Want to Crossfire 2 x HD 4870's ... need feedback

[yamawho]

Thinking about doing this again and I'm looking for feedback ...

Mobo is an Asus P5K Pro which has a P45 chipset so it supports 2 x 8x slots.
CPU is a E8500 with 4GB ram running windows 7 ult 64bit.
I am upgrading the psu to a Corsair 750watt and I hav ethe 2nd HD 4870.

Info on the web can be out of date and there is also crossfire profiles ...

From what I understand, I jusr install the 2nd card, bootup and enable crossfire in the driver?

Does one card need to be flashed as a master still?

I assume I should already have the video driver installed using one card ... is there a CAT version that would be best?

Which card to I plug the monitor into ... the bottom one?

How do the profiles work?

Is this more trouble than it's worth?

[Dr_BenD_over]

The K's are actually P35 based but that board does support x8/x8

Just put the second card in, boot up, install drivers, do a reboot for good measure. It should detect the card and enable CF. A master card hasn't been a requirement since the x1950.

Single monitor should go to the top card, if your running multiple monitors, you might have some fun in trying to get CF to work with more than one monitor enabled.

[yamawho]

It's a P5Q Pro actually ...

Using only one monitor on DVI.

So clean CAT install is required eh ... OK.

What about crossfire profiles ...

[Dr_BenD_over]

They didn't have them when I last ran CF.

[Whilhelm]

I ran two 4870s for quite some time and had very few issues with driver installs and performance. You can grab the latest catalyst application profiles from AMDs website, personally I haven't seen much improvement with them installed. You should have no issues driving two displays as long as they are both plugged into the primary card.