According to the Product Description 5m cable is up to 2560x1600 (WUXGQ) transferred in default refresh (60 Hz). My copy of 5m cable failed to even reach Full HD 1080 p. No trouble-free operation is possible at 1920x1080 @ 60Hz. Shown is constant glitches. The desired resolution (2560x1440px @ 60 Hz) has transferred the cable with much more dropouts. (The intervening resolutions 1920x1200 and 2048x1152 also suffered from massive interference with the use of this cable.)
With a Dual Link DVI cable transmission to 2048x1152px works without problems. With a DP cable from Dell transferring 2560x1440px works without problems. It really is so the cord.