Ok, I have posted this problem on multiple forums and have been in contact with XFX and EVGA. This seems to be a very obscure problem and I can't really think of anything else to try. Here's a link to my topic on eggxpert.com, in case I left anything out: http://www.eggxpert.com/forums/thread/517538.aspx
I have been using the same setup for over a year and have been using the XFX 8800 GTS 320mb. I decided to upgrade to the 260 GTX and purchased one from newegg.com about a week ago. While the Radeon X300 and XFX 260 GTX will not work, my XFX 8800 GTS 320mb works in both this computer and my older one.
When I put the XFX 260 GTX into my EVGA 680i SLI, I get a 1 or 2 second long beep and no monitor display. The 260 GTX's fan then starts up and everything sounds normal. It will continue to not give a monitor display and restart after about a minute. I have an old Radeon X300 that encounters this exact same problem with this motherboard. Both graphics cards work fine in my old computer's nForce Gigabyte 4 Series SLI. I have tested the 260 GTX in computer using this computer's PSU, and it works just fine. I have tried using the 260 GTX in this computer with only the CPU, motherboard, and the 260 GTX connected to the PSU, but still encounter the same problem.
When I put either the Radeon X300 or the 260 GTX in one of the SLI slots, it will give a monitor display. It will not get past the first screen, and it will tell me to place the graphics card into the single card slot.
XFX recommended I update my BIOS, so I am now on version P33 and noticed no change with my problem. EVGA recommended I fiddle with the 4-pin connector that is supposed to supply extra power for SLI setups, in an attempt to get the 260 GTX detected, but it didn't help any.
Specs:
Antec Trio Truepower 650watt
EVGA 680i SLI
Q6600 2.40GHz
4GB of DDR2 RAM (I can't remember the brand/details and am not sure how to check. I can do some digging if it's important)
I did the Microsoft memory test about a week ago when trying to figure out why I get screen tearing on some things. Did the normal test, and then did the extended test and left it on overnight. It found no problems.
Any help is very, very appreciated. I don't really know what else to try. I'm kind of a newbie when it comes to all this. If there's something wrong with this motherboard itself, why will the XFX 8800 GTS 320mb work? Could it possibly be a voltage problem? Somehow it's too much for the X300 and too little for the 260 GTX? I suppose that wouldn't give the exact same problem, though.
I'm just mumbling now.
Again, I greatly appreciate any help. I just can't figure this out.
I have been using the same setup for over a year and have been using the XFX 8800 GTS 320mb. I decided to upgrade to the 260 GTX and purchased one from newegg.com about a week ago. While the Radeon X300 and XFX 260 GTX will not work, my XFX 8800 GTS 320mb works in both this computer and my older one.
When I put the XFX 260 GTX into my EVGA 680i SLI, I get a 1 or 2 second long beep and no monitor display. The 260 GTX's fan then starts up and everything sounds normal. It will continue to not give a monitor display and restart after about a minute. I have an old Radeon X300 that encounters this exact same problem with this motherboard. Both graphics cards work fine in my old computer's nForce Gigabyte 4 Series SLI. I have tested the 260 GTX in computer using this computer's PSU, and it works just fine. I have tried using the 260 GTX in this computer with only the CPU, motherboard, and the 260 GTX connected to the PSU, but still encounter the same problem.
When I put either the Radeon X300 or the 260 GTX in one of the SLI slots, it will give a monitor display. It will not get past the first screen, and it will tell me to place the graphics card into the single card slot.
XFX recommended I update my BIOS, so I am now on version P33 and noticed no change with my problem. EVGA recommended I fiddle with the 4-pin connector that is supposed to supply extra power for SLI setups, in an attempt to get the 260 GTX detected, but it didn't help any.
Specs:
Antec Trio Truepower 650watt
EVGA 680i SLI
Q6600 2.40GHz
4GB of DDR2 RAM (I can't remember the brand/details and am not sure how to check. I can do some digging if it's important)
I did the Microsoft memory test about a week ago when trying to figure out why I get screen tearing on some things. Did the normal test, and then did the extended test and left it on overnight. It found no problems.
Any help is very, very appreciated. I don't really know what else to try. I'm kind of a newbie when it comes to all this. If there's something wrong with this motherboard itself, why will the XFX 8800 GTS 320mb work? Could it possibly be a voltage problem? Somehow it's too much for the X300 and too little for the 260 GTX? I suppose that wouldn't give the exact same problem, though.
I'm just mumbling now.
Again, I greatly appreciate any help. I just can't figure this out.