The discription says:
The maximum port charge possible is 1.5 amps depending on power supply used.
1.5 A is not enough current for one stick @250 MHz. I don´t know what "depending on power supply used" means. I would buy another one. Make sure there is no limitation on the current per port. In my experience you need about 3 A per stick @250 MHz.
It can run at least 18 at 200 freq as that's my current config - 60 amps is a lot and this isn't limited by the PSU/cable like many other hubs. You're getting all 60w delivered to the ports. Run it at 220V if you can - more efficient (but not required).