AMD Radeon 540 Mobile vs AMD Radeon 550X 640SP

Table of Contents

Graphics Processor

GPU model Lexa Lexa
GPU variant Lexa PRO (215-0904018) Lexa PRO (215-0904018)
Architecture GCN 4.0 GCN 4.0
Foundry GlobalFoundries GlobalFoundries
Manufacturing process 14 nm 14 nm
Number of transistors 2,200 million 2,200 million
Die size 103 mm² 103 mm²

Mobile graphics

Release date Mar 26th, 2019
Generation Mobility Radeon (M500)
Production End-of-life
Interface PCIe 3.0 x8
Predecessor Crystal System

Clocks

Base clock 1100 MHz 1019 MHz
Boost clock 1124 MHz 1071 MHz
Memory clock 1500 MHz 6 Gbps effective 1500 MHz 6 Gbps effective

Memory Configuration

Memory size 2 GB 4 GB
Memory type GDDR5 GDDR5
Memory bus width 64 bit 64 bit
Bandwidth 48.00 GB/s 48.00 GB/s

Render Configuration

Shading units 512 640
TMUs 32 40
ROPs 16 16
Compute units 8 10
Cache L1 16 KB (per CU) 16 KB (per CU)
Cache L2 256 KB 256 KB

Performance

Pixel rate 17.98 GPixel/s 17.14 GPixel/s
Texture rate 35.97 GTexel/s 42.84 GTexel/s
FP16 (half) performance 1,151 GFLOPS (1:1) 1,371 GFLOPS (1:1)
FP32 (float) performance 1,151 GFLOPS 1,371 GFLOPS
FP64 (double) performance 71.94 GFLOPS (1:16) 85.68 GFLOPS (1:16)

Dimensions & Outputs

Slot width Dual-slot IGP
TDP 50 W 50 W
Outputs No outputs 1x DVI1x HDMI1x DisplayPort
Power connectors None None
Suggested PSU 250 W

API Support & Features

DirectX 12 (12_0) 12 (12_0)
OpenGL 4.6 4.6
OpenCL 2.1 2.1
Vulkan 1.2 1.2
Shader model 6.4 6.4

Other Features

Graphics Card

Release date Apr 11th, 2018
Generation Polaris
Production End-of-life
Interface PCIe 3.0 x8
Predecessor Polaris
Successor Vega

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