AMD Radeon HD 7770 GHz Edition vs AMD Radeon HD 6770 Green Edition

VS

AMD Radeon HD 7770 GHz Edition

AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 7770 GHz Edition and 2GB VRAM Radeon HD 6770 Green Edition 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

Larger VRAM bandwidth (72.00GB/s vs 21.34GB/s)

Lower TDP (80W vs 86W)

AMD Radeon HD 6770 Green Edition 's Advantages

Released 1 years and 2 months late

More VRAM (2GB vs 1024GB)

80 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 7770 GHz Edition +26%

1.28 TFLOPS

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 7770 GHz Edition

VS

Radeon HD 6770 Green Edition

Graphics Card

Feb 2012

Release Date

Apr 2013

Southern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1125 MHz

Memory Clock

667 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR3

128bit

Memory Bus

128bit

72.00GB/s

Bandwidth

21.34GB/s

Render Config

10

Compute Units

9

-

640

Shading Units

720

40

TMUs

36

16

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

16.00 GPixel/s

Pixel Rate

11.20 GPixel/s

40.00 GTexel/s

Texture Rate

25.20 GTexel/s

-

1280 GFLOPS

FP32 (float)

1008 GFLOPS

80.00 GFLOPS

FP64 (double)

-

Board Design

80W

TDP

86W

250 W

Suggested PSU

250 W

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

Outputs

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

1x 6-pin

Power Connectors

-

Graphics Processor

Cape Verde

GPU Name

Juniper

Cape Verde XT

GPU Variant

Juniper LE (215-0754009)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

1.5 billion

Transistors

1.04 billion

123 mm²

Die Size

166 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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