AMD Radeon HD 8870 OEM vs AMD Radeon RX 455 OEM

VS

AMD Radeon HD 8870 OEM AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870 OEM 's Advantages

Larger VRAM bandwidth (153.6GB/s vs 104.0GB/s)

512 additional rendering cores

AMD Radeon RX 455 OEM 's Advantages

Released 3 years and 5 months late

Lower TDP (100W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 8870 OEM +58%

2.56 TFLOPS

Radeon RX 455 OEM

1.613 TFLOPS

Radeon HD 8870 OEM

VS

Radeon RX 455 OEM

Graphics Card

Jan 2013

Release Date

Jun 2016

Sea Islands

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1200 MHz

Memory Clock

1625 MHz

Memory

2GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

128bit

153.6GB/s

Bandwidth

104.0GB/s

Render Config

-

SM Count

-

20

Compute Units

12

1280

Shading Units

768

80

TMUs

48

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

16.80 GPixel/s

80.00 GTexel/s

Texture Rate

50.40 GTexel/s

-

FP16 (half)

-

2.560 TFLOPS

FP32 (float)

1.613 TFLOPS

160.0 GFLOPS

FP64 (double)

100.8 GFLOPS

Graphics Processor

Pitcairn

GPU Name

Tobago

Pitcairn XT (215-0828047)

GPU Variant

Tobago PRO (215-0875010)

GCN 1.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.8 billion

Transistors

2.08 billion

212 mm²

Die Size

160 mm²

Board Design

175W

TDP

100W

450 W

Suggested PSU

300 W

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

Outputs

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

2x 6-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.3

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