ATI Radeon HD 4870 Mac Edition vs ATI Radeon HD 4650

VS

ATI Radeon HD 4870 Mac Edition

ATI Radeon HD 4650

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 256MB VRAM Radeon HD 4650 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

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (108.8GB/s vs 22.40GB/s)

480 additional rendering cores

ATI Radeon HD 4650 's Advantages

Lower TDP (48W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition +212%

1.2 TFLOPS

Radeon HD 4650

0.384 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 4650

Graphics Card

Jan 2009

Release Date

Sep 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

700 MHz

Memory

512MB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

108.8GB/s

Bandwidth

22.40GB/s

Render Config

10

Compute Units

4

-

800

Shading Units

320

40

TMUs

32

16

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

4.800 GPixel/s

30.00 GTexel/s

Texture Rate

19.20 GTexel/s

-

1200 GFLOPS

FP32 (float)

384.0 GFLOPS

240.0 GFLOPS

FP64 (double)

-

Board Design

150W

TDP

48W

450 W

Suggested PSU

200 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

-

Graphics Processor

RV770

GPU Name

RV730

RV770 XT Mac (215-0669080)

GPU Variant

RV730 PRO (215-0719056)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

55 nm

0.956 billion

Transistors

0.514 billion

256 mm²

Die Size

146 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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