I have had DK and pretty much every game run at as far as I can tell full speed... (FS 0) but somehow now it wont work anymore... I always had some corruption at the (rareware or whatever it was) intro screen... and castlevania's layers were messed up... but now everything is running...
I am getting around 25-35 FPS with red alert on 250 Mhz interlace 0
its awesome to be able to play red alert on my gp2x now :) I will test some more stuff later today and let you all know how it goes... but for now.. RA!!
anyway.. it runs juuuuuust fine, a bit slow.. and take my advice...