Radeon R9 390 X2 and Radeon HD 7990 - video card comparison

Radeon R9 390 X2

Radeon HD 7990

Architecture

GCN 2.0 (2013−2017)

GCN 1.0 (2012−2020)

GPU code name

Grenada

Malta

Market segment

Desktop

Release date

September 2015

April 2013

Interface

PCIe 3.0 x16

Supplementary power connectors

4x 8-pin

2x 8-pin

Boost clock speed

1000 MHz

Core clock speed

1000 MHz

950 MHz

Floating-point performance

2x 5,120 gflops

2x 4,096 gflops

Manufacturing process technology

28 nm

Number of transistors

6,200 million

4,313 million

Pipelines / CUDA cores

2560

2048

Power consumption (TDP)

580 Watt

375 Watt

Texture fill rate

160.0

128.0

Memory type

GDDR5

Maximum RAM amount

8 GB

3 GB

Memory bus width

512 Bit

384 Bit

Memory clock speed

5400 MHz

6000 MHz

Memory bandwidth

345.6 GB/s

288.0 GB/s

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

1x DVI, 4x mini-DisplayPort

HDMI

DirectX

12 (12_0)

12 (11_1)

OpenCL

2.0

1.2

OpenGL

4.6

Shader Model

6.3

5.1

Vulkan

1.2.131