Best way to overclock Crossfire X1900 setup

[kevpuk]

Having had a relatively successful OC on my original Sapphire X1900XT 512MB (nicely beyond XT-X speeds, to around 685/790 ), I now have the pleasure of an ASUS X1900XT Master card plugged in too.

Thing is, not much success (read: None to date ) on overclocking the Crossfire setup - where should I start ? To be honest, I only ever used the CCC Overdrive to OC the Sapphire card, but have ATi Tool installed.....thing is that CCC does not show the 2 cards separately and the Overdrive section only shows min/max options as the same (i.e. the sliders cannot be changed )

Please, please, please......anyone able to point me in the right direction ?

[pmanington]

You want to overclock a crossfire setup!?

Dare I ask why? I mean, surely that allows you to have everything turned on as it is.

[kevpuk]

Well.....more for the sake of experimentation that anything purely rational.....but - that said - with Oblivion running @ 1680x1050 with HDR and AA (nice one, ATI ), there is still room for improvement......

[chuckskull]

http://forums.guru3d.com/showthread.php?threadid=181125 Have a look in the second post has decent instructions.

[kevpuk]

Nice one, thanks - however, looks like I have a problem as my CCC does not allow any overclocking with both cards in place.....the slider shows 621MHz - 621MHz as the range for the core........Boooo !.....something is not right !

[chuckskull]

Nice one, thanks - however, looks like I have a problem as my CCC does not allow any overclocking with both cards in place.....the slider shows 621MHz - 621MHz as the range for the core........Boooo !.....something is not right !

No idea on that one, I haven't used an ati card since my 9600, try posting in that thread.