AMD Radeon R9 390 X2 vs AMD Radeon HD 7950

VS

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 3GB VRAM Radeon HD 7950 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 3 years and 8 months late

More VRAM (8GB vs 3GB)

Larger VRAM bandwidth (345.6GB/s vs 240.0GB/s)

768 additional rendering cores

AMD Radeon HD 7950 's Advantages

Lower TDP (200W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2 +78%

5.12 TFLOPS

Radeon HD 7950

2.867 TFLOPS

Radeon R9 390 X2

VS

Radeon HD 7950

Graphics Card

Sep 2015

Release Date

Jan 2012

Pirate Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1350 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

384bit

345.6GB/s

Bandwidth

240.0GB/s

Render Config

-

SM Count

-

40

Compute Units

28

2560

Shading Units

1792

160

TMUs

112

64

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

768 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

25.60 GPixel/s

160.0 GTexel/s

Texture Rate

89.60 GTexel/s

-

FP16 (half)

-

5.120 TFLOPS

FP32 (float)

2.867 TFLOPS

640.0 GFLOPS

FP64 (double)

716.8 GFLOPS

Graphics Processor

Grenada

GPU Name

Tahiti

Grenada PRO (215-0880030)

GPU Variant

Tahiti PRO (215-0821056)

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

4.313 billion

438 mm²

Die Size

352 mm²

Board Design

580W

TDP

200W

950 W

Suggested PSU

550 W

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

Outputs

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

4x 8-pin

Power Connectors

2x 6-pin

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.0

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

6.3

Shader Model

5.1

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