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 6800 XT

CORE STATE Navi 21

VRAM 16 GB

CLOCK SPEED 2250 MHz

TDP 300 W

BUS WIDTH 256 bit

ARCHITECTURE RDNA 2.0

nm

PROCESS 7 nm

LAUNCH DATE 2020

PERFORMANCE BENCHMARKS

geekbench_vulkan

4,867

152,200

3dmark_3dmark_steel_nomad_dx12

N/A

3,689

geekbench_metal

N/A

199,366

geekbench_opencl

N/A

154,506

passmark_directx_10

N/A

155

passmark_directx_11

N/A

264

passmark_directx_12

N/A

100

passmark_directx_9

N/A

265

passmark_g2d

N/A

1,030

passmark_g3d

N/A

24,980

passmark_gpu_compute

N/A

13,245

DETAILED SPECIFICATIONS

SPECIFICATION

R6 M255DX

RX 6800 XT

Core Specs

Shading Units

320

4,608 +1340.0%

Shaders

320

4,608 +1340.0%

TMUs

20

288 +1340.0%

ROPs

8

128 +1500.0%

Compute Units

5

72 +1340.0%

Clocks

Base Clock

780 MHz

1825 MHz

Boost Clock

855 MHz

2250 MHz

Game Clock

—

2015 MHz

Memory Clock

System Shared

2000 MHz 16 Gbps effective

Memory

Memory Size

System Shared

16 GB

VRAM (MB)

—

16,384

Memory Type

System Shared

GDDR6

Memory Bus

System Shared

256 bit

Bandwidth

System Dependent

512.0 GB/s

Cache

L1 Cache

16 KB (per CU)

128 KB per Array

L2 Cache

128 KB

4 MB

L3 Cache

—

128 MB

L0 Cache

—

32 KB per WGP

Performance

Pixel Rate

6.840 GPixel/s

288.0 GPixel/s

Texture Rate

17.10 GTexel/s

648.0 GTexel/s

FP32 (TFLOPS)

547.2 GFLOPS

20.74 TFLOPS

FP64 (TFLOPS)

34.20 GFLOPS (1:16)

1,296.0 GFLOPS (1:16)

FP16 (TFLOPS)

—

41.47 TFLOPS (2:1)

AI/RT

RT Cores

—

72

Power

TDP

—

300 W

TDP (W)

—

300

Suggested PSU

—

700 W

Power Connectors

—

2x 8-pin

Architecture

Architecture

GCN 1.0

RDNA 2.0

GPU Name

Jet

Navi 21

Generation

Gem System Hybrid (Rx M200)

Navi II (RX 6000)

Process Size

28 nm

7 nm

Transistors

690 million

26,800 million

Die Size

56 mm²

520 mm²

Foundry

TSMC

TSMC

Density

12.3M / mm²

51.5M / 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

—

267 mm 10.5 inches

Height

—

120 mm 4.7 inches

Outputs

Portable Device Dependent

1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C

Bus Interface

IGP

PCIe 4.0 x16

Other

Launch Price

—

649 USD

Production

End-of-life

End-of-life

Predecessor

—

Navi

Successor

—

Navi III

View Radeon R6 M255DX Details View Radeon RX 6800 XT Details