AMD Radeon HD 6770 vs AMD Radeon HD 6790

VS

AMD Radeon HD 6770

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6770 and 1024MB VRAM Radeon HD 6790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6770 's Advantages

Lower TDP (108W vs 150W)

AMD Radeon HD 6790 's Advantages

Larger VRAM bandwidth (134.4GB/s vs 76.80GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 6770 +1%

1.36 TFLOPS

Radeon HD 6790

1.344 TFLOPS

Radeon HD 6770

VS

Radeon HD 6790

Graphics Card

Jan 2011

Release Date

Apr 2011

Northern Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

1050 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

76.80GB/s

Bandwidth

134.4GB/s

Render Config

10

Compute Units

10

-

800

Shading Units

800

40

TMUs

40

16

ROPs

16

-

8 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

13.60 GPixel/s

Pixel Rate

13.44 GPixel/s

34.00 GTexel/s

Texture Rate

33.60 GTexel/s

-

1360 GFLOPS

FP32 (float)

1344 GFLOPS

-

Board Design

108W

TDP

150W

300 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

Juniper

GPU Name

Barts

Juniper XT (215-0754013)

GPU Variant

Barts LE (215-0798002)

TeraScale 2

Architecture

TeraScale 2

TSMC

Foundry

TSMC

40 nm

Process Size

40 nm

1.04 billion

Transistors

1.7 billion

166 mm²

Die Size

255 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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