Powermac 1.25 MDD one or two graphics cards for dual display?

I currently have two displays running off of one ATI card. Would I be better off putting a second card in a free PCI slot to run display number two. I've noticed that the ATI card divides the 128 MB memory between the two displays. With a second card there would be more memory dedicated to each individual display.
Is this worth it or not? I have the extra card which i believe is an ATA 9200 PCI card.
Graphics/Displays:
ATI Radeon 9000 Pro:
Chipset Model: ATY,RV250
Type: Display
Bus: AGP
Slot: SLOT-1
VRAM (Total): 128 MB
Vendor: ATI (0x1002)
Device ID: 0x4966
Revision ID: 0x0001
ROM Revision: 113-99703-135
Displays:
Apple Studio Display:
Display Type: LCD
Resolution: 1280 x 1024
Depth: 32-bit Color
Core Image: Not Supported
Main Display: Yes
Mirror: Off
Online: Yes
Quartz Extreme: Supported
CPD-200GS:
Resolution: 1280 x 1024 @ 75 Hz
Depth: 32-bit Color
Core Image: Not Supported
Mirror: Off
Online: Yes
Quartz Extreme: Supported

on my mac I have a nVidia Geforce4 Ti 4600 128MB DDR 4x AGP.
it has a dvi port and adc port.
I have a 19" Samsung 900DF CRT connected to a DVI to VGA adpater that came with my G4 MDD.
I also have a 17" Philips 107S CRT connected to an ADC to VGA adapter, that I bought for $28 from OWC.
works great for me. extended desktop. I have photoshop menus and palettes on the smaller monitor and the main work screen on the larger.
when i watch movies and stuff watch the movies on the larger monitor.
when I use iMovie and After Effects, I do same as I do with Photoshop.
If I wanted to, I could put a PCI graphics card in the next slot over from the AGP and run another monitor.
that ATI Radeon 9200 PCI looks good... about $130 from OWC.
but what I got works fine...

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Powermac 1.25 MDD one or two graphics cards for dual display?

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