Better Graphics Card Worse Results

Firstly the machine specs

Mac Pro 2009 4,1
Mountain Lion 10.8.2
Quad-Core Intel Xeon 2.66 GHZ
Memory 6 GB
XFX Radeon HD6870 card

Yesterday I swapped out the Radeon HD4870 card for the 6870 and updated the kext file, before I did this I could play GW2 at medium settings with good results now the game lags all the time, IE: When moving through the game world its all speed up slow down not good at all.

Same machine but running the game under Windows 7 in Bootcamp and it all runs fine with higher settings.

MacVidCards said:

???

What did you do and where did you read about it?

Click to expand...

Here - http://www.groths.org/?p=431

But I only used the ATY_Init.kext file and the Kext Helper b7 to install it.

The ATI Graphics Update.pkg I left well alone.

Asgorath said:

Weren't you the guy who initially said he didn't want to mess with non-standard cards, and thus ruled out a modern NVIDIA card? You realize that a Fermi or Kepler generation card would've worked right out of the box, no need for third party hacks or custom drivers? Can't help but think it would've been easier to just get a GTX 680 or something.

I don't know anything about AMD cards so hopefully someone else can help you figure this out.

Click to expand...

why I did not buy a GTX 680, the cost.

----------

ActionableMango said:

OP, I noticed you had a thread about flashing your 6870. ATY_init should not be used with flashed cards.

Click to expand...

I have NOT flashed the card.