AMD Radeon Sky 700 vs AMD Radeon HD 6870 X2

VS

AMD Radeon Sky 700

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 6GB VRAM Radeon Sky 700 and 1024MB VRAM Radeon HD 6870 X2 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 and 8 months late

More VRAM (6GB vs 1024GB)

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

672 additional rendering cores

Lower TDP (225W vs 300W)

Score

Benchmark

FP32 (float)

Radeon Sky 700 +60%

3.226 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon Sky 700

VS

Radeon HD 6870 X2

Graphics Card

Mar 2013

Release Date

Jul 2011

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

14

-

1792

Shading Units

1120

112

TMUs

56

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

28.80 GPixel/s

100.8 GTexel/s

Texture Rate

50.40 GTexel/s

-

3.226 TFLOPS

FP32 (float)

2.016 TFLOPS

806.4 GFLOPS

FP64 (double)

-

Board Design

225W

TDP

300W

550 W

Suggested PSU

700 W

1x DisplayPort 1.2

Outputs

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

1x 8-pin

Power Connectors

-

Graphics Processor

Tahiti

GPU Name

Barts

Tahiti PRO GL

GPU Variant

Barts XT (215-0798000)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

4.313 billion

Transistors

1.7 billion

352 mm²

Die Size

255 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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