AMD Radeon Sky 700 vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon Sky 700

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 6GB VRAM Radeon Sky 700 and 2GB VRAM Radeon HD 7870 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 700 's Advantages

Released 1 years late

More VRAM (6GB vs 2GB)

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

512 additional rendering cores

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 225W)

Score

Benchmark

FP32 (float)

Radeon Sky 700 +26%

3.226 TFLOPS

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon Sky 700

VS

Radeon HD 7870 GHz Edition

Graphics Card

Mar 2013

Release Date

Mar 2012

Radeon Sky

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1200 MHz

Memory

6GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

153.6GB/s

Render Config

28

Compute Units

20

-

1792

Shading Units

1280

112

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

32.00 GPixel/s

100.8 GTexel/s

Texture Rate

80.00 GTexel/s

-

3.226 TFLOPS

FP32 (float)

2.560 TFLOPS

806.4 GFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

225W

TDP

175W

550 W

Suggested PSU

450 W

1x DisplayPort 1.2

Outputs

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

1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Tahiti

GPU Name

Pitcairn

Tahiti PRO GL

GPU Variant

Pitcairn XT (215-0828047)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.8 billion

352 mm²

Die Size

212 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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