That sums up the appeal of the 27-inch Lenovo ThinkCentre M90a Pro Gen 6 (starts at $1,499; $2,204.99 as tested). The ThinkCentre M90a Pro Gen 6 has a 27-inch QHD (2,560-by-1,440) IPS display that refreshes at up to 120Hz. Ports: Plenty of Them, But Some in Tricky SpotsThe ThinkCentre M90a Pro Gen 6 comes with plenty of ports. None of these machines is a gaming desktop, but the ThinkCentre M90a Pro Gen 6 placed near the bottom of the pack. According to my colorimeter, the ThinkCentre M90a Pro Gen 6 display outperformed most IPS displays in terms of color gamut coverage.