The Infinium Global Diversity Array with Cytogenetics-8 is a scalable, cost-effective microarray that contains approximately 1.8M probes, with 160K probes supplementing the current Global Diversity Array manifest across more than 4800 tiered genes. Supplemental probes were selected based on the input from a cytogenetics research consortium and strategically localized near exons, in spatial consideration of existing probe placement, to deliver optimal performance in copy number variation analysis.