AMD Radeon R9 390X vs AMD Radeon R7 340 OEM

VS

AMD Radeon R9 390X

AMD Radeon R7 340 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 2GB VRAM Radeon R7 340 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390X 's Advantages

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (384.0GB/s vs 64.00GB/s)

2432 additional rendering cores

AMD Radeon R7 340 OEM 's Advantages

Boost Clock780MHz

Lower TDP (50W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +887%

5.914 TFLOPS

Radeon R7 340 OEM

0.599 TFLOPS

Radeon R9 390X

VS

Radeon R7 340 OEM

Graphics Card

Jun 2015

Release Date

May 2015

Pirate Islands

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

730 MHz

-

Boost Clock

780 MHz

1500 MHz

Memory Clock

1000 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

128bit

384.0GB/s

Bandwidth

64.00GB/s

Render Config

44

Compute Units

6

-

2816

Shading Units

384

176

TMUs

24

64

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

256 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

6.240 GPixel/s

184.8 GTexel/s

Texture Rate

18.72 GTexel/s

-

5.914 TFLOPS

FP32 (float)

599.0 GFLOPS

739.2 GFLOPS

FP64 (double)

37.44 GFLOPS

Board Design

275W

TDP

50W

600 W

Suggested PSU

250 W

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

Outputs

1x DVI 1x HDMI 1.4a 1x VGA

1x 6-pin + 1x 8-pin

Power Connectors

None

Graphics Processor

Grenada

GPU Name

Oland

Grenada XT (215-0880004)

GPU Variant

-

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

0.95 billion

438 mm²

Die Size

77 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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