AMD Radeon RX 7900 GRE vs AMD Radeon RX 6600 XT

VS

AMD Radeon RX 7900 GRE

AMD Radeon RX 6600 XT

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7900 GRE 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 GRE 's Advantages

Released 2 years late

More VRAM (16GB vs 8GB)

Larger VRAM bandwidth (576.0GB/s vs 256.0GB/s)

3072 additional rendering cores

AMD Radeon RX 6600 XT 's Advantages

Boost Clock has increased by 15% (2589MHz vs 2245MHz)

Lower TDP (160W vs 260W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 GRE +333%

45.98 TFLOPS

Radeon RX 6600 XT

10.6 TFLOPS

3DMark Time Spy

Radeon RX 7900 GRE +133%

22344

Radeon RX 6600 XT

9579

Blender

Radeon RX 7900 GRE +160%

3114

Radeon RX 6600 XT

1196

Cyberpunk 2077 2160p

Radeon RX 7900 GRE +37%

40

Radeon RX 6600 XT

29

Cyberpunk 2077 1440p

Radeon RX 7900 GRE +144%

88

Radeon RX 6600 XT

36

Cyberpunk 2077 1080p

Radeon RX 7900 GRE +124%

130

Radeon RX 6600 XT

58

Radeon RX 7900 GRE

VS

Radeon RX 6600 XT

Graphics Card

Jul 2023

Release Date

Jul 2021

Navi III

Generation

Navi II

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

1287 MHz

Base Clock

1968 MHz

2245 MHz

Boost Clock

2589 MHz

2250 MHz

Memory Clock

2000 MHz

Memory

16GB

Memory Size

8GB

GDDR6

Memory Type

GDDR6

256bit

Memory Bus

128bit

576.0GB/s

Bandwidth

256.0GB/s

Render Config

80

Compute Units

32

-

5120

Shading Units

2048

320

TMUs

128

160

ROPs

64

-

80

RT Cores

32

256 KB per Array

L1 Cache

128 KB per Array

6 MB

L2 Cache

2 MB

64 MB

L3 Cache

32 MB

Theoretical Performance

359.2 GPixel/s

Pixel Rate

165.7 GPixel/s

718.4 GTexel/s

Texture Rate

331.4 GTexel/s

91.96 TFLOPS

FP16 (half)

21.21 TFLOPS

45.98 TFLOPS

FP32 (float)

10.60 TFLOPS

1437 GFLOPS

FP64 (double)

662.8 GFLOPS

Board Design

260W

TDP

160W

600 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 XL (215-145000206)

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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