AMD Radeon R9 390X vs AMD Radeon HD 7950

VS

AMD Radeon R9 390X

AMD Radeon HD 7950

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

Released 3 years and 5 months late

More VRAM (8GB vs 3GB)

Larger VRAM bandwidth (384.0GB/s vs 240.0GB/s)

1024 additional rendering cores

AMD Radeon HD 7950 's Advantages

Lower TDP (200W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +106%

5.914 TFLOPS

Radeon HD 7950

2.867 TFLOPS

3DMark Time Spy

Radeon R9 390X +121%

4245

Radeon HD 7950

1917

Radeon R9 390X

VS

Radeon HD 7950

Graphics Card

Jun 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

-

1500 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

384bit

384.0GB/s

Bandwidth

240.0GB/s

Render Config

44

Compute Units

28

-

2816

Shading Units

1792

176

TMUs

112

64

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

768 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

25.60 GPixel/s

184.8 GTexel/s

Texture Rate

89.60 GTexel/s

-

5.914 TFLOPS

FP32 (float)

2.867 TFLOPS

739.2 GFLOPS

FP64 (double)

716.8 GFLOPS

Board Design

275W

TDP

200W

600 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

1x 6-pin + 1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Grenada

GPU Name

Tahiti

Grenada XT (215-0880004)

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

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.0

OpenCL

1.2

Vulkan

1.2

-

6.3

Shader Model

5.1

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