CROSSFIRE Problem HELP

[THANOWS]

I have radeon HD 3650(Sapphire) and yesterday I bought radeon HD 3650(Gigabyte).....and I don't know how to do crossfire.!!!HELP!!!

[Thybalt]

If you have a crossfire capable motherboard, just insert both the graphic cards in the pciex slots and connect them with the interconnect (the small bridge type piece of hardware found inside the gfx package) and fire up your system. The connector is located at the front end of the board (opposite the power connector). Good luck.

[DMB2000uk]

Once you have booted, you might have to go into the catalyst control center and look in there for an option to enable crossfire.

Dan

[THANOWS]

one of my cards doesn't have interconnect slot,can i do it just with software???ALSO in catalyst doesn't say nothing about croosfire.

[DMB2000uk]

You can do it just in software yes.

In the advanced catalyst menus, there should be a crossfire tab at the very bottom of the menus on the left.

Dan

[THANOWS]

there isn't any crossfire think...

[DMB2000uk]

Are you at the most recent catalyst driver? Try updating to 8.9.

What are the full specifications of the rest of your PC?

Dan

[THANOWS]

I have the most recent drivers.
MY PC
Intel core 2 QUAD
ram DDR2 2gigabyte
motherboard ASROCK 4coreTwins-p35

[DMB2000uk]

Do you have the molex power connector plugged into the your mobo (next to your 24ATX pin)? Is the monitor cable plugged into the top graphics card?

Does catalyst report there being two cards installed? (If you can't see it anywhere in the Catalyst, go to device manager (right click my computer -> manage -> device manager), and look under display adaptors).

Dan

[THANOWS]

Thank for your help, I plugged the molex connector and The catalyst detect two cards(when i plugged the second card in display manager apears 4 slots for monitors) but i still don't get the right performance. I also have a problem with catalyst it's shuting down when I turn on the pc, and now there are two unknown devices that i can't detect. I'm confused .The graphic cards apear without a problem.

[DMB2000uk]

Sounds like a problem with the catalyst drivers.

Try uninstalling all ATI programs, reboot, then run driver cleaner pro. Reboot once more then try re-downloading and installing the latest catalyst drivers from ATI's site and reinstall them again.

Dan

[THANOWS]

the problem still appears, i forgot to mention that the one card is sapphire HD3650 512MB DDR2 and the otherHD3650 512MB DDR3. Is this the problem?

[DMB2000uk]

Yeah, that more than likely is the problem. The cards have to be identical for them to crossfire.

Dan

[Athlonite]

Actually no they dont have to be exactly the same merily from the same family>>ie: xt+xt or Pro+pro ram speed isn't a factor as the faster card will only run as fast as the slowest card installed
what you need to do is place the slowest of the two cards in the primary slot and the faster one in to the secondary slot

I had this settup running
PCI-e slot 1= GeCube Radeon HD2600XT GDDR3 (cclk 800MHZ, mclk 1000MHz)
PCI-e slot 2= Asus Radeon HD2600XT GDDR4 (cclk 800MHz, mclk 1000MHz(original cclk 800MHZ, mclk 1100))

so it does work but not if you using a pro + XT as the XT series needs the Interconnect where as most Pro' use software method

and the two cards you own one is a software only crossfire model and the oteher reqires an interconnect you'll most likely need to replace one (personaly i'd go with another interconnect type card)

[Athlonite]

Oh and just as an aside to previous post in regards to using driver cleaner ATI do not recomend you use it as it can cause more problems than it solves your advised to use the Catalyst install manager provided by ati to remove your drivers

[DMB2000uk]

Oh and just as an aside to previous post in regards to using driver cleaner ATI do not recomend you use it as it can cause more problems than it solves your advised to use the Catalyst install manager provided by ati to remove your drivers

ATI would have you believe that their uninstaller cleans up everything well enough for it to be the only thing you need to use.

But it doesn't, and so once you have uninstalled using the ATI program, driver cleaner pro is still needed to get rid of the settings that are left behind.

Dan

[Athlonite]

yes and by ridding your system of those settings is what causes the problems with installation of ATI's drivers as ATI have said time and time again do not use driver cleaner or driver sweeper when removing drivers just use the install manager provided by ATI reboot and install the latest downloadable driver available which in this case is the 8.10 catalysts

[DMB2000uk]

So installing ATI's drivers on a fresh install of windows causes problems for the ATI installer?

Dan