AMD Radeon RX 6650 XT vs ATI Radeon HD 3870 X2

VS

AMD Radeon RX 6650 XT

ATI Radeon HD 3870 X2

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6650 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 6650 XT 's Advantages

Released 14 years and 4 months late

Boost Clock2635MHz

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (280.3GB/s vs 57.66GB/s)

1728 additional rendering cores

ATI Radeon HD 3870 X2 's Advantages

Lower TDP (165W vs 176W)

Score

Benchmark

FP32 (float)

Radeon RX 6650 XT +1943%

10.79 TFLOPS

Radeon HD 3870 X2

0.528 TFLOPS

Radeon RX 6650 XT

VS

Radeon HD 3870 X2

Graphics Card

May 2022

Release Date

Jan 2008

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

2055 MHz

Base Clock

-

2635 MHz

Boost Clock

-

2190 MHz

Memory Clock

901 MHz

Memory

8GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

128bit

Memory Bus

256bit

280.3GB/s

Bandwidth

57.66GB/s

Render Config

32

Compute Units

4

-

2048

Shading Units

320

128

TMUs

16

64

ROPs

16

-

32

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

168.6 GPixel/s

Pixel Rate

13.20 GPixel/s

337.3 GTexel/s

Texture Rate

13.20 GTexel/s

21.59 TFLOPS

FP16 (half)

-

10.79 TFLOPS

FP32 (float)

528.0 GFLOPS

674.6 GFLOPS

FP64 (double)

105.6 GFLOPS

Board Design

176W

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 Processor

Navi 23

GPU Name

R680

Navi 23 KXT (215-130000136)

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

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

-

6.5

Shader Model

4.1

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