AMD Radeon R9 390 X2 vs AMD Radeon HD 6770

VS

AMD Radeon R9 390 X2

AMD Radeon HD 6770

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 1024MB VRAM Radeon HD 6770 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390 X2 's Advantages

Released 4 years and 8 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (345.6GB/s vs 76.80GB/s)

1760 additional rendering cores

AMD Radeon HD 6770 's Advantages

Lower TDP (108W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2 +276%

5.12 TFLOPS

Radeon HD 6770

1.36 TFLOPS

Radeon R9 390 X2

VS

Radeon HD 6770

Graphics Card

Sep 2015

Release Date

Jan 2011

Pirate Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1350 MHz

Memory Clock

1200 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

128bit

345.6GB/s

Bandwidth

76.80GB/s

Render Config

40

Compute Units

10

-

2560

Shading Units

800

160

TMUs

40

64

ROPs

16

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

13.60 GPixel/s

160.0 GTexel/s

Texture Rate

34.00 GTexel/s

-

5.120 TFLOPS

FP32 (float)

1360 GFLOPS

640.0 GFLOPS

FP64 (double)

-

Board Design

580W

TDP

108W

950 W

Suggested PSU

300 W

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

Outputs

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

4x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Grenada

GPU Name

Juniper

Grenada PRO (215-0880030)

GPU Variant

Juniper XT (215-0754013)

GCN 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

6.2 billion

Transistors

1.04 billion

438 mm²

Die Size

166 mm²

Graphics Features

12 (12_0)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.0

OpenCL

1.2

Vulkan

N/A

-

6.3

Shader Model

5.0

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