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Help! Cjrossfire problems

S

Super_Herb

n00b
Joined
Nov 4, 2007
Messages
18
Ok, I'll give the full brackround system specs in hopes that someone can help me with my utter Crossfire enabling failure.

System specs:
Asus p5q Pro
Quad 9400 - not overclocked for this
Gigabyte 4870 512mb
HSI 4870 512mb
4 gb Gskill ram
600 w Silverstone Strider power supply
3 - 120 mm fans
DD water pump
2 - 80 mm fans
Windows Vista Ultimate

No matter what I try, I cannot get the two cards to work in crossfire. As soon as I hook up crossfire, I get a BSOD saying something about attempt to reset display driver...timeout failed. Then upon reboot I get a "no ATI graphics driver installed or the driver is not functioning properly".

So I've tried all the standard troubleshooting fixes I can come up with. Both cards work independently. Both cards seem to work without the crossfire straps connected. I've uninstalled, cleaned and reinstalled updated drivers with one card in, both cards in, both cards in crossfire. I've restarted in safe mode and disabled ATI External Event Service. I've used driver cleaner. I've used every trick I can. Basically every single thing I can find that the internet has to offer. The windows install is relatively fresh and has only seen the original 4870 as a vid card.

Everything works until the moment I connect the two crossfire straps.....if I install the cards without the straps it seems they both work - windows device manager has them both working with no conflicts. As soon as the straps go on, one card is disabled with a conflict and everything else goes to hell until I remove 1 card and uninstall the drivers. What else can I try?

I've used PSU calculators and it seems my power supply is adequate. Maybe my PSU isn't up to the task, but I've turned off all fans and everything else just to minimize the load but even still I get the crash. The specs say 4 - 12v rails at a combined 504W/42A so it seems like I should be ok. Maybe I should hook up an aux PSU to run the pump and stuff.

Any suggestions?
 
which drivers have you tried?

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I've now hooked up an aux PSU to run everything but the mobo, hd, 2 dvd drives and 2 4870s. I would think that my current 600w PSU is good enough for that alone.....especially when not under any load. I'm currently seeing if the crossfire is working.
 
Got a friend with MB to try on or swap cards with? Maybe try older drivers from the past 3 months

Or maybe the problem is with the strap, get another.
 
No help with the additional PSU. Windows still disables one card then says no drivers are installed when I try to re-enable. I'm giving up 'till tomorrow. Maybe in my frustration I'm missing something obvious. No idea what it could be though as I've done troubleshooting in a systematic manner to eliminate possible problems. Maybe a fresh install of Vista will be required to eliminate any source of problems from that end.....since I'm at a loss right now.

In 10+ years of building my own systems I've never had an issue as stubborn as this.
 
error 43? its what's keeping my x38 4870x2 cf machine in limbo right now. maybe a os reinstall is necessary. also, what card is your primary display connected to? crossfire can be a little finicky, working correctly only when plugged into one card or the other.
 
Well, it looks like it was a power supply issue. I went and got a new PC Power & Cooling 750w PSU to replace the old 600w unit. After all my testing it seemed that was the last possible choice. Too bad it took about 4 hours of screwing around to determine it. :mad:

Even though the old one was SLI ready it just didn't seem to have the juice necessary. Once I changed out the PSU, the crashes and errors quit. Now CCC indicates I have crossfire enabled so time to test it all out.
 
just cuz its SLI ready doesn't mean its crossfire ready ;)

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