AMD Radeon RX 7900 XT vs ATI Radeon HD 3870 Mac Edition

VS

AMD Radeon RX 7900 XT

ATI Radeon HD 3870 Mac Edition

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 512MB VRAM Radeon HD 3870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XT 's Advantages

Released 14 years and 5 months late

Boost Clock2394MHz

More VRAM (20GB vs 512GB)

Larger VRAM bandwidth (800.0GB/s vs 72.06GB/s)

5056 additional rendering cores

ATI Radeon HD 3870 Mac Edition 's Advantages

Lower TDP (106W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +10258%

51.48 TFLOPS

Radeon HD 3870 Mac Edition

0.497 TFLOPS

Radeon RX 7900 XT

VS

Radeon HD 3870 Mac Edition

Graphics Card

Nov 2022

Release Date

Jun 2008

Navi III

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1387 MHz

Base Clock

-

2394 MHz

Boost Clock

-

2500 MHz

Memory Clock

1126 MHz

Memory

20GB

Memory Size

512MB

GDDR6

Memory Type

GDDR4

320bit

Memory Bus

256bit

800.0GB/s

Bandwidth

72.06GB/s

Render Config

84

Compute Units

4

-

5376

Shading Units

320

336

TMUs

16

192

ROPs

16

-

84

RT Cores

-

256 KB per Array

L1 Cache

-

6 MB

L2 Cache

256 KB

80 MB

L3 Cache

-

Theoretical Performance

459.6 GPixel/s

Pixel Rate

12.43 GPixel/s

804.4 GTexel/s

Texture Rate

12.43 GTexel/s

103.0 TFLOPS

FP16 (half)

-

51.48 TFLOPS

FP32 (float)

497.3 GFLOPS

1.609 TFLOPS

FP64 (double)

99.46 GFLOPS

Board Design

300W

TDP

106W

700 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x S-Video

2x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Navi 31

GPU Name

RV670

Navi 31 XT (215-145000156)

GPU Variant

RV670 XT (215-0708005)

RDNA 3.0

Architecture

TeraScale

TSMC

Foundry

TSMC

5 nm

Process Size

55 nm

57.7 billion

Transistors

0.666 billion

529 mm²

Die Size

192 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.2

OpenCL

N/A

1.3

Vulkan

N/A

-

6.7

Shader Model

4.1

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