AMD Radeon R9 390X vs AMD Radeon R9 270 1024SP

VS

AMD Radeon R9 390X

AMD Radeon R9 270 1024SP

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390X and 2GB VRAM Radeon R9 270 1024SP 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 153.6GB/s)

1792 additional rendering cores

AMD Radeon R9 270 1024SP 's Advantages

Boost Clock925MHz

Lower TDP (150W vs 275W)

Score

Benchmark

FP32 (float)

Radeon R9 390X +212%

5.914 TFLOPS

Radeon R9 270 1024SP

1.894 TFLOPS

Radeon R9 390X

VS

Radeon R9 270 1024SP

Graphics Card

Jun 2015

Release Date

Mar 2015

Pirate Islands

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

900 MHz

-

Boost Clock

925 MHz

1500 MHz

Memory Clock

1200 MHz

Memory

8GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

512bit

Memory Bus

256bit

384.0GB/s

Bandwidth

153.6GB/s

Render Config

44

Compute Units

16

-

2816

Shading Units

1024

176

TMUs

64

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

67.20 GPixel/s

Pixel Rate

29.60 GPixel/s

184.8 GTexel/s

Texture Rate

59.20 GTexel/s

-

5.914 TFLOPS

FP32 (float)

1.894 TFLOPS

739.2 GFLOPS

FP64 (double)

118.4 GFLOPS

Board Design

275W

TDP

150W

600 W

Suggested PSU

450 W

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

Outputs

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

1x 6-pin + 1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Grenada

GPU Name

Pitcairn

Grenada XT (215-0880004)

GPU Variant

Pitcairn PRO (215-0828062)

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

6.2 billion

Transistors

2.8 billion

438 mm²

Die Size

212 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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