ok, I got my new 6800GT card (moded to Nvidia Quadro) and it's a HUGE difference on how Dosbox works on this card compared to the old Ati Rage 2 card. On the Ati card, the processor was 50% (100% on one core), and I had to skip frames in order to play. On the new card, DOSBox eats only around 5% ... …

Yes..a strange thing is that by default with the Ati Rage 2, when starting Dos Box it stays at 50% processor ussage...(I mean it stays 100% on a single core), even when it's doing nothing (just command prompt). Then to be able to play a game or something, I have to make DosBox frameskip 1 or 2... …

yes I know, is an oldy PCI 2MB Ati Rage 2 card running on my dual core Amd 4800+ ....the main video card died on me last week so I had to put something before the replacement comes 😀

no, my monitor can take up to 140 at 1024x768, is not about that. The problem is with some old Ati Rage cards, I think they don't do well with 100hz and 32bit color depth, I changed it to 85hz and 24bit or 16 bit and now it works well. the change can be made in control panel->display proprieties-> …

For anybody who gets a "failed to create a rendering output" when they try to play a game or open dos box, try to change the screen resolution and refresh rate..it worked for me. This error is related to old Ati Cards (Rage for example), it seems that high refresh rates (100, 120 ) don't go with Dos …