AMD Radeon R9 390 vs AMD Radeon HD 6790

VS

AMD Radeon R9 390

AMD Radeon HD 6790

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 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 R9 390 's Advantages

Released 4 years and 2 months late

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (384.0GB/s vs 134.4GB/s)

1760 additional rendering cores

AMD Radeon HD 6790 's Advantages

Lower TDP (150W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390 +280%

5.12 TFLOPS

Radeon HD 6790

1.344 TFLOPS

Radeon R9 390

VS

Radeon HD 6790

Graphics Card

Jun 2015

Release Date

Apr 2011

Pirate Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1500 MHz

Memory Clock

1050 MHz

Memory

8GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

134.4GB/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

512 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

13.44 GPixel/s

160.0 GTexel/s

Texture Rate

33.60 GTexel/s

-

5.120 TFLOPS

FP32 (float)

1344 GFLOPS

640.0 GFLOPS

FP64 (double)

-

Board Design

275W

TDP

150W

600 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Grenada

GPU Name

Barts

Grenada PRO (215-0880030)

GPU Variant

Barts LE (215-0798002)

GCN 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

6.2 billion

Transistors

1.7 billion

438 mm²

Die Size

255 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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