LG will be the first to sell a 4K monitor with AMD FreeSync technology, beating models from rival Samsung by a nose. The technology in its 27-inch 27MU67 is similar to NVIDIA's G-Sync, matching monitor and GPU refresh rates to eliminate tearing, stutter and other gaming issues -- as long as you have a compatible AMD graphics card or chip. Like Samsung, LG makes its own panels and it shows in the specs. The IPS screen can run at 40 to 60fps with 9.7 milliseconds of input lag, while being decent for color pros with a 99 percent sRGB gamut and 10-bit interpolated color. It'll come calibrated out of the box later this month at select retailers for $599 -- quite a drop in price from last year.