AMD Radeon R9 390 vs AMD Radeon HD 6990

VS

AMD Radeon R9 390

AMD Radeon HD 6990

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 2GB VRAM Radeon HD 6990 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 3 months late

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 160.0GB/s)

1024 additional rendering cores

Lower TDP (275W vs 375W)

Score

Benchmark

FP32 (float)

Radeon R9 390 +100%

5.12 TFLOPS

Radeon HD 6990

2.55 TFLOPS

Radeon R9 390

VS

Radeon HD 6990

Graphics Card

Jun 2015

Release Date

Mar 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

1250 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

160.0GB/s

Render Config

40

Compute Units

24

-

2560

Shading Units

1536

160

TMUs

96

64

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

64.00 GPixel/s

Pixel Rate

26.56 GPixel/s

160.0 GTexel/s

Texture Rate

79.68 GTexel/s

-

5.120 TFLOPS

FP32 (float)

2.550 TFLOPS

640.0 GFLOPS

FP64 (double)

637.4 GFLOPS

Board Design

275W

TDP

375W

600 W

Suggested PSU

750 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Grenada

GPU Name

Antilles

Grenada PRO (215-0880030)

GPU Variant

Antilles XT (215-0807027)

GCN 2.0

Architecture

TeraScale 3

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

6.2 billion

Transistors

2.64 billion

438 mm²

Die Size

389 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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