ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6970

VS

ATI Radeon HD 4870 Mac Edition

AMD Radeon HD 6970

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 2GB VRAM Radeon HD 6970 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 250W)

AMD Radeon HD 6970 's Advantages

Released 1 years and 11 months late

More VRAM (2GB vs 512GB)

Larger VRAM bandwidth (176.0GB/s vs 108.8GB/s)

736 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon HD 6970 +125%

2.703 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon HD 6970

Graphics Card

Jan 2009

Release Date

Dec 2010

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

850 MHz

Memory Clock

1375 MHz

Memory

512MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

108.8GB/s

Bandwidth

176.0GB/s

Render Config

10

Compute Units

24

-

800

Shading Units

1536

40

TMUs

96

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

28.16 GPixel/s

30.00 GTexel/s

Texture Rate

84.48 GTexel/s

-

1200 GFLOPS

FP32 (float)

2.703 TFLOPS

240.0 GFLOPS

FP64 (double)

675.8 GFLOPS

Board Design

150W

TDP

250W

450 W

Suggested PSU

600 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

RV770

GPU Name

Cayman

RV770 XT Mac (215-0669080)

GPU Variant

Cayman XT (215-0807007)

TeraScale

Architecture

TeraScale 3

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.956 billion

Transistors

2.64 billion

256 mm²

Die Size

389 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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