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Groovy mame and Nvidia cards

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jimmy2x2x:
I know that Powerstrip support is preliminary, but I am finding it very odd atm.

Sometimes groovymame will work fine and select the requested refresh rate, othertimes it will always be 60hz for the same game.

This varies on each boot up, I cant seem to find anything that infulences it - it just seems random.

My desktop resolution is 1024x768 and I dont change any settings for this resolution within powerstrip.

I do change a couple of other resolutions (720x576 and 1280x1024) for 50hz commodore 64 / amiga emulation.

The commodore resolutions always work and sync fine at 50hz.

This is all running on windows xp x64 with a lot of services disabled, are there any services that should be enabled or any other suggestions?

EDIT: I noticed something strange to, if I change my monitor to vga (currently lcd) the game has large borders on all side but seems to sync at the correct rate

my mame.ini (no other .ini files are used) http://pastebin.com/TTBj1b2w


Thanks!

Calamity:
Yes, I highly doubt that the Powerstrip method will ever compare to what we get with ATI drivers, where we're used to an almost deterministic behaviour. I'm not even sure if it's a good idea to fully implement this because it will encourage people getting the wrong video cards.

The fuzziness lies in the method used by Powerstrip for programming the videocard dotclock. We can only request PS for a given dotclock, and PS will produce the closest possible stable dotclock.

Part of the problem is that the dotclock granularity can show huge variations along the videocard's operational range, so you can have a lot of options for low resolutions but just a few of them for higher resolutions. We can't know this at first hand, so we have a problem if we wan't to create new modelines in real time.

This varies a lot depending on the video card, so while I can get excellent results with this laptop for any desired resolution and refresh (GeForce Go 7400), things are not perfect in other systems I've tested.

Second (and worse), is the fact that results are not always consistent for some cards and situations. So I've seen that some modelines work today but not tomorrow, and my guess is that it has to do with dotclock stability.

As for your case, you may get better results lowering yout desktop resolution to something closer to the ones that the vga monitor setting is picking. Probably around that resolutions PS finds more stable dotclocks to choose from.

jimmy2x2x:
Thanks for the explanation, I was getting frustrated by the randomness being able to sync.

I think I will buy a 4890 for this PC and enjoy the ATI experience ;)

Before I do that I just wanted to make sure that I will be able to use Emu Driver resolutions PLUS these:

640x480 60hz
720x576 50hz
1024x768 75hz
1280x1024 50hz

Will I be able to ensure that I have those resolutions at those refresh rates somehow?

Thanks

Calamity:
Yes, you'll have those resolutions, either the native versions already built in the driver or custom versions of them calculated to your specs.

jimmy2x2x:
I thought so, just wanted to check before I buy

Thanks  :cheers:

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