AMD Radeon RX 6600 vs AMD Radeon RX 6900 XTX

VS

AMD Radeon RX 6600

AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 and 16GB VRAM Radeon RX 6900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 's Advantages

Boost Clock has increased by 2% (2491MHz vs 2435MHz)

Lower TDP (132W vs 330W)

AMD Radeon RX 6900 XTX 's Advantages

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (576.0GB/s vs 224.0GB/s)

3328 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon RX 6600

8.928 TFLOPS

Radeon RX 6900 XTX +179%

24.93 TFLOPS

Radeon RX 6600

VS

Radeon RX 6900 XTX

Graphics Card

Oct 2021

Release Date

Unknown

Navi II

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 4.0 x16

Clock Speeds

1626 MHz

Base Clock

2075 MHz

2491 MHz

Boost Clock

2435 MHz

1750 MHz

Memory Clock

2250 MHz

Memory

8GB

Memory Size

16GB

GDDR6

Memory Type

GDDR6

128bit

Memory Bus

256bit

224.0GB/s

Bandwidth

576.0GB/s

Render Config

28

Compute Units

80

-

1792

Shading Units

5120

112

TMUs

320

64

ROPs

128

-

28

RT Cores

80

128 KB per Array

L1 Cache

128 KB per Array

2 MB

L2 Cache

4 MB

32 MB

L3 Cache

128 MB

Theoretical Performance

159.4 GPixel/s

Pixel Rate

311.7 GPixel/s

279.0 GTexel/s

Texture Rate

779.2 GTexel/s

17.86 TFLOPS

FP16 (half)

49.87 TFLOPS

8.928 TFLOPS

FP32 (float)

24.93 TFLOPS

558.0 GFLOPS

FP64 (double)

1.558 TFLOPS

Board Design

132W

TDP

330W

300 W

Suggested PSU

700 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Navi 23

GPU Name

Navi 21

Navi 23 XL (215-130000016)

GPU Variant

Navi 21 XTXH (215-121000247)

RDNA 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

7 nm

11.06 billion

Transistors

26.8 billion

237 mm²

Die Size

520 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.1

OpenCL

2.1

1.3

Vulkan

1.3

-

6.5

Shader Model

6.5

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