My xbox360 looks better than my ps3 even with hdmi cable do i need a better cable?

Multi-platform games look better on the 360, because developers have been using the 360s platform and then porting to the ps3. The only real difference is color saturation, and the amount of pixels shown at once (only in some games). But again, this is because they were ported to the ps3, not because the ps3 is inferior. Try comparing a PS3 exclusive with a 360 exclusive, that's the true test. Games like Uncharted 2 look better than any 360 exclusive. Up until now, developers have used the 360 to create multi-platform games out of convenience, but they've reached their limit with it. The ps3 is a more complicated platform to develop games on, but it has much more potential. Any real advances in video games in the next few years will be coming from Sony, and the 360 will slowly fade into the background..

If the PS3 is not set up correctly, then it is possible for the 360 to look better than the PS3. When the PS3 is set up correctly, the same game on a 360 and PS3 will look exactly the same. The easiest way to set up the PS3 is to do a Video Reset, which will give you the best settings for the PS3. How to do a Video Reset: With the PS3 in stand by mode (red light on front of the PS3), hold the power button down until you hear two beeps (about 5 seconds). The PS3 will turn on and automatically reset giving you the best settings for the type of TV and cable being used. Always do a Video Reset when you change TVs and/or cables to get the best settings for the PS3.