4meg video card can do 1600x1200x16bit?!

[JEDI]

I'm playing around with an old computer on my 20" LCD.

Video card is a Trident 4meg video card. 1600 x 1200 x 16 = 31meg, thus needing a 32meg video card to do this?

How can a 4 meg video card do 1600x1200x16bit?

 

[ViRGE]

Uhh, it really shouldn't be able to.

1600x1200x2(that's 16 bits, we're working in bytes)x2(2 buffers, front and back)= just shy of 8MB. What you describe is impossible unless they're only single-buffering.

 

[Stumps]

what model is the trident?

 

[JEDI]

Originally posted by: Stumps
what model is the trident?

Trident 3D Image985

 

[Blurry]

Could it be that it's running at a lower hertz? Cuz I remembered my 3DLabs Promedia 4megger could do 1600x1200x16bit at 45hz

 

[Gamingphreek]

It may be using your AGP Aperture....or if it is PCI I believe it can still use the RAM as frame buffer.

-Kevin

 

[Stumps]

Originally posted by: JEDI

Originally posted by: Stumps
what model is the trident?

Trident 3D Image985

ewwww nasty...I thought you might of been using a Blade3D...hmmm not sure what is going on then

 

[VirtualLarry]

Windows' GDI isn't double-buffered, therefore should be no problem fitting 1600x1200x2 into 4MB.

 

[PingSpike]

I doubt this is why, but I remember one of my old trident PCI cards (served as the 2D to go with my Voodoo 1) had upgrade slots for additional ram on the card.

 

[xtknight]

1600 x 1200 x (16)

You are multipling by bits, you need to multiply by bytes (16/8=2) if you expect your answer in bytes.

 

[ViRGE]

Originally posted by: VirtualLarry
Windows' GDI isn't double-buffered, therefore should be no problem fitting 1600x1200x2 into 4MB.

That would seem to be the case, but are you sure about that? I could swear GDI+ was double-buffered.

 

[bigsnyder]

Try Powerstrip and see what it will let you do.

C Snyder

 

[Golgatha]

Originally posted by: xtknight
1600 x 1200 x (16)

You are multipling by bits, you need to multiply by bytes (16/8=2) if you expect your answer in bytes.

Yeah, I come up with just under 4MB for 1600x1200@16bit color.

 

[secretanchitman]

i have a voodoo3 16MB pci running at 1280x1024x32...yet it is choppy though.

right now, im on my old computer which has a p3 500Mhz, savage4 graphics (dxdiag wont tell me how much ram it has) and its at 1600x1200x32.

 

[Peter]

Four megabytes is (just so) enough for 1600x1200 in TrueColor. What limits older cards isn't the amount of RAM, but most of the time it's the maximum pixel clock they can drive - particularly in TrueColor.

For 1600x1200 at 60 Hz you'll need about 160 MHz pixel clock; old cards often can do about 230 at up to HighColor (16-bit), but only have that in TC. Try and you'll see.

As has been said in every single one of the kerbazillion "Does my card support this resolution" threads, just pop up the "List All Modes" window after unchecking "Hide Modes this monitor can't display".