Asus a7v, elsa erazor geforce256 & lg studioworks...

In article <Anrk5.6637$AM>,
"arto heikkila" <> wrote:

I have the SAME ghosting problem with my LG Studioworks 995E and
Visiontek GeForce DDR. I RMA'd my 995E last week because not only was
it ghosting with my GeForce, it also had terrible, 1/2" halos around
everything in high-contrast situations. I should be getting my new 995E
this week. On Thursday, I'm also going to test my GeForce with my
friend's Samsung 19" to see if the card has problems with that monitor
too...Like you, I have tested my monitor with a 3dfx card (Voodoo
Banshee PCI) and there was no ghosting. Hopefully, the new monitor will
solve the problems...If not, and my video card exhibits no ghosting
with my friend's Samsung, I'll have to Ebay the 995E and buy the
Samsung.

Does anyone have a DDR GeForce and LG Studioworks 995 setup that
doesn't exhibit ghosting?

Sent via Deja.com #
Before you buy.

So, what do you suggest I should do? Change the monitor or graphic board?

Do you have the source of that testing, because I
really would like to see it? If not, do you
happen to remember which GeForce 2 offered the
best 2D image quality (signal)?

/| .oo__. A -= Lost Dragon =- U
{ \| ,-'' L |_O_|==- -= Forever Dead Forgotten Lie =- -==|_O_| D
`,_/'(_)\_ I | | |==- Remembered Souls, They Cannot Die -==| | | I
<...{_)_)_'' D `---` # '---' C

<34ck5.6611$AM>...
RAMDAC).

I am slightly suprised that the Voodoo3, had a 350MHz RAMDAC. Most are
older, and don't go to this rate.

A pity. The higher frequency units generally have the BNC connectors
as well, since it allows better cables to be used, and gives less
problems at these frequencies.

A 'bulge' at the end of the cable near the plug. The seperate ring, is
usually available from some commercial electronics suppliers, and
comprises two 'U' shapes of ferrite, that can be clamped around the
video cable with a tie-wrap. Some video cards come with two of these
and the wrap as part of a 'kit' to reduce this problem.

Best Wishes

ok, geforce 256 card has the same RAMDAC value as voodoo3 (350 RAMDAC).

nope, monitor has only solid d type input.

monitor supports 85Hz at 1280*1024 or 100 Hz at 1024*768 and i have checked
the refresh rates. the shadow gets smaller at low refresh rates (disappears
at 640*480). but at 85 Hz...

???

...

The 'shadow', is the result of the sharp 'edge' on the video signal,
causing ringing in t the video cable between the card and the monitor.
This used to be a very common problem with Matrox cards, back in the
days when they were offering RAMDACs, that were noticeably faster than
their competitors.
The reason that one card is doing it, and not the other, is that the
TNT2, probably has a somewhat faster RAMDAC, than the Voodoo3.
There are a series of possible solutions:
The first is that if the cable to the monitor is seperate, it may be
necessary to get a better cable. The characteristic impedance of the
cable, is critical at these frequencies.
If the monitor has two inputs (some have a D type input, and also
seperate RGB inputs), then use the latter. These usually have a higher
bandwidth than the D type connectors.
It may be that the TNT2, is actually using a higher bandwidth signal
than the Voodoo. For instance if the monitor 'on paper' supports 85Hz
at 1280*1024, the Voodoo, may well only be driving it at 70Hz, while
the TNT2, tries to drive the monitor 'flat out'. This increase in dot
clock rate, will make the problem worse. Look at the refresh rate
'tab' in the display properties, and if this is happening, try turning
the rate down (though you want at least 75Hz for 'comfort'...
It may be worth trying a ferrite 'ring' round the video cable close to
the card. This serves to slightly attenuate the high frequency signals
and reduce the problem (many cables have this built in).
The final problem (which is not one that you can do much about), is
that the impedance of either the card, or the monitor, may be at the
extreme 'end' of the proper range. There are three figures that
actually matter. The termination at the card, in the monitor, and the
impedance of the cable. All should be close to the same figure
(50ohm). The larger the error between these, the worse the ringing
will become.

Best Wishes

there are a couple reasons for shadows:
- your signal is too good -> fix:dont use a bnc-cable
- your signal is too bad -> use a bnc cable
- your cable or monitor is in a magnetic-field from a different device
(speakers, etc.)

this behavior has nothing to do with drivers, its all the 2d-signal-quality
from the hardware.

good luck, i had this problem and i know its terrible.
btw. elsa - cards were testet in the german magazin c't and they found out
that their 2d-signal isnt the best.

"arto heikkila" <> schrieb im Newsbeitrag
...

Elsa Erazor X2, A7V, TB800 running at 950, no problems.
Not much help but good to know.
What monitor do you use ?
Did it come with it's own .ini ?
What (exact) monitor name is written in your Device manager ?

Bob

On Wed, 09 Aug 2000 09:33:18 GMT, "arto heikkila"