ATI Radeon HD 3870 Mac Edition vs AMD Radeon HD 6450

VS

ATI Radeon HD 3870 Mac Edition

AMD Radeon HD 6450

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 512MB VRAM Radeon HD 6450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 Mac Edition 's Advantages

Larger VRAM bandwidth (72.06GB/s vs 25.60GB/s)

160 additional rendering cores

AMD Radeon HD 6450 's Advantages

Released 2 years and 10 months late

Lower TDP (18W vs 106W)

Score

Benchmark

FP32 (float)

Radeon HD 3870 Mac Edition +148%

0.497 TFLOPS

Radeon HD 6450

0.2 TFLOPS

Radeon HD 3870 Mac Edition

VS

Radeon HD 6450

Graphics Card

Jun 2008

Release Date

Apr 2011

Radeon R600

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1126 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

512MB

GDDR4

Memory Type

GDDR5

256bit

Memory Bus

64bit

72.06GB/s

Bandwidth

25.60GB/s

Render Config

4

Compute Units

2

-

320

Shading Units

160

16

TMUs

8

16

ROPs

4

-

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

2.500 GPixel/s

12.43 GTexel/s

Texture Rate

5.000 GTexel/s

-

497.3 GFLOPS

FP32 (float)

200.0 GFLOPS

99.46 GFLOPS

FP64 (double)

-

Board Design

106W

TDP

18W

300 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 6-pin

Power Connectors

None

Graphics Processor

RV670

GPU Name

Caicos

RV670 XT (215-0708005)

GPU Variant

Caicos PRO

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

0.37 billion

192 mm²

Die Size

67 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3 (full) 4.0 (partial)

OpenGL

4.4

N/A

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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