AMD Radeon Sky 700 vs AMD Radeon HD 6870 1600SP Edition

VS

AMD Radeon Sky 700

AMD Radeon HD 6870 1600SP Edition

We compared two Desktop platform GPUs: 6GB VRAM Radeon Sky 700 and 1024MB VRAM Radeon HD 6870 1600SP Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 700 's Advantages

More VRAM (6GB vs 1024GB)

Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)

192 additional rendering cores

AMD Radeon HD 6870 1600SP Edition 's Advantages

Lower TDP (175W vs 225W)

Score

Benchmark

FP32 (float)

Radeon Sky 700 +18%

3.226 TFLOPS

Radeon HD 6870 1600SP Edition

2.72 TFLOPS

Radeon Sky 700

VS

Radeon HD 6870 1600SP Edition

Graphics Card

Mar 2013

Release Date

Jan 2013

Radeon Sky

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

1050 MHz

Memory

6GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

264.0GB/s

Bandwidth

134.4GB/s

Render Config

28

Compute Units

20

-

1792

Shading Units

1600

112

TMUs

80

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

28.80 GPixel/s

Pixel Rate

27.20 GPixel/s

100.8 GTexel/s

Texture Rate

68.00 GTexel/s

-

3.226 TFLOPS

FP32 (float)

2.720 TFLOPS

806.4 GFLOPS

FP64 (double)

544.0 GFLOPS

Board Design

225W

TDP

175W

550 W

Suggested PSU

450 W

1x DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Tahiti

GPU Name

Cypress

Tahiti PRO GL

GPU Variant

Cypress XT (215-0735033)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

2.154 billion

352 mm²

Die Size

334 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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