AMD Radeon HD 7870 GHz Edition vs AMD Radeon Sky 900

VS

AMD Radeon HD 7870 GHz Edition

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 3GB VRAM Radeon Sky 900 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 300W)

AMD Radeon Sky 900 's Advantages

Released 1 years late

Boost Clock950MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 153.6GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon Sky 900 +33%

3.405 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon Sky 900

Graphics Card

Mar 2012

Release Date

Mar 2013

Southern Islands

Generation

Radeon Sky

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

825 MHz

-

Boost Clock

950 MHz

1200 MHz

Memory Clock

1250 MHz

Memory

2GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

384bit

153.6GB/s

Bandwidth

240.0GB/s

Render Config

20

Compute Units

28

-

1280

Shading Units

1792

80

TMUs

112

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

30.40 GPixel/s

80.00 GTexel/s

Texture Rate

106.4 GTexel/s

-

2.560 TFLOPS

FP32 (float)

3.405 TFLOPS

160.0 GFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

175W

TDP

300W

450 W

Suggested PSU

700 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.2

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Pitcairn

GPU Name

Tahiti

Pitcairn XT (215-0828047)

GPU Variant

Orthrus

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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