AMD Radeon RX 7900 XT vs AMD Radeon RX 6600 XT

VS

AMD Radeon RX 7900 XT

AMD Radeon RX 6600 XT

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 8GB VRAM Radeon RX 6600 XT 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 1 years and 4 months late

More VRAM (20GB vs 8GB)

Larger VRAM bandwidth (800.0GB/s vs 256.0GB/s)

3328 additional rendering cores

AMD Radeon RX 6600 XT 's Advantages

Boost Clock has increased by 8% (2589MHz vs 2394MHz)

Lower TDP (160W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +385%

51.48 TFLOPS

Radeon RX 6600 XT

10.6 TFLOPS

3DMark Time Spy

Radeon RX 7900 XT +180%

26911

Radeon RX 6600 XT

9579

Blender

Radeon RX 7900 XT +226%

3905

Radeon RX 6600 XT

1196

Shadow of the Tomb Raider 2160p

Radeon RX 7900 XT +168%

102

Radeon RX 6600 XT

38

Shadow of the Tomb Raider 1440p

Radeon RX 7900 XT +184%

205

Radeon RX 6600 XT

72

Shadow of the Tomb Raider 1080p

Radeon RX 7900 XT +151%

299

Radeon RX 6600 XT

119

Cyberpunk 2077 2160p

Radeon RX 7900 XT +72%

50

Radeon RX 6600 XT

29

Cyberpunk 2077 1440p

Radeon RX 7900 XT +161%

94

Radeon RX 6600 XT

36

Cyberpunk 2077 1080p

Radeon RX 7900 XT +172%

158

Radeon RX 6600 XT

58

GTA 5 2160p

Radeon RX 7900 XT +178%

170

Radeon RX 6600 XT

61

GTA 5 1440p

Radeon RX 7900 XT +107%

170

Radeon RX 6600 XT

82

GTA 5 1080p

Radeon RX 7900 XT +27%

190

Radeon RX 6600 XT

149

Horizon Forbidden West 1080p

Radeon RX 7900 XT +104%

131

Radeon RX 6600 XT

64

Horizon Forbidden West 1440p

Radeon RX 7900 XT +118%

105

Radeon RX 6600 XT

48

Horizon Forbidden West 2160p

Radeon RX 7900 XT +161%

68

Radeon RX 6600 XT

26

Radeon RX 7900 XT

VS

Radeon RX 6600 XT

Graphics Card

Nov 2022

Release Date

Jul 2021

Navi III

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

1387 MHz

Base Clock

1968 MHz

2394 MHz

Boost Clock

2589 MHz

2500 MHz

Memory Clock

2000 MHz

Memory

20GB

Memory Size

8GB

GDDR6

Memory Type

GDDR6

320bit

Memory Bus

128bit

800.0GB/s

Bandwidth

256.0GB/s

Render Config

84

Compute Units

32

-

5376

Shading Units

2048

336

TMUs

128

192

ROPs

64

-

84

RT Cores

32

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

2 MB

80 MB

L3 Cache

32 MB

Theoretical Performance

459.6 GPixel/s

Pixel Rate

165.7 GPixel/s

804.4 GTexel/s

Texture Rate

331.4 GTexel/s

103.0 TFLOPS

FP16 (half)

21.21 TFLOPS

51.48 TFLOPS

FP32 (float)

10.60 TFLOPS

1.609 TFLOPS

FP64 (double)

662.8 GFLOPS

Board Design

300W

TDP

160W

700 W

Suggested PSU

450 W

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

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

2x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Navi 31

GPU Name

Navi 23

Navi 31 XT (215-145000156)

GPU Variant

Navi 23 XT (215-130000006)

RDNA 3.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

5 nm

Process Size

7 nm

57.7 billion

Transistors

11.06 billion

529 mm²

Die Size

237 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

2.2

OpenCL

2.1

1.3

Vulkan

1.3

-

6.7

Shader Model

6.7

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