AMD Radeon HD 6770 Green Edition vs ATI Radeon HD 4870 Mac Edition

VS

AMD Radeon HD 6770 Green Edition ATI Radeon HD 4870 Mac Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6770 Green Edition and 512MB VRAM Radeon HD 4870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770 Green Edition 's Advantages

Released 4 years and 3 months late

Lower TDP (86W vs 150W)

ATI Radeon HD 4870 Mac Edition 's Advantages

Larger VRAM bandwidth (108.8GB/s vs 21.34GB/s)

80 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 4870 Mac Edition +19%

1.2 TFLOPS

Radeon HD 6770 Green Edition

VS

Radeon HD 4870 Mac Edition

Graphics Card

Apr 2013

Release Date

Jan 2009

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

667 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

GDDR3

Memory Type

GDDR5

128bit

Memory Bus

256bit

21.34GB/s

Bandwidth

108.8GB/s

Render Config

-

SM Count

-

9

Compute Units

10

720

Shading Units

800

36

TMUs

40

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

11.20 GPixel/s

Pixel Rate

12.00 GPixel/s

25.20 GTexel/s

Texture Rate

30.00 GTexel/s

-

FP16 (half)

-

1008 GFLOPS

FP32 (float)

1200 GFLOPS

-

FP64 (double)

240.0 GFLOPS

Graphics Processor

Juniper

GPU Name

RV770

Juniper LE (215-0754009)

GPU Variant

RV770 XT Mac (215-0669080)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.04 billion

Transistors

0.956 billion

166 mm²

Die Size

256 mm²

Board Design

86W

TDP

150W

250 W

Suggested PSU

450 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

1x DVI 1x mini-DisplayPort 1.0

-

Power Connectors

2x 6-pin

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

CUDA

-

5.0

Shader Model

4.1

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