

Caicos PRO

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

0.37 billion

352 mm²

Die Size

67 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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