ATI Radeon HD 4870 Mac Edition vs AMD Radeon RX 6900 XT

VS

ATI Radeon HD 4870 Mac Edition

AMD Radeon RX 6900 XT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 16GB VRAM Radeon RX 6900 XT 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 300W)

AMD Radeon RX 6900 XT 's Advantages

Released 11 years and 9 months late

Boost Clock2250MHz

More VRAM (16GB vs 512GB)

Larger VRAM bandwidth (512.0GB/s vs 108.8GB/s)

4320 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 4870 Mac Edition

1.2 TFLOPS

Radeon RX 6900 XT +1820%

23.04 TFLOPS

Radeon HD 4870 Mac Edition

VS

Radeon RX 6900 XT

Graphics Card

Jan 2009

Release Date

Oct 2020

Radeon R700

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1825 MHz

-

Boost Clock

2250 MHz

850 MHz

Memory Clock

2000 MHz

Memory

512MB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

256bit

108.8GB/s

Bandwidth

512.0GB/s

Render Config

10

Compute Units

80

-

800

Shading Units

5120

40

TMUs

320

16

ROPs

128

-

RT Cores

80

16 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

12.00 GPixel/s

Pixel Rate

288.0 GPixel/s

30.00 GTexel/s

Texture Rate

720.0 GTexel/s

-

FP16 (half)

46.08 TFLOPS

1200 GFLOPS

FP32 (float)

23.04 TFLOPS

240.0 GFLOPS

FP64 (double)

1440 GFLOPS

Board Design

150W

TDP

300W

450 W

Suggested PSU

700 W

1x DVI 1x mini-DisplayPort 1.0

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

RV770

GPU Name

Navi 21

RV770 XT Mac (215-0669080)

GPU Variant

Navi 21 XTX (215-121000167)

TeraScale

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

55 nm

Process Size

7 nm

0.956 billion

Transistors

26.8 billion

256 mm²

Die Size

520 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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