Epson 8100 Projector and ATI Radeon 5670 - Overscan? - AVS Forum
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post #1 of 8 Old 02-18-2012, 07:56 AM - Thread Starter
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hi guys, i just purchased my Epson 8100 to run with my HTPC which is running an ATI 5670 video card. i selected output resolution of 1920x1080 but the image Windows 7 image on the screen is about 20-30 smaller then the projector image (using projector test pattern).

is this an overscan/underscan issue? how do i adjust this using the ATI settings? i assume there are settings to correct this?

thanks much!
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post #2 of 8 Old 02-18-2012, 09:25 AM
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Scaling option inside ATIs CCC - usually comes set around 10-15%, the slider should be set to 0.
Found when you look under "advanced options"
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post #3 of 8 Old 02-18-2012, 09:39 AM - Thread Starter
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thanks. would this affect my 1:1 pixel mapping? i mean would it degrade image quality?
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post #4 of 8 Old 02-18-2012, 01:30 PM
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yup-
also make sure that overscanning is turned off on your epson. You might check in the manual for PC connections to see if you need to use a particular input/name it properly/change a setting to get it turned off.
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post #5 of 8 Old 02-18-2012, 03:13 PM - Thread Starter
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ahh....there's nothing in the manual of the epson 8100 that would adjust for overscan.

looks like i need to use zoom and deal with overscan rather than scaling. thanks
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post #6 of 8 Old 02-19-2012, 04:58 PM
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NO... no ZOOM on the epson, this is a common misconception about overscan. Many folks use a TV for watching video devices and never realize the device is sending a ZOOMed image to compensate for the TV doing overscan. They never see the edges of the program - they're off the screen! In your case it's opposite. You want a computer to send 1:1 to the display and you should! I do on my Epson 8350 just fine. As the guy said, adjust the ATi video settings to ZERO overscan and you'll be fine! No zooming on the Epson what-so-ever!

Let us know...
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post #7 of 8 Old 02-19-2012, 07:35 PM
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ahh, I see where the misunderstanding came in.
My "yup" means that you need to adjust your ATI to 0 overscan (as Andrew pointed out) - your image quality is degraded now, not when you get the settings dialed in properly.
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post #8 of 8 Old 02-20-2012, 07:39 AM - Thread Starter
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ah. thanks for clarifying guys. i did used the ATI scaling option to fill my screen. It works great.
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