AMD Radeon HD 6790 vs AMD Radeon HD 6770 Green Edition

VS

AMD Radeon HD 6790

AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 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 6790 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 21.34GB/s)

80 additional rendering cores

AMD Radeon HD 6770 Green Edition 's Advantages

Released 2 years late

More VRAM (2GB vs 1024GB)

Lower TDP (86W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 6790 +33%

1.344 TFLOPS

Radeon HD 6770 Green Edition

1.008 TFLOPS

Radeon HD 6790

VS

Radeon HD 6770 Green Edition

Graphics Card

Apr 2011

Release Date

Apr 2013

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

667 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

128bit

134.4GB/s

Bandwidth

21.34GB/s

Render Config

10

Compute Units

9

-

800

Shading Units

720

40

TMUs

36

16

ROPs

16

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

11.20 GPixel/s

33.60 GTexel/s

Texture Rate

25.20 GTexel/s

-

1344 GFLOPS

FP32 (float)

1008 GFLOPS

-

Board Design

150W

TDP

86W

450 W

Suggested PSU

250 W

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

Outputs

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

2x 6-pin

Power Connectors

-

Graphics Processor

Barts

GPU Name

Juniper

Barts LE (215-0798002)

GPU Variant

Juniper LE (215-0754009)

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.7 billion

Transistors

1.04 billion

255 mm²

Die Size

166 mm²

Graphics Features

11.2 (11_0)

DirectX

11.2 (11_0)

4.4

OpenGL

4.4

1.2

OpenCL

1.2

N/A

Vulkan

N/A

-

5.0

Shader Model

5.0

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