HD4870 install problem

[graymo]

HI, can anyone help me ? i have a new asus pq5 mo.board with onboard graphics card, 650 w power with 2x pci e plugs, hd4870 1gb card, 4gb mem. .all new. installed vista, restarted, ok. installed mo.board cd, restarted, ok. installed ati driver, computer did not fully reboot .. boots to the windows loading logo with the then stops and reboots again and again. i can then only start in safe mode..... any ideas would be very helpful thanx

 

[c_schwab]

Double check all of your power connections.

 

[graymo]

Checked power connections ,there all ok. Do you think i have enough power ? how can i see how many watts the pci-e connectors are? (corsair tx650w power supply) thnx

 

[c_schwab]

Do you have the power cables plugged into the video card? The pci-e connection does not supply enough power for the 4870.

 

[graymo]

yes , 2x 6 pin connectors