RAMDAC overclocking

[CAM]

I overclocked my G400 up to 360Mhz(RAMDAC). Dangerous yes or no

sorry for my bad english, because i´m from germany )

Here is something about my Computer
PIII600EB
Gigabyte Bx2000
G400 32MB (201/150.75)
128MB 133Mhz 6ns
HDD 13GB
3DMark2000 Score: only 3145

[Scout255]

how did you manage to do this?

[gbm]

Not dangerous. What monitor do you use for 2048x1536 at 85 Hz?

[This message has been edited by gbm (edited 07 August 2000).]

[DataOrb]

gotta ask it to,
HOW did you do it and WHY?

------------------

"Excuse me for butting in, but I'm interrupt-driven..."
__________________________________________________ ____
Worstation Specs:
Asus P3B-F w/Celeron@680mhz
160mb PC100 7ns RAM.
Matrox G400 142/190Mhz.
IBM 75GXP 7200RPM 15Gb.
Seagate U8 4.1gb Hdd,
SBlaster Live! Digital.
17" Mag InnoVision 770Ti TrinitronFR Monitor @1152X864
Logitech MouseMan Wheel USB (on Everglide Giganta SE)
Focus 127keys MM Keyboard.
HP SCSI Cd-Rw 7200Si
AOpen X48 CD ROM.
AOpen 1040Pro Slot DVD
3Com NIc @ Tevel/3Com Cable Modem
Modded case, the "banshee". 6 fans.
3Com Palm IIIx + GoType + AxxPAC

[Greebe]

D'ORB, first off go here http://grafi.ii.pw.edu.pl/gbm/matrox/

and why... well so you don't have extreme flicker at those resolutions

[DataOrb]

Thanks, so do you actually plan to use a high res then 1600X1200? and a high refresh rate then 100hz?
on WHAT monitor?

------------------

"Excuse me for butting in, but I'm interrupt-driven..."
__________________________________________________ ____
Worstation Specs:
Asus P3B-F w/Celeron@680mhz
160mb PC100 7ns RAM.
Matrox G400 142/190Mhz.
IBM 75GXP 7200RPM 15Gb.
Seagate U8 4.1gb Hdd,
SBlaster Live! Digital.
17" Mag InnoVision 770Ti TrinitronFR Monitor @1152X864
Logitech MouseMan Wheel USB (on Everglide Giganta SE)
Focus 127keys MM Keyboard.
HP SCSI Cd-Rw 7200Si
AOpen X48 CD ROM.
AOpen 1040Pro Slot DVD
3Com NIc @ Tevel/3Com Cable Modem
Modded case, the "banshee". 6 fans.
3Com Palm IIIx + GoType + AxxPAC

[Maggi]

Hey Greg ... I doubt he's using that res ...

Back to your question, CAM.

It can be dangerous when you really use it that high.
This means you run it for example when using the resolution and refresh rate that Greg (gbm) asked for, but you'd need a very highend class monitor for that and under normal circumstances, you won't even reach 300MHz RAMDAC.

Cheers,
Maggi

[mengmore]

So,if I jsut use 1600*1200*85Hz on IBM P96,
it's useless to overclocker the ramdac?
I come from Taiwan,
and find that most ramdac overclocker articles don't mention about BIOS later than 1.6.
I don't how to update it.

[mengmore]

What I am interested is about the clarity under high resolution.
I use G400 32MB SGRAM SH(OC 147/196) and IBM P96(1600*1200*85Hz,32),
Will the pixel be "sharper" after RAMDAC overclockered¡H

according to an article in http://grafi.ii.pw.edu.pl/gbm/matrox/

230 vs. 250 MHz RAMDAC affair
(deleted)
Also, the analog output of higher-frequency RAMDAC may produce slightly "sharper" pixels, but again this is noticeable only in highest resolutions.

[Greebe]

NO, using a higher speed ramdac does not help visual quality and could possibly lower it a tad. But we all know <g> the quatilty M puts into their ramdac's and that won't reduce qualtiy.

The bottom line is, there won't be any change and would prove unneccessary unless you need that bandwidth to run higher resolutions.

[Alec]

Matrox´s RAMDAC is known for its quality. If you´ve got 300Mhz of high quality RAMDAC (a G400), you´re done.

Look at this (Nvidia´s RAMDAC):
http://www.geocities.com/porotuner/

[mengmore]

Thanks for your answers.

according to the URL,
When the resolution is 1000*1200*85Hz,
nVidia Geforce's RAMDAC is up to 330Hz while Matrox G400's RAMDAC is only up to 230.
Does it mean that Matrox's RAMDAC is better?

[Ashley]

1. all G400 chips are the same
2. the G400 has an integrated RAMDAC
3. the G400 MAX card is rated at 360MHz max.
4. therefore, *all* G400s max out at 360MHz

[Alec]

Yes.

[gbm]

When you output image at 1600x1200, 85 Hz, your RAMDAC works at 230 MHz. Any RAMDAC. Every RAMDAC. Matrox/nVidia/3Dfx/S3/whatever RAMDAC. Clear?

Matrox RAMDACs tend to be better than competition.