Fixed Frequency Video Card for older Mac or PC?

My problem:

I have a first gen G3 beige Mac Tower and a vintage Radius 21 inch monitor
(GDM-1950) that was one of the few monitors that displays a fixed frequency
of 1152x882 @ 72hz/65kHz. Both items are almost new having been stored for
decades and work perfectly on their own and I basically got them for free.
However, the monitor won't display properly using the Mac video card
(rolling, jumbled image) and I'm sure it has to do with the kind of
specialized video card I need.

Anyone know of a manufacturer who produces a card that will work preferably
for the old G3 Mac but I'll settle for a pc style card if I can use this
beast for my pc. I've done some research on the web and found "Mirage" seems
to make several cards that might work, however their reseller,
"DisplaySonic" doesn't answer their phone or respond to emails.

I'd hate to just trash this setup.

T.B.

TB wrote:

I have a first gen G3 beige Mac Tower and a vintage Radius 21 inch
monitor (GDM-1950) that was one of the few monitors that displays a
fixed frequency of 1152x882 @ 72hz/65kHz. Both items are almost new
having been stored for decades and work perfectly on their own and I
basically got them for free. However, the monitor won't display
properly using the Mac video card (rolling, jumbled image) and I'm
sure it has to do with the kind of specialized video card I need.

Anyone know of a manufacturer who produces a card that will work
preferably for the old G3 Mac but I'll settle for a pc style card if
I can use this beast for my pc. I've done some research on the web
and found "Mirage" seems to make several cards that might work,
however their reseller, "DisplaySonic" doesn't answer their phone or
respond to emails.

Forget Mirage, their cards are crap. The GDM-1950 works with every
generic PC and Mac video card, as long as it outputs a
resolution/frequency combination the monitor accepts. The GDM-1950 is
made for 1280x1024@60Hz but should also run fine at 1162x864@72Hz. Both
resolutions/refresh rates can be provided by every somewhat modern video
card...

I'd hate to just trash this setup.

I hated the GDM-1950 already when it was a current model...

Benjamin