Groovymame help

[Hoagtech]

Hi I cannot get my VGA crt to sync to my windows 10 pc.

I cannot get a picture even when using my DVI to Tenkdak VGA (RGBHV)

That being said I would like to output my games in doubled resolution through my OSSC in the chain going to my 31 khz monitor (no 15 khz).

DO I iether need a better DAC to feed into my VGA input of my OSSC or should I get another video card that outputs in 640x480?

Both my PCIe Slots are taken up by SLI so I was was hoping for an external solution or a DAC suggestion my older Monitor.

My PC is windows 10 SLI GTX 1080 i7

My monitor is a Mitsubishi Megaview XC3725C with supported resolutions of 640x480 to 1024x765

Any Ideas?

Currently my MAME looks like stretched out smeary garbage.

[Shelcoof]

Don't you need an ATI graphics card?

One reason why I avoided Groovymame was because I didn't have the proper graphics card on my laptop. And the one laptop that does have an ATI card isn't working properly.