RS2 (RTW in general) and crossfire

[Skoran]

I bought a brand new pc a couple of months ago.

Everything runs super smooth but for some reason RS2 has very low fps. When I play the normal RTW I have the same problem.
I find no other reason that causes this besides have 2 graphic cards in crossfire.

My system:

GIGA-BYTE GA-890GPA-UD3H
AMD Phenom II Quad 955
2 x GIGA-BYTE RADEON HD5770, 1024 mb (in crossfire)
4 gb of ram

When I play a large battle I get an average of 13 fps or so. I tried turning off crossfire but my fps is still very low. Which I find odd cause one graphic card on his own would be powerfull enough to run RTW decently.

Are their any tricks to solve this?

[Brusilov]

The game dates from 2004 so it doens't even know what dual core is let alone Quad Core. Also although your graphic card is decent there is no way that a game that old will make the most of it.

What drivers are you using? See the first post in this thread: http://www.twcenter.net/forums/showthread.php?t=387992

Also, if you've not done so already you may want to make your exe Large Address Aware (LAA) by looking at the first two links in this thread: http://www.twcenter.net/forums/showthread.php?t=390419

[Skoran]

By adjusting some graphical settings the game now runs smooth besides 1 thing:

During battles my map (small one at the bottom) flashes. I keep seeing the arrows from the troops but the texture of the map becomes black (happens like 5 - 6 times every second).
Its pretty annoying, any fix for this?