AMD Radeon HD 7770 GHz Edition vs AMD Radeon Sky 900

VS

AMD Radeon HD 7770 GHz Edition

AMD Radeon Sky 900

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 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 7770 GHz Edition 's Advantages

Lower TDP (80W vs 300W)

AMD Radeon Sky 900 's Advantages

Released 1 years and 1 months late

Boost Clock950MHz

More VRAM (3GB vs 1024GB)

Larger VRAM bandwidth (240.0GB/s vs 72.00GB/s)

1152 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition

1.28 TFLOPS

Radeon Sky 900 +166%

3.405 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon Sky 900

Graphics Card

Feb 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

1125 MHz

Memory Clock

1250 MHz

Memory

1024MB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

384bit

72.00GB/s

Bandwidth

240.0GB/s

Render Config

10

Compute Units

28

-

640

Shading Units

1792

40

TMUs

112

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

-

Theoretical Performance

16.00 GPixel/s

Pixel Rate

30.40 GPixel/s

40.00 GTexel/s

Texture Rate

106.4 GTexel/s

-

1280 GFLOPS

FP32 (float)

3.405 TFLOPS

80.00 GFLOPS

FP64 (double)

851.2 GFLOPS

Board Design

80W

TDP

300W

250 W

Suggested PSU

700 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.2

1x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Cape Verde

GPU Name

Tahiti

Cape Verde XT

GPU Variant

Orthrus

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

1.5 billion

Transistors

4.313 billion

123 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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