Windows 7: Brand new to Overclocking :)

HDMI

whenever I use HDMI cable, my screen keep losing colours, so have to stick with vga cable and can't go over 1360x768

i've tried 3 different HDMI cables but same problem. I also use same monitor with ps3 and it works absolutely fine. any suggestions to solve this?

Can you be more clearer about losing colour please? What happens?

it goes like overlay of green colour, but you can stil see the desktop, its kinda hard to explain i tried taking screenshot but when it goes back clear, screenshot is clear as well

Try a new cable, or failing that a different monitor. Sounds like a bad port/cable.

~Lordbob

I've tried 3 different HDMI cables. I'm using Sony 32" EX301 as monitor and it works fine with my ps3 and sky hd box. Both are connected with HDMI cables. No problem at all.

Also its hard to believe that ports on both cards are bad

It could be a bad port on the graphics card.

~Lordbob

its hard to believe that ports on both cards are bad?

It has to be something else. I'm not saying you don't know this, but to be clear, HDMI is the smaller cable.
Look at this site, we aren't playing you, it is the best, and it has a picture of what it looks like: CNET Quick Guide: HDMI and HDMI cables: What is HDMI? - CNET Reviews
You bought your cards brand new? Perhaps it IS 3 bad cables, where did they come from? Your monitor supports Windows 7 and HDMI?

Failing all that, perhaps you just need to edit your display's settings. Edit the monitor settings itself to see if you can clear it up, edit the control panel settings dealing with your graphics card (Mine is Nvidia Control Panel, for example) to optimal levels, and double check color and display settings in windows control panel.

*EDIT* You know, perhaps it is the monitor just not working with the HDMI. Buy a new one and it may solve your problems. If you don't want to upgrade that, test someone you know who has an HDMI monitor and see if it is indeed your monitor

Are there special drivers for the HDMI portion?

Also, HDMI setting may need to be calibrated in your Graphics Control Panel.