AMD Radeon RX 455 OEM vs ATI Radeon HD 4870 Mac Edition

VS

AMD Radeon RX 455 OEM ATI Radeon HD 4870 Mac Edition

We compared two Desktop platform GPUs: 2GB VRAM Radeon RX 455 OEM and 512MB VRAM Radeon HD 4870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 455 OEM 's Advantages

Released 7 years and 5 months late

Lower TDP (100W vs 150W)

ATI Radeon HD 4870 Mac Edition 's Advantages

Larger VRAM bandwidth (108.8GB/s vs 104.0GB/s)

32 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 455 OEM +34%

1.613 TFLOPS

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon RX 455 OEM

VS

Radeon HD 4870 Mac Edition

Graphics Card

Jun 2016

Release Date

Jan 2009

Arctic Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1625 MHz

Memory Clock

850 MHz

Memory

2GB

Memory Size

512MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

104.0GB/s

Bandwidth

108.8GB/s

Render Config

-

SM Count

-

12

Compute Units

10

768

Shading Units

800

48

TMUs

40

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

Theoretical Performance

16.80 GPixel/s

Pixel Rate

12.00 GPixel/s

50.40 GTexel/s

Texture Rate

30.00 GTexel/s

-

FP16 (half)

-

1.613 TFLOPS

FP32 (float)

1200 GFLOPS

100.8 GFLOPS

FP64 (double)

240.0 GFLOPS

Graphics Processor

Tobago

GPU Name

RV770

Tobago PRO (215-0875010)

GPU Variant

RV770 XT Mac (215-0669080)

GCN 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

2.08 billion

Transistors

0.956 billion

160 mm²

Die Size

256 mm²

Board Design

100W

TDP

150W

300 W

Suggested PSU

450 W

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

Outputs

1x DVI 1x mini-DisplayPort 1.0

1x 6-pin

Power Connectors

2x 6-pin

Graphics Features

12 (12_0)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.0

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

-

6.3

Shader Model

4.1

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