AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 7970 X2

VS

AMD Radeon HD 7870 GHz Edition

AMD Radeon HD 7970 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 3GB VRAM Radeon HD 7970 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 500W)

AMD Radeon HD 7970 X2 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (264.0GB/s vs 153.6GB/s)

768 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon HD 7970 X2 +48%

3.789 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon HD 7970 X2

Graphics Card

Mar 2012

Release Date

Aug 2012

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

1375 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

153.6GB/s

Bandwidth

264.0GB/s

Render Config

20

Compute Units

32

-

1280

Shading Units

2048

80

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

768 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

29.60 GPixel/s

80.00 GTexel/s

Texture Rate

118.4 GTexel/s

-

2.560 TFLOPS

FP32 (float)

3.789 TFLOPS

160.0 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

175W

TDP

500W

450 W

Suggested PSU

900 W

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

Outputs

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

2x 6-pin

Power Connectors

3x 8-pin

Graphics Processor

Pitcairn

GPU Name

New Zealand

Pitcairn XT (215-0828047)

GPU Variant

-

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

4.313 billion

212 mm²

Die Size

352 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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