ATI Radeon HD 4870 Mac Edition vs ATI Radeon HD 3850 X2

VS

ATI Radeon HD 4870 Mac Edition

ATI Radeon HD 3850 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 512MB VRAM Radeon HD 3850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 Mac Edition 's Advantages

Released 9 months late

Larger VRAM bandwidth (108.8GB/s vs 52.99GB/s)

480 additional rendering cores

ATI Radeon HD 3850 X2 's Advantages

Lower TDP (140W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition +180%

1.2 TFLOPS

Radeon HD 3850 X2

0.428 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 3850 X2

Graphics Card

Jan 2009

Release Date

Apr 2008

Radeon R700

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

828 MHz

Memory

512MB

Memory Size

512MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

108.8GB/s

Bandwidth

52.99GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

16

ROPs

16

-

16 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

10.70 GPixel/s

30.00 GTexel/s

Texture Rate

10.70 GTexel/s

-

1200 GFLOPS

FP32 (float)

428.2 GFLOPS

240.0 GFLOPS

FP64 (double)

85.63 GFLOPS

Board Design

150W

TDP

140W

450 W

Suggested PSU

300 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

-

Graphics Processor

RV770

GPU Name

RV670

RV770 XT Mac (215-0669080)

GPU Variant

RV670 PRO (215-0708003)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.956 billion

Transistors

0.666 billion

256 mm²

Die Size

192 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3 (full) 4.0 (partial)

1.1

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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