SUMMARY: SPARC frame buffers

From: Conner McCleod (
Date: Fri Nov 19 1999 - 16:54:56 CST

Thanks for all the replies. I am going to keep the CG6 on one of the
workstations and put the CG3 on the a production server.

Thanks to:

David Evans" <
You are correct about the cards and more details can be found on
the Frame Buffer FAQ at under Sys Admin
Resources. (Kevin Sheehan
cgthree and cgsix are both color, but the cgsix (aka GX) has an
acceleratorv and the cgthree is just dumb memory.

Ray buckley <>
I would leave the cg3 on the server, depending on the part
number on the cg6 you can get 1280 X 1024 screen resolution whereas the cg3
will only give you 1152 X 900.

"Rahilly, Simon" <>
>From the Sun Frame Buffer FAQ:

When this document talks about the cgthree it refers to an
un-accelerated 8 bit SBus frame buffer. It is recognisable by a row of 8 SIL
chips (Single In Line) which provide the Video memory and look rather like a
heatsink. The cgthree was built onto the motherboard of some entry level

501-1415 - cgthree with 13W3 connector
501-1718 - cgthree with 13W3 connector. Distinguishable from
501-1415 by having 2 crystals (metal oblongs) instead of 1.

Sometimes known as LEGO for Low End Graphics Option, the cgsix
family includes the GX, GX+, TGX and TGX+ boards. These are accelerated 2D 8
bit frame buffers. They are the reference point for graphics support, and
are supported in all Sparc machines, subject to some restrictions on size
and revision; for example the older GX/GX+ cards are not supported in the
newest Ultra hardware. For information on identifying the cgsix from
software, see elsewhere or use fbinfo.

501-1481 - Double width GX: Rev 1
501-1645 - Double width GX: Rev 2
501-1672 - Single width GX: Rev 8
501-1996 - Single width GX
501-2325 - TGX - Older model. Chip sometimes printed with Sun
logo and TURBO XGX.
501-2922 - TGX - Newer model. New names (mixed case).
501-2253 - TGX Plus. Older model. Same chip and names as TGX
501-2955 - TGX Plus. Newer model.

Given the choice, I'd go for the cgsix (whatever variant), as
its accelerated

"Matthew Stier" <>
The CG6 will have the better performance characteristics; if the
applications take advantage of them.

From: Val <>
Have you checked your cable? "No, but I am going to change it to see if I
get better colors out of the old monitor."

Wimmer Jeffrey <>
A CG6 is a much better card than a CG3...however, I think
they're still both 8 bit color cards....

Adrian Stovall <>
the cg6 is the newer/better of the two.

Dave Floyd <>
You are correct in your supposition. The cgsix is the better card.
There are many revisions of cgsix; GX, GX+, turboGX, turboGX+ etc.... They
all have different resolution posiibilities, but they are all accelerated
and contain different levels of on board buffering, and will all outperform
the cgthree dumb frame buffer.

"Brion Leary" <>
Yes, cgsix is better than cgthree.
You can get more info at

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