Thread View: demon.tech.mac
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4 total messages
Started by Matthew Greenfield
Sat, 14 Mar 1998 00:00
VRAM requirements
Author: Matthew Greenfield
Date: Sat, 14 Mar 1998 00:00
Date: Sat, 14 Mar 1998 00:00
12 lines
704 bytes
704 bytes
Just a quickie: If I want a 'millions of colours' on a 17 inch monitor at 1024 x 768, 75Hz how much VRAM would I need. I'm thinking of a G3.... Thanks, Matthew. -- Matthew Greenfield matti@grnfield.u-net.com
Re: VRAM requirements
Author: Paul Durrant
Date: Sat, 14 Mar 1998 00:00
Date: Sat, 14 Mar 1998 00:00
13 lines
1107 bytes
1107 bytes
In article <1d5w6bs.1pn8oi1ya6e68N@grnfield.u-net.com>, matti@grnfield.u-net.com (Matthew Greenfield) wrote: > If I want a 'millions of colours' on a 17 inch monitor at 1024 x 768, > 75Hz how much VRAM would I need. I'm thinking of a G3.... Millions of colours is 24-bit colour, actually uses 32-bits per pixel on the Mac, so that's 4 bytes per pixel. 1024 is a nice round binary number, so each row of that monitor will take 4KB. 768 is 3/4 of 1024, so the whole screen will take 3MB of VRAM. Paul Durrant
Re: VRAM requirements
Author: Matthew Greenfield
Date: Sat, 14 Mar 1998 00:00
Date: Sat, 14 Mar 1998 00:00
24 lines
1336 bytes
1336 bytes
Paul Durrant <pdurrant@durrant.demon.co.uk> wrote: > In article <1d5w6bs.1pn8oi1ya6e68N@grnfield.u-net.com>, > matti@grnfield.u-net.com (Matthew Greenfield) wrote: > > > If I want a 'millions of colours' on a 17 inch monitor at 1024 x 768, > > 75Hz how much VRAM would I need. I'm thinking of a G3.... > > Millions of colours is 24-bit colour, actually uses 32-bits per pixel on > the Mac, so that's 4 bytes per pixel. 1024 is a nice round binary number, > so each row of that monitor will take 4KB. 768 is 3/4 of 1024, so the whole > screen will take 3MB of VRAM. > > Paul Durrant The G3's come with 2mb from what I've read, so if I buy two more that should be OK. Thanks alot, Matti. -- Matthew Greenfield matti@grnfield.u-net.com
Re: VRAM requirements
Author: Rebecca and Rowland
Date: Sun, 15 Mar 1998 00:00
Date: Sun, 15 Mar 1998 00:00
21 lines
1199 bytes
1199 bytes
Matthew Greenfield <matti@grnfield.u-net.com> wrote:
> Just a quickie:
>
> If I want a 'millions of colours' on a 17 inch monitor at 1024 x 768,
> 75Hz how much VRAM would I need. I'm thinking of a G3....
1024x768 = 786,432 pixels
Millions of colours need 3 bytes/pixel (24 bit colour), so you need:
768432 x 3 = 2,359,296 bits = 2.25 MBytes
Rowland.
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