This IDC update provides the worldwide market and vendor share results for x86 PC core logic chipset vendors in these segments for the first calendar quarter of 2012:

• Worldwide overall x86 PC core logic chipset unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide overall x86 PC core logic chipset revenue share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide desktop x86 PC core logic chipset unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide mobile x86 PC core logic chipset unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC server core logic chipset unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset with an integrated graphics processing unit (GPU) market share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset supporting only a discrete graphics processing unit market share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset supporting an Intel Microprocessor unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset supporting an AMD microprocessor unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset supporting a VIA microprocessor unit share by vendor, 1Q12 with 4Q11 and 1Q11 comparison
• Worldwide x86 PC core logic chipset overall average selling prices and unit shipments for 1Q10–1Q12.

The accompanying Excel spreadsheet data file includes the results of IDC's quarterly x86 PC core logic chipset studies from 1Q09 to 1Q12 in a pivot table format. The data list for the pivot table, definitions, and methodology is also included.

Drafts of this IDC update and data file were sent via email to clients of IDC's Semiconductors: Personal Computing research program on June 1, 2012.