ATI Radeon HD 4870 X2 vs AMD Radeon RX 6600

VS

ATI Radeon HD 4870 X2

AMD Radeon RX 6600

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4870 X2 and 8GB VRAM Radeon RX 6600 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Released 13 years and 2 months late

Boost Clock2491MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (224.0GB/s vs 115.2GB/s)

992 additional rendering cores

Lower TDP (132W vs 286W)

Score

Benchmark

FP32 (float)

Radeon HD 4870 X2

1.2 TFLOPS

Radeon RX 6600 +644%

8.928 TFLOPS

Radeon HD 4870 X2

VS

Radeon RX 6600

Graphics Card

Aug 2008

Release Date

Oct 2021

Radeon R700

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

1626 MHz

-

Boost Clock

2491 MHz

900 MHz

Memory Clock

1750 MHz

Memory

1024MB

Memory Size

8GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

128bit

115.2GB/s

Bandwidth

224.0GB/s

Render Config

10

Compute Units

28

-

800

Shading Units

1792

40

TMUs

112

16

ROPs

64

-

RT Cores

28

16 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

2 MB

-

L3 Cache

32 MB

Theoretical Performance

12.00 GPixel/s

Pixel Rate

159.4 GPixel/s

30.00 GTexel/s

Texture Rate

279.0 GTexel/s

-

FP16 (half)

17.86 TFLOPS

1200 GFLOPS

FP32 (float)

8.928 TFLOPS

240.0 GFLOPS

FP64 (double)

558.0 GFLOPS

Board Design

286W

TDP

132W

600 W

Suggested PSU

300 W

2x DVI 1x S-Video

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

1x 6-pin + 1x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

R700

GPU Name

Navi 23

R700 XT (215-0669045)

GPU Variant

Navi 23 XL (215-130000016)

TeraScale

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

7 nm

0.956 billion

Transistors

11.06 billion

256 mm²

Die Size

237 mm²

Graphics Features

10.1 (10_1)

DirectX

12 Ultimate (12_2)

3.3

OpenGL

4.6

1.1

OpenCL

2.1

N/A

Vulkan

1.3

-

4.1

Shader Model

6.5

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