AMD Radeon RX 6900 XT vs AMD Radeon RX 6600

VS

AMD Radeon RX 6900 XT AMD Radeon RX 6600

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

Main Differences

AMD Radeon RX 6900 XT 's Advantages

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (512.0GB/s vs 224.0GB/s)

3328 additional rendering cores

AMD Radeon RX 6600 's Advantages

Released 1 years late

Boost Clock has increased by 11% (2491MHz vs 2250MHz)

Lower TDP (132W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XT +158%

23.04 TFLOPS

Radeon RX 6600

8.928 TFLOPS

3DMark Time Spy

Radeon RX 6900 XT +158%

20915

Radeon RX 6600

8081

Shadow of the Tomb Raider 2160p

Radeon RX 6900 XT +132%

79

Radeon RX 6600

34

Shadow of the Tomb Raider 1440p

Radeon RX 6900 XT +100%

142

Radeon RX 6600

71

Shadow of the Tomb Raider 1080p

Radeon RX 6900 XT +53%

194

Radeon RX 6600

126

Cyberpunk 2077 2160p

Radeon RX 6900 XT +175%

66

Radeon RX 6600

24

Cyberpunk 2077 1440p

Radeon RX 6900 XT +148%

77

Radeon RX 6600

31

Cyberpunk 2077 1080p

Radeon RX 6900 XT +132%

116

Radeon RX 6600

50

Battlefield 5 2160p

Radeon RX 6900 XT +159%

114

Radeon RX 6600

44

Battlefield 5 1440p

Radeon RX 6900 XT +104%

200

Radeon RX 6600

98

Battlefield 5 1080p

Radeon RX 6900 XT +58%

201

Radeon RX 6600

127

GTA 5 2160p

Radeon RX 6900 XT +111%

127

Radeon RX 6600

60

GTA 5 1440p

Radeon RX 6900 XT +130%

152

Radeon RX 6600

66

GTA 5 1080p

Radeon RX 6900 XT +3%

189

Radeon RX 6600

182

Radeon RX 6900 XT

VS

Radeon RX 6600

Graphics Card

Oct 2020

Release Date

Oct 2021

Navi II

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

1825 MHz

Base Clock

1626 MHz

2250 MHz

Boost Clock

2491 MHz

2000 MHz

Memory Clock

1750 MHz

Memory

16GB

Memory Size

8GB

GDDR6

Memory Type

GDDR6

256bit

Memory Bus

128bit

512.0GB/s

Bandwidth

224.0GB/s

Render Config

-

SM Count

-

80

Compute Units

28

5120

Shading Units

1792

320

TMUs

112

128

ROPs

64

-

Tensor Cores

-

80

RT Cores

28

128 KB per Array

L1 Cache

128 KB per Array

4 MB

L2 Cache

2 MB

Theoretical Performance

288.0 GPixel/s

Pixel Rate

159.4 GPixel/s

720.0 GTexel/s

Texture Rate

279.0 GTexel/s

46.08 TFLOPS

FP16 (half)

17.86 TFLOPS

23.04 TFLOPS

FP32 (float)

8.928 TFLOPS

1440 GFLOPS

FP64 (double)

558.0 GFLOPS

Graphics Processor

Navi 21

GPU Name

Navi 23

Navi 21 XTX (215-121000167)

GPU Variant

Navi 23 XL (215-130000016)

RDNA 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

7 nm

26.8 billion

Transistors

11.06 billion

520 mm²

Die Size

237 mm²

Board Design

300W

TDP

132W

700 W

Suggested PSU

300 W

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

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

2x 8-pin

Power Connectors

1x 8-pin

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

-

CUDA

-

6.5

Shader Model

6.5

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