AMD Radeon Sky 900 vs AMD Radeon HD 6850 X2

VS

AMD Radeon Sky 900

AMD Radeon HD 6850 X2

We compared two Desktop platform GPUs: 3GB VRAM Radeon Sky 900 and 2GB VRAM Radeon HD 6850 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Sky 900 's Advantages

Released 1 years and 6 months late

Boost Clock950MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)

832 additional rendering cores

AMD Radeon HD 6850 X2 's Advantages

Lower TDP (254W vs 300W)

Score

Benchmark

FP32 (float)

Radeon Sky 900 +121%

3.405 TFLOPS

Radeon HD 6850 X2

1.536 TFLOPS

Radeon Sky 900

VS

Radeon HD 6850 X2

Graphics Card

Mar 2013

Release Date

Sep 2011

Radeon Sky

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

825 MHz

Base Clock

-

950 MHz

Boost Clock

-

1250 MHz

Memory Clock

1050 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

256bit

240.0GB/s

Bandwidth

134.4GB/s

Render Config

28

Compute Units

12

-

1792

Shading Units

960

112

TMUs

48

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

768 KB

L2 Cache

512 KB

-

Theoretical Performance

30.40 GPixel/s

Pixel Rate

25.60 GPixel/s

106.4 GTexel/s

Texture Rate

38.40 GTexel/s

-

3.405 TFLOPS

FP32 (float)

1.536 TFLOPS

851.2 GFLOPS

FP64 (double)

-

Board Design

300W

TDP

254W

700 W

Suggested PSU

600 W

1x DVI 1x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Tahiti

GPU Name

Barts

Orthrus

GPU Variant

Barts PRO (215-0798006)

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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