How do you know if it is working? If it is working and you have 2 512mb cards does that mean you have 1gig total or not?
In the catalyst control center, if the box is checked, then it is enabled. I always run 3dmark06 and see if there is a marginal difference between my score with 1 GPU and with CF enabled - that's how I tell. Note that they have to be the same cards, or one will only help render physics and not graphical quality. But essentially, yes, you will have a gig of ram.
I have 2 His 512mb Radeon HD 2600 XT IceQ Turbo on a Asus m3a32-mvp deluxe/wifi-ap mobo and when I run pc wizard 08 it reports that they are not crossfired and that it is running directx 9 when it is supposed to be 10. It is enabled in catalyst.
Download 3dmark06 and run it. See if there is a difference between your score with 1 card, and 2. If there is a good difference (over 1k) then CF is working. If you are running XP, the program will report that the GFX card is in DX9 as only vista supports DX10. Also, download GPU-Z and tell me if that reports that CF is enabled/disabled.
Gpu-z says enabled but it does say it is running at x8 instead of x16. 3dmark06 score was 8991 with 2 cards and I haven't tried with 1 yet. I don't know if that is a good score or not. I noticed that my windows welcome screen is outlined in red insted of blue is there something to that or not. I don't know if this has any thing to do with it or not, but I have 4gig of ram but windows only says 3gig. It is 2 2gig sticks.
You should be getting above 10k in 3dmark06. The low score is probably due to the x8 enabled slot on your mobo. Can you change it in the BIOS? Does you motherboard support PCI-e 16 for both slots?
Yes my mobo is a Asus m3a32-mvp deluxe/wifi-ap http://usa.asus.com/products.aspx?l1=3&l2=149&l3=591&l4=0&model=1930&modelmenu=1
Yes x16 @ x16. My cpu is an amd phenom 9500. My intentions were to build a Spider Platform http://multicore.amd.com/us-en/AMD-Multi-Core/Quad-Core-Advantage/Spider.aspx I know my cards are not the 3800 series.
Thank you for your help. I noticed that you are running vista x64 have you had any problems. I tried for a month to run xp x64 with no luck.
Unfortunately, yes I have had a few. Luckly, I am duel booting both XP and vista. If I play a game in Vista for a while, it will soon crash (after 1.5 hours or so), and sometimes Vista will only boot when I have 1 card physically enabled. What I mean by this is, I have to unplug the power to my second 3870 sometimes for Vista to boot. Although I am thinking this is very rare since I have had this only happen when I first installed the cards, and when I flashed their BIOS's.
