I'm just wondering if anyone else have had this issue. I have a CV64/3D that's been working perfectly for years in my A1200 ZIV busboard but today I moved it to my A4000 (for those sweet ZIII-speeds) but I get these strange graphical glitches in >800x600 resolutions (800x600 and below are perfect). The picture looks fine when everything is still but as soon as I start moving things around I get these odd flashes with graphical garbage made up of stuff that's on screen. It remains as long as I'm moving a window or resizing. NOT when moving the mouse or the picture is still.
I've tried reducing clockrate but it does not appear to make a difference. I don't have other RTG cards to test, but there is no other indications that I have a problem with the busboard or motherboard. Both were recently overhauled and recapped and has been working perfectly. Only my CV64/3D is glitching.