The Infinium HD Human1M-Duo (two samples/chip) and the Human610-Quad (four samples/chip) feature up to 2.3 million single nucleotide polymorphisms (SNPs) per BeadChip. Both arrays on the Human1M-Duo contain markers for more than one million diverse genetic variants, all of which can be used for both whole-genome genotyping and copy number variation (CNV) analysis. The four-sample format of the Human610-Quad BeadChip provides an increase in sample throughput and reduced handling in the lab. This chip offers 550,000 SNPs plus an additional 60,000 genetic markers per sample. Both products include high-value, proprietary CNV content developed in conjunction with deCODE genetics, and only found on Illumina arrays.