AMD Radeon RX 6850M XT vs NVIDIA GeForce GTX 660M Mac Edition

VS

AMD Radeon RX 6850M XT

NVIDIA GeForce GTX 660M Mac Edition

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 6850M XT and 512MB VRAM GeForce GTX 660M Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6850M XT 's Advantages

Released 8 years and 9 months late

Boost Clock2581MHz

More VRAM (12GB vs 512GB)

Larger VRAM bandwidth (384.0GB/s vs 80.00GB/s)

2176 additional rendering cores

NVIDIA GeForce GTX 660M Mac Edition 's Advantages

Lower TDP (50W vs 165W)

Score

Benchmark

FP32 (float)

Radeon RX 6850M XT +1709%

13.21 TFLOPS

GeForce GTX 660M Mac Edition

0.73 TFLOPS

Radeon RX 6850M XT

VS

GeForce GTX 660M Mac Edition

Graphics Card

Jan 2022

Release Date

Apr 2013

Mobility Radeon

Generation

GeForce 600M

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

2321 MHz

Base Clock

-

2581 MHz

Boost Clock

-

2000 MHz

Memory Clock

1250 MHz

Memory

12GB

Memory Size

512MB

GDDR6

Memory Type

GDDR5

192bit

Memory Bus

128bit

384.0GB/s

Bandwidth

80.00GB/s

Render Config

40

Compute Units

-

2560

Shading Units

384

160

TMUs

32

64

ROPs

16

-

40

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per SMX)

3 MB

L2 Cache

256 KB

96 MB

L3 Cache

-

Theoretical Performance

165.2 GPixel/s

Pixel Rate

7.600 GPixel/s

413.0 GTexel/s

Texture Rate

30.40 GTexel/s

26.43 TFLOPS

FP16 (half)

-

13.21 TFLOPS

FP32 (float)

729.6 GFLOPS

825.9 GFLOPS

FP64 (double)

30.40 GFLOPS

Board Design

165W

TDP

50W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Navi 22

GPU Name

GK107

Navi 22 XTM

GPU Variant

-

RDNA 2.0

Architecture

Kepler

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

17.2 billion

Transistors

1.27 billion

335 mm²

Die Size

118 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.3

Vulkan

1.1

-

CUDA

3.0

6.5

Shader Model

5.1

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