It’s an AMD APU I believe it was a 6550D, and I’ve turned of everything that could slow it down, vsync, tearfree, Catalyst AI you name it. Even windowed the performance of the standalone is worse than the same blendfile close to fullscreen on a fullhd display inside the blender viewport. Thing is if it was the driver, why does it only affect the standalone player? (It’s also not a problem with the catalyst driver, because the opensource radeon with mesa has the same issue) As I said the only way I can get it equally slow while inside Blender is when I turn off VBO, but I don’t have any options with the standalone player for turning it on or off.
BTW I’ve tested the VBO settings on my more powerful desktop pc with an NVIDIA 560Ti and turning off VBO there has no impact on performance as far as I can tell. Which also means I can’t tell if the standalone player has it disabled or enabled with a powerful gpu. To my untrained eye it seems that VBO affects the weaker GPU more than it does GPU’s with power to spare.
Could it be the gpu runs out of memory just when I set it to fullscreen at 1920x1080, while the thin border in the blender-viewport keeps it just below the VRAM-limit?
Couldn’t resist and did another couple of tests and fiddling about with driver-settings and reboots and now the low fps framerate and full-load rasterizer only occur when running the standalone player fullscreen. I can run the standalone player windowed with a larger resolution than 1920x1080 at 60 fps with the rasterizer at 4-5%. I also tried dragging out both the standalone and the blender-viewport beyond the limits of my desktop resolution and I can drag out both windows quite a bit, before framerates start to drop below 60fps. Now I’m really stumped, but at least I know running windowed at full resolution is a possibilty.
Still would be nice to know why running fullscreen at a lower resolution, is causing a drop in framerate. Anyways thank you everyone for the quick responses. Don’t know if I should mark this one solved or rename the title to “Performance issues with blenderplayer at fullscreen”.