GPU Comparison

A

AMD

RADEON

AMD Radeon R6 M255DX

CORE STATE Jet

VRAM System Shared

CLOCK SPEED 855 MHz

TDP —

BUS WIDTH System Shared

ARCHITECTURE GCN 1.0

nm

PROCESS 28 nm

LAUNCH DATE 2014

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_vulkan

4,867

89,263

3dmark_3dmark_steel_nomad_dx12

N/A

1,804

geekbench_metal

N/A

108,608

geekbench_opencl

N/A

82,736

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

R6 M255DX

RX 6600 XT

Core Specs

Shading Units

320

2,048 +540.0%

Shaders

320

2,048 +540.0%

TMUs

20

128 +540.0%

ROPs

8

64 +700.0%

Compute Units

5

32 +540.0%

Clocks

Base Clock

780 MHz

1968 MHz

Boost Clock

855 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

16 KB (per CU)

128 KB per Array

L2 Cache

128 KB

2 MB

L3 Cache

—

32 MB

L0 Cache

—

32 KB per WGP

Performance

Pixel Rate

6.840 GPixel/s

165.7 GPixel/s

Texture Rate

17.10 GTexel/s

331.4 GTexel/s

FP32 (TFLOPS)

547.2 GFLOPS

10.60 TFLOPS

FP64 (TFLOPS)

34.20 GFLOPS (1:16)

662.8 GFLOPS (1:16)

FP16 (TFLOPS)

—

21.21 TFLOPS (2:1)

AI/RT

RT Cores

—

32

Power

TDP

—

160 W

TDP (W)

—

160

Suggested PSU

—

450 W

Power Connectors

—

1x 8-pin

Architecture

Architecture

GCN 1.0

RDNA 2.0

GPU Name

Jet

Navi 23

Generation

Gem System Hybrid (Rx M200)

Navi II (RX 6000)

Process Size

28 nm

7 nm

Transistors

690 million

11,060 million

Die Size

56 mm²

237 mm²

Foundry

TSMC

TSMC

Density

12.3M / mm²

46.7M / mm²

API Support

DirectX

12 (11_1)

12 Ultimate (12_2)

OpenGL

4.6

4.6

Vulkan

1.2.170

1.4

OpenCL

2.1 (1.2)

2.1

Shader Model

6.5 (5.1)

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

IGP

PCIe 4.0 x8

Other

Launch Price

—

379 USD

Production

End-of-life

End-of-life

Predecessor

—

Navi

Successor

—

Navi III

View Radeon R6 M255DX Details View Radeon RX 6600 XT Details