AMD Radeon HD 6390 vs AMD Radeon HD 6450

VS

AMD Radeon HD 6390

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 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 HD 6390 's Advantages

More VRAM (1024GB vs 512GB)

160 additional rendering cores

AMD Radeon HD 6450 's Advantages

Larger VRAM bandwidth (25.60GB/s vs 16.00GB/s)

Lower TDP (18W vs 39W)

Score

Benchmark

FP32 (float)

Radeon HD 6390 +76%

0.352 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon HD 6390

VS

Radeon HD 6450

Graphics Card

Jul 2011

Release Date

Apr 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

500 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

512MB

DDR2

Memory Type

GDDR5

128bit

Memory Bus

64bit

16.00GB/s

Bandwidth

25.60GB/s

Render Config

4

Compute Units

2

-

320

Shading Units

160

16

TMUs

8

ROPs

4

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

2.500 GPixel/s

8.800 GTexel/s

Texture Rate

5.000 GTexel/s

-

352.0 GFLOPS

FP32 (float)

200.0 GFLOPS

-

Board Design

39W

TDP

18W

200 W

Suggested PSU

200 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

None

Power Connectors

None

Graphics Processor

Redwood

GPU Name

Caicos

Redwood LE

GPU Variant

Caicos PRO

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

0.627 billion

Transistors

0.37 billion

104 mm²

Die Size

67 mm²

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

5.0

Shader Model

5.0

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