AMD Radeon HD 7970 X2 vs ATI Radeon HD 4870 Mac Edition

VS

AMD Radeon HD 7970 X2

ATI Radeon HD 4870 Mac Edition

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 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 7970 X2 's Advantages

Released 3 years and 7 months late

More VRAM (3GB vs 512GB)

Larger VRAM bandwidth (264.0GB/s vs 108.8GB/s)

1248 additional rendering cores

ATI Radeon HD 4870 Mac Edition 's Advantages

Lower TDP (150W vs 500W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 X2 +215%

3.789 TFLOPS

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon HD 7970 X2

VS

Radeon HD 4870 Mac Edition

Graphics Card

Aug 2012

Release Date

Jan 2009

Southern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

850 MHz

Memory

3GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

108.8GB/s

Render Config

32

Compute Units

10

-

2048

Shading Units

800

128

TMUs

40

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

12.00 GPixel/s

118.4 GTexel/s

Texture Rate

30.00 GTexel/s

-

3.789 TFLOPS

FP32 (float)

1200 GFLOPS

947.2 GFLOPS

FP64 (double)

240.0 GFLOPS

Board Design

500W

TDP

150W

900 W

Suggested PSU

450 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.0

3x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

New Zealand

GPU Name

RV770

-

GPU Variant

RV770 XT Mac (215-0669080)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.956 billion

352 mm²

Die Size

256 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

1.1

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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