slow Lan transfer speed

[kuwaiti]

hi
when i transfer from PC to storage network its only 20MB in a sec

why too slow for cat 6 ? how can i fix it ?

motherboard : rampage extreme ii 2 lan speed 10/100/1000

swich : D-link Gigabit green ethernet DGS-1008D speed 10/100/1000

network storage iomega lan speed 10/100/1000

cables / cat6

links :
[ame="http://www.amazon.co.uk/D-Link-8-Port-Gigabit-Ethernet-DGS-1008D/dp/B00011PFWG"]D-Link 8-Port Gigabit Green Ethernet Switch (DGS-1008D): Amazon.co.uk: Computers & Accessories[/ame]

https://iomega-na-en.custhelp.com/app/answers/detail/a_id/27156

[kuwaiti]

or is it normal ?
because when i use cat6 or cat5 ethernet i get same speed

[kuwaiti]

no help ?

[rg66]

Are you using Windows 7? This seems to be a common problem. Check out this Google search.