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

VS

ATI Radeon HD 4870 Mac Edition

ATI Radeon HD 4870 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1024MB VRAM Radeon HD 4870 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

Lower TDP (150W vs 286W)

ATI Radeon HD 4870 X2 's Advantages

More VRAM (1024GB vs 512GB)

Larger VRAM bandwidth (115.2GB/s vs 108.8GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon HD 4870 X2

1.2 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 4870 X2

Graphics Card

Jan 2009

Release Date

Aug 2008

Radeon R700

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

900 MHz

Memory

512MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

108.8GB/s

Bandwidth

115.2GB/s

Render Config

10

Compute Units

10

-

800

Shading Units

800

40

TMUs

40

16

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

12.00 GPixel/s

30.00 GTexel/s

Texture Rate

30.00 GTexel/s

-

1200 GFLOPS

FP32 (float)

1200 GFLOPS

240.0 GFLOPS

FP64 (double)

240.0 GFLOPS

Board Design

150W

TDP

286W

450 W

Suggested PSU

600 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

RV770

GPU Name

R700

RV770 XT Mac (215-0669080)

GPU Variant

R700 XT (215-0669045)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.956 billion

Transistors

0.956 billion

256 mm²

Die Size

256 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3

OpenGL

3.3

1.1

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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