What are the system specs including the PSU?
Most office PCs have less then 300 watt(some less then 200 watts) power supplies which limit what graphics card can be used without upgrading the power supply.
It was only a 300 watt power supply so i upgraded it to a 500 watt, its got the power hungry i7-2600 in it. I ended up getting it working just today so thanks for the reply!