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Author Topic: 1024x768 x 24 not possible on Cybervision64 ?!  (Read 3429 times)

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Offline zipper

Re: 1024x768 x 24 not possible on Cybervision64 ?!
« on: January 14, 2006, 04:23:11 PM »
Quote

patrik wrote:
 This what is supposed to be max pixelclock for each bit-depth:

8-bit - 130MHz max
16-bit - 80MHz max
24-bit - 50MHz max


..and I would have sworn that cv64, cv64/3D and PIV all were capable for about 135MHz/85 MHz/85 MHz - or was cv64 les capable than the others? Sorry that "Amiga Graphics Boards" site has since long been disappeared.
 

Offline zipper

Re: 1024x768 x 24 not possible on Cybervision64 ?!
« Reply #1 on: January 14, 2006, 05:35:51 PM »
Quote

patrik wrote:
At 16-bit though, I am certain the max is 80MHz, unless you remove the limits in CGXMode (cant remember the tooltype for that), which will allow to go to 110MHz or something I think, but using a higher pixelclock than 80MHz will drop the cards performance quickly as it will start to cut significantly from the bandwidth supposed to be over for the Trio64 chip and Amiga cpu to draw into the vram.


In P96 is a tooltype overclock, which allows 10 MHz overclocking and the default is 85 so you can try 95 on 16bit.
CGX4 has some tooltype which is spelled backwards and tells something about adding cooling to your Permedia -can't remember the exact phrase.
I used just 16bit until CVPPC as 24bit was so hopelessly slow with older cards (except when looking pics required more colours), so the clocks used have slipped from my memory.