GPU Comparison

A

AMD

RADEON

AMD Radeon 660M

CORE STATE Rembrandt

VRAM System Shared

CLOCK SPEED 1900 MHz

TDP 40 W

BUS WIDTH System Shared

ARCHITECTURE RDNA 2.0

nm

PROCESS 6 nm

LAUNCH DATE 2022

VS

A

AMD

RADEON

Radeon RX 6600 XT

CORE STATE Navi 23

VRAM 8 GB

CLOCK SPEED 2589 MHz

TDP 160 W

BUS WIDTH 128 bit

ARCHITECTURE RDNA 2.0

nm

PROCESS 7 nm

LAUNCH DATE 2021

PERFORMANCE BENCHMARKS

geekbench_opencl

12,876

82,736

geekbench_vulkan

14,748

89,263

3dmark_3dmark_steel_nomad_dx12

N/A

1,804

geekbench_metal

N/A

108,608

passmark_directx_10

N/A

109

passmark_directx_11

N/A

163

passmark_directx_12

N/A

61

passmark_directx_9

N/A

194

passmark_g2d

N/A

912

passmark_g3d

N/A

16,461

passmark_gpu_compute

N/A

7,520

DETAILED SPECIFICATIONS

SPECIFICATION

660M

RX 6600 XT

Core Specs

Shading Units

384

2,048 +433.3%

Shaders

384

2,048 +433.3%

TMUs

24

128 +433.3%

ROPs

16

64 +300.0%

Compute Units

6

32 +433.3%

Clocks

Base Clock

1500 MHz

1968 MHz

Boost Clock

1900 MHz

2589 MHz

Game Clock

—

2359 MHz

Memory Clock

System Shared

2000 MHz 16 Gbps effective

Memory

Memory Size

System Shared

8 GB

VRAM (MB)

—

8,192

Memory Type

System Shared

GDDR6

Memory Bus

System Shared

128 bit

Bandwidth

System Dependent

256.0 GB/s

Cache

L1 Cache

128 KB per Array

128 KB per Array

L2 Cache

2 MB

2 MB

L3 Cache

—

32 MB

L0 Cache

32 KB per WGP

32 KB per WGP

Performance

Pixel Rate

30.40 GPixel/s

165.7 GPixel/s

Texture Rate

45.60 GTexel/s

331.4 GTexel/s

FP32 (TFLOPS)

1,459.2 GFLOPS

10.60 TFLOPS

FP64 (TFLOPS)

91.20 GFLOPS (1:16)

662.8 GFLOPS (1:16)

FP16 (TFLOPS)

2.918 TFLOPS (2:1)

21.21 TFLOPS (2:1)

AI/RT

RT Cores

6

32 +433.3%

Power

TDP

40 W

160 W

TDP (W)

40

160 +300.0%

Suggested PSU

—

450 W

Power Connectors

None

1x 8-pin

Architecture

Architecture

RDNA 2.0

RDNA 2.0

GPU Name

Rembrandt

Navi 23

Generation

Navi II IGP (Rembrandt Mobile)

Navi II (RX 6000)

Process Size

6 nm

7 nm

Transistors

13,100 million

11,060 million

Die Size

208 mm²

237 mm²

Foundry

TSMC

TSMC

Density

63.0M / mm²

46.7M / mm²

API Support

DirectX

12 Ultimate (12_2)

12 Ultimate (12_2)

OpenGL

4.6

4.6

Vulkan

1.4

1.4

OpenCL

2.0

2.1

Shader Model

6.8

6.8

Physical

Slot Width

IGP

Dual-slot

Length

—

190 mm 7.5 inches

Height

—

110 mm 4.3 inches

Outputs

Portable Device Dependent

1x HDMI 2.13x DisplayPort 1.4a

Bus Interface

PCIe 4.0 x8

PCIe 4.0 x8

Other

Launch Price

—

379 USD

Production

End-of-life

End-of-life

Predecessor

Vega II IGP

Navi

Successor

Navi III IGP

Navi III

View Radeon 660M Details View Radeon RX 6600 XT Details