Changing G400 DualHead to G400 MAX through pins

[TreyPocca]

Been following the discussion and been playing with my G400 SH and now I have some questions?


1# I've tried a 20 mm and a 70 mm fan on top the grill but get the same result?? Cannot OC past 114 % i Matrox Tweak V4.04. Without the extra fan I can OC to 112 %. Do I need to remove the grill and attach the fan directly on the core?

2# My Windows doesn't seem to notice the OC'ed Ramdac. It keeps reading 300 Mhz in the control panel. Is there another program that can read the actual Ramdac speed?? (Thought the Tweak utility could).


Best of luck OC'ing

[gbm]

Ok, i'll yelL, as speaking doesn't help.

THE ACTUAL RAMDAC SPEED DEPENDS ON YOUR SCREEN RESOLUTION. WITH 85 Hz SCREEN REFRESH, FOR 1024X768 IT'S AROUND 85 MHz, FOR 1600X1200 - ABOUT 230 MHz.

THE 300 OR 360 MHz VALUE IS JUST THE SPEED LIMIT OF RAMDAC. TO REACH 360 MHz YOU NEED TO RUN 2048X1536 @ 85Hz.

CHANGING THE RAMDAC MAX FREQ
DOES NOT NOT NOT
CHANGE ANYTHING FOR NORMAL USE (BELOW 2048X1536).

[Greebe]

hehe

[alexudal]

G400(Maxed) pins

Together with raising RAMDAC to 360 MHz, and overall OC'ing my DH SGRAM G400, I need to raise its "2048x1536" limit to something like "2560x1920" (I have my CRT perfectly capable of that, but it's another story). What PIN(s) do I need to change into what?

BTW, has anyone, ever, tried to get more than 2048x1536 on a single head with Parhelia? I'm worried about how fast/slow redrawing of that quite a bunch of pixels might be.

Thanx,
AU
SJ CA

[TreyPocca]

Guess my last tread shows that my knowledge about Ramdac is limited to some extend and the G400.

But can some one tell me where to get a reading of the Core and memory frequency?