AMD Radeon RX 6600 XT vs ATI Radeon HD 3870 X2

VS

AMD Radeon RX 6600 XT ATI Radeon HD 3870 X2

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 XT 's Advantages

Released 13 years and 6 months late

Boost Clock2589MHz

Larger VRAM bandwidth (256.0GB/s vs 57.66GB/s)

1728 additional rendering cores

Lower TDP (160W vs 165W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +1907%

10.6 TFLOPS

Radeon HD 3870 X2

0.528 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 3870 X2

Graphics Card

Jul 2021

Release Date

Jan 2008

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1968 MHz

Base Clock

-

2589 MHz

Boost Clock

-

2000 MHz

Memory Clock

901 MHz

Memory

8GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

128bit

Memory Bus

256bit

256.0GB/s

Bandwidth

57.66GB/s

Render Config

-

SM Count

-

32

Compute Units

4

2048

Shading Units

320

128

TMUs

16

64

ROPs

16

-

Tensor Cores

-

32

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

256 KB

Theoretical Performance

165.7 GPixel/s

Pixel Rate

13.20 GPixel/s

331.4 GTexel/s

Texture Rate

13.20 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

528.0 GFLOPS

662.8 GFLOPS

FP64 (double)

105.6 GFLOPS

Graphics Processor

Navi 23

GPU Name

R680

Navi 23 XT (215-130000006)

GPU Variant

R680 XT (215-0708017)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

11.06 billion

Transistors

0.666 billion

237 mm²

Die Size

192 mm²

Board Design

160W

TDP

165W

450 W

Suggested PSU

450 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x S-Video

1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.1

OpenCL

N/A

1.3

Vulkan

N/A

-

CUDA

-

6.7

Shader Model

4.1

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