AMD Radeon RX 6600 vs AMD Radeon HD 8870 OEM

VS

AMD Radeon RX 6600 AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Released 8 years and 9 months late

Boost Clock2491MHz

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (224.0GB/s vs 153.6GB/s)

512 additional rendering cores

Lower TDP (132W vs 175W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 +248%

8.928 TFLOPS

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 6600

VS

Radeon HD 8870 OEM

Graphics Card

Oct 2021

Release Date

Jan 2013

Navi II

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1626 MHz

Base Clock

-

2491 MHz

Boost Clock

-

1750 MHz

Memory Clock

1200 MHz

Memory

8GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

256bit

224.0GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

28

Compute Units

20

1792

Shading Units

1280

112

TMUs

80

64

ROPs

32

-

Tensor Cores

-

28

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

512 KB

Theoretical Performance

159.4 GPixel/s

Pixel Rate

32.00 GPixel/s

279.0 GTexel/s

Texture Rate

80.00 GTexel/s

17.86 TFLOPS

FP16 (half)

-

8.928 TFLOPS

FP32 (float)

2.560 TFLOPS

558.0 GFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Navi 23

GPU Name

Pitcairn

Navi 23 XL (215-130000016)

GPU Variant

Pitcairn XT (215-0828047)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

11.06 billion

Transistors

2.8 billion

237 mm²

Die Size

212 mm²

Board Design

132W

TDP

175W

300 W

Suggested PSU

450 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 8-pin

Power Connectors

2x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

1.3

Vulkan

1.2

-

CUDA

-

6.5

Shader Model

5.1

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