ATI Radeon HD 3870 Mac Edition vs ATI Radeon HD 4770

VS

ATI Radeon HD 3870 Mac Edition

ATI Radeon HD 4770

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 512MB VRAM Radeon HD 4770 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 51.20GB/s)

ATI Radeon HD 4770 's Advantages

Released 10 months late

320 additional rendering cores

Lower TDP (80W vs 106W)

Score

Benchmark

FP32 (float)

Radeon HD 3870 Mac Edition

0.497 TFLOPS

Radeon HD 4770 +93%

0.96 TFLOPS

Radeon HD 3870 Mac Edition

VS

Radeon HD 4770

Graphics Card

Jun 2008

Release Date

Apr 2009

Radeon R600

Generation

Radeon R700

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

128bit

72.06GB/s

Bandwidth

51.20GB/s

Render Config

4

Compute Units

8

-

320

Shading Units

640

16

TMUs

32

16

ROPs

16

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

12.00 GPixel/s

12.43 GTexel/s

Texture Rate

24.00 GTexel/s

-

497.3 GFLOPS

FP32 (float)

960.0 GFLOPS

99.46 GFLOPS

FP64 (double)

192.0 GFLOPS

Board Design

106W

TDP

80W

300 W

Suggested PSU

250 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

1x 6-pin

Power Connectors

1x 6-pin

Graphics Processor

RV670

GPU Name

RV740

RV670 XT (215-0708005)

GPU Variant

RV740 XT (215-0727019)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.666 billion

Transistors

0.826 billion

192 mm²

Die Size

137 mm²

Graphics Features

10.1 (10_1)

DirectX

10.1 (10_1)

3.3 (full) 4.0 (partial)

OpenGL

3.3

N/A

OpenCL

1.1

N/A

Vulkan

N/A

-

4.1

Shader Model

4.1

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