ATI Radeon HD 4870 Mac Edition vs AMD Radeon R9 390X

VS

ATI Radeon HD 4870 Mac Edition

AMD Radeon R9 390X

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 8GB VRAM Radeon R9 390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 Mac Edition 's Advantages

Lower TDP (150W vs 275W)

AMD Radeon R9 390X 's Advantages

Released 6 years and 5 months late

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 108.8GB/s)

2016 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon R9 390X +392%

5.914 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon R9 390X

Graphics Card

Jan 2009

Release Date

Jun 2015

Radeon R700

Generation

Pirate Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

850 MHz

Memory Clock

1500 MHz

Memory

512MB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

512bit

108.8GB/s

Bandwidth

384.0GB/s

Render Config

10

Compute Units

44

-

800

Shading Units

2816

40

TMUs

176

16

ROPs

64

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

1024 KB

-

Theoretical Performance

12.00 GPixel/s

Pixel Rate

67.20 GPixel/s

30.00 GTexel/s

Texture Rate

184.8 GTexel/s

-

1200 GFLOPS

FP32 (float)

5.914 TFLOPS

240.0 GFLOPS

FP64 (double)

739.2 GFLOPS

Board Design

150W

TDP

275W

450 W

Suggested PSU

600 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

RV770

GPU Name

Grenada

RV770 XT Mac (215-0669080)

GPU Variant

Grenada XT (215-0880004)

TeraScale

Architecture

GCN 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.956 billion

Transistors

6.2 billion

256 mm²

Die Size

438 mm²

Graphics Features

10.1 (10_1)

DirectX

12 (12_0)

3.3

OpenGL

4.6

1.1

OpenCL

2.0

N/A

Vulkan

1.2

-

4.1

Shader Model

6.3

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