OverClocking G400 32 DH???

[Men'Ace]

Howfar can I "safely" boost my Millenium G400 32 DH (not a Max)

I'm going to use powerstrip and want to know 'till what point I can set my Engine and Memory clock..
I have no extra cooling on the G400 directly, but have two extra fans in my case...

Anyone with experience in this area please respond...

[Greebe]

Most G400 vannilas do Max speeds... try setting to 150/200 and test... if it passes try upping it another notch and retest til it starts messing up and then back it down.

[Kastuvas]

I can get mine up to 156/208 but i have a fan on it, to keep it

I use MGATweak though for some reason Powerstrip doesnt overclock at all.

[Ali]

Mine did 166/214 with a fan, or 150/200 pasive.

I would guess that 80% will do 150/200 safely, and you are lucky if you get much higher.

[Clevor]

Are you guys just putting one of those video card coolers that blows a fan over the card, or replacing the OEM heatsink?

I am a veteran of overclocking Geforces and Voodoo5s, so I am chomping at the bit to put Socket 370 heatsinks and fans on the G400 32 DH and G400 MAX I got, but that will void the warrantee, which is still good for another year.

You could try mounting a fan on the OEM heatsink of the G400 DH, but Matrox will see the screw threads.

[cerb]

My vanilla 32Mb G400 DH will only go as high as about 180mhz memory. Any higher and I get corruption/lockups.

Mine is only 6ns ram, though, which means it should really only do 166Mhz. I'd imagine the guys getting 200mhz+ out of theirs probably were lucky and got the same 5.5ns ram as the MAX.

My core will go to about 160Mhz or more (I have an old Socket 7 fan mounted on the stock heatsink), but there's no point to that because the memory still limits it.

At the fastest speed I could safely get the memory to I got 11% better performance at 1024x768 in Quake 3. It didn't make any difference at 640x480 (ie my processor - athlon 700 - was the limiting factor)

oh, that's right, I also have an 80mm sunon high speed fan hung so that it blows straight over my g400, so it's got pretty decent cooling. Be nice to get some ramsinks, tho.

[Kastuvas]

Cerb how do you make your core 160 Mhz when you say you cant overclock your memory more then 180 MHz. As far as i know the core and the memory on matrox cards is relational therefore when you overklock you overclock both the core and the memory.

[dZeus]

with mga tweak you can change the PLL/Memory/Core clock ratios/multipliers (not that you really want to do that, as the default setting is a very well-chosen compromise between fillrate and memory bandwidth

[cerb]

Yeah - what he said.