AMD Radeon 540 Mobile vs ATI Radeon HD 4870 Mac Edition

Table of Contents

Graphics Processor

GPU model Lexa RV770
GPU variant Lexa PRO (215-0904018) RV770 XT Mac (215-0669080)
Architecture GCN 4.0 TeraScale
Foundry GlobalFoundries TSMC
Manufacturing process 14 nm 55 nm
Number of transistors 2,200 million 956 million
Die size 103 mm² 256 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
Boost clock 1124 MHz
Memory clock 1500 MHz 6 Gbps effective 850 MHz 3.4 Gbps effective
GPU clock 750 MHz

Memory Configuration

Memory size 2 GB 512 MB
Memory type GDDR5 GDDR5
Memory bus width 64 bit 256 bit
Bandwidth 48.00 GB/s 108.8 GB/s

Render Configuration

Shading units 512 800
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 12.00 GPixel/s
Texture rate 35.97 GTexel/s 30.00 GTexel/s
FP16 (half) performance 1,151 GFLOPS (1:1)
FP32 (float) performance 1,151 GFLOPS 1,200 GFLOPS
FP64 (double) performance 71.94 GFLOPS (1:16) 240.0 GFLOPS (1:5)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
TDP 50 W 150 W
Outputs No outputs 1x DVI1x mini-DisplayPort
Power connectors None 2x 6-pin
Length 250 mm 9.8 inches
Suggested PSU 450 W
Board number B771

API Support & Features

DirectX 12 (12_0) 10.1 (10_1)
OpenGL 4.6 3.3
OpenCL 2.1 1.1
Vulkan 1.2
Shader model 6.4 4.1

Other Features

Graphics Card

Release date Jan 6th, 2009
Generation Radeon R700
Production End-of-life
Interface PCIe 2.0 x16
Reviews 135 in our database
Predecessor Radeon R600
Successor Evergreen

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