ATI Radeon HD 3870 Mac Edition vs ATI Radeon HD 2600 XT Mac Edition

VS

ATI Radeon HD 3870 Mac Edition

ATI Radeon HD 2600 XT Mac Edition

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 256MB VRAM Radeon HD 2600 XT Mac Edition 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

More VRAM (512GB vs 256GB)

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

200 additional rendering cores

ATI Radeon HD 2600 XT Mac Edition 's Advantages

Lower TDP (45W vs 106W)

Score

Benchmark

FP32 (float)

Radeon HD 3870 Mac Edition +195%

0.497 TFLOPS

Radeon HD 2600 XT Mac Edition

0.168 TFLOPS

Radeon HD 3870 Mac Edition

VS

Radeon HD 2600 XT Mac Edition

Graphics Card

Jun 2008

Release Date

Feb 2008

Radeon R600

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1126 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

256MB

GDDR4

Memory Type

GDDR3

256bit

Memory Bus

128bit

72.06GB/s

Bandwidth

25.60GB/s

Render Config

4

Compute Units

3

-

320

Shading Units

120

16

TMUs

8

16

ROPs

4

-

256 KB

L2 Cache

64 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

2.800 GPixel/s

12.43 GTexel/s

Texture Rate

5.600 GTexel/s

-

497.3 GFLOPS

FP32 (float)

168.0 GFLOPS

99.46 GFLOPS

FP64 (double)

-

Board Design

106W

TDP

45W

300 W

Suggested PSU

200 W

2x DVI 1x S-Video

Outputs

2x DVI

1x 6-pin

Power Connectors

None

Graphics Processor

RV670

GPU Name

RV630

RV670 XT (215-0708005)

GPU Variant

-

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

65 nm

0.666 billion

Transistors

0.39 billion

192 mm²

Die Size

153 mm²

Graphics Features

10.1 (10_1)

DirectX

10.0 (10_0)

3.3 (full) 4.0 (partial)

OpenGL

3.3

N/A

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.0

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