AMD Radeon R9 390 X2 vs ATI Radeon HD 3870 Mac Edition

VS

AMD Radeon R9 390 X2 ATI Radeon HD 3870 Mac Edition

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 512MB VRAM Radeon HD 3870 Mac Edition 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 7 years and 3 months late

Larger VRAM bandwidth (345.6GB/s vs 72.06GB/s)

2240 additional rendering cores

ATI Radeon HD 3870 Mac Edition 's Advantages

Lower TDP (106W vs 580W)

Score

Benchmark

FP32 (float)

Radeon R9 390 X2 +930%

5.12 TFLOPS

Radeon HD 3870 Mac Edition

0.497 TFLOPS

Radeon R9 390 X2

VS

Radeon HD 3870 Mac Edition

Graphics Card

Sep 2015

Release Date

Jun 2008

Pirate Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1350 MHz

Memory Clock

1126 MHz

Memory

8GB

Memory Size

512MB

GDDR5

Memory Type

GDDR4

512bit

Memory Bus

256bit

345.6GB/s

Bandwidth

72.06GB/s

Render Config

-

SM Count

-

40

Compute Units

4

2560

Shading Units

320

160

TMUs

16

64

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

-

1024 KB

L2 Cache

256 KB

Theoretical Performance

64.00 GPixel/s

Pixel Rate

12.43 GPixel/s

160.0 GTexel/s

Texture Rate

12.43 GTexel/s

-

FP16 (half)

-

5.120 TFLOPS

FP32 (float)

497.3 GFLOPS

640.0 GFLOPS

FP64 (double)

99.46 GFLOPS

Graphics Processor

Grenada

GPU Name

RV670

Grenada PRO (215-0880030)

GPU Variant

RV670 XT (215-0708005)

GCN 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

6.2 billion

Transistors

0.666 billion

438 mm²

Die Size

192 mm²

Board Design

580W

TDP

106W

950 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

4x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (12_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.0

OpenCL

N/A

1.2

Vulkan

N/A

-

CUDA

-

6.3

Shader Model

4.1

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