ATI Radeon HD 3870 Mac Edition vs AMD Radeon R9 390

VS

ATI Radeon HD 3870 Mac Edition

AMD Radeon R9 390

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 Mac Edition 's Advantages

Lower TDP (106W vs 275W)

AMD Radeon R9 390 's Advantages

Released 7 years late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 72.06GB/s)

2240 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3870 Mac Edition

0.497 TFLOPS

Radeon R9 390 +930%

5.12 TFLOPS

Radeon HD 3870 Mac Edition

VS

Radeon R9 390

Graphics Card

Jun 2008

Release Date

Jun 2015

Radeon R600

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1126 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

8GB

GDDR4

Memory Type

GDDR5

256bit

Memory Bus

512bit

72.06GB/s

Bandwidth

384.0GB/s

Render Config

4

Compute Units

40

-

320

Shading Units

2560

16

TMUs

160

16

ROPs

64

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

64.00 GPixel/s

12.43 GTexel/s

Texture Rate

160.0 GTexel/s

-

497.3 GFLOPS

FP32 (float)

5.120 TFLOPS

99.46 GFLOPS

FP64 (double)

640.0 GFLOPS

Board Design

106W

TDP

275W

300 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

RV670

GPU Name

Grenada

RV670 XT (215-0708005)

GPU Variant

Grenada PRO (215-0880030)

TeraScale

Architecture

GCN 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

6.2 billion

192 mm²

Die Size

438 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (12_0)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

2.0

N/A

Vulkan

1.2

-

4.1

Shader Model

6.3

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