6800 GT SLI enabled

[Cy6nUsX1]

Yes the slots (connector) are on top of the "SLI" cards but from what I have read not ALL of the cards with the slots on top are certified to run SLI. Although back on topic, XFX lists the 6800 GT as SLI ready. I emailed XFX tech support just to see if they actually reply.

 

[JBT]

Originally posted by: alyks42
Brand new system
WinXP SP1 DirectX 9.0c

no idea if this will help but try SP2 instead.

 

[alyks42]

Each one works individualy.
I'll look up about flashing the bios on my cards.
No way in hell am I using sp2

 

[ohnnyj]

I have had no issues with SP2 and have installed it on about five boxes at work and my own at home. It didn't cause a single problem so I would not worry.

 

[alyks42]

I just switched the cards, and the same result. I also switch the EZ thing and took out the first card, connected my monitor to the second card, and it works, so it's not the pci-e slot.

 

[Viper96720]

That's how it is you only hook up to the primary card. The other card doesn't output anything.
http://www.anandtech.com/video...oc.aspx?i=2284&p=1
has some benchmarks see if yours is close

 

[alyks42]

The EZ thing is in this position:


Card one

-------------------------
| single card |
| asus EZ |
| dual cards |
-------------------------

Card two

 

[alyks42]

and mine are nothing close to those benchmarks

 

[ohnnyj]

Probably an XFX issue, sounds like the cards simply don't want to work in SLI.

 

[alyks42]

I think the EZ card was in wrong, so I put it in the other way, and windows detected the second GPU, I tried running doom 3, but it crashed, so when windows started again, I uninstalled the drivers, reboot, then reinstall the drivers, and I ran doom 3's timedemo, and got 1 fps more.

 

[ohnnyj]

I notice that you have to be careful when putting the EZ card in. I once pushed it in too hard and it overshot the retention clips and kind of sat underneath them. The computer would turn on but would not boot, luckily nothing was damaged in the process.

 

[alyks42]

so, I think SLI is working, just not with AFR, I loaded up farcry with the show load balancing enabled, sure enough, the bar was moving showing the balancing. I took off the sli connector and noticed the bottom half wasn't being shown, so it's working fine with SFR, just not AFR.

(Alternate frame rendering, split frame rendering)

Doom 3, which uses AFR, got a higher fps after I flipped the EZ connector thing, but the whole thing was skipping, instead of just the parts where it had a heavy load.

 

[alyks42]

ok, so SFR works fine. With AFR, I thnk the problem is that it turns off SLI, or something.

 

[Astratuner]

dude i have 2 6600 gt's and sli is enabled he say

but i i run 3dmark05 i score 3127 points, where i used to score on sli 6250 points

but now i have a new psu, and a benq fp937s+ ( 19" @ 8ms )

and i ve done everything but he wont do sli anymore, i just dont get it :s

i did a format, mesured my volts, bios flashed, 71.24 worked 1 week before :s


my dvi connector from the tft and from the vga card are different ? does it matter ? cause from the tft it's missing a few pins...

 

[PSU Fan]

Originally posted by: LTC8K6
All 6800 series and the 6600GT can be used in SLI mode. You should easily spot the SLI connector and it's slots on the top of the card.

You may have to flash the BIOS on a few brands of cards to get the SLI mode working. Gigabyte 6600GT's being one example.

There are some 6800GTO cards out there that I have heard are not working in SLI mode.

Careful...I bought two MSI 6800 (TD-256E) cards which proclaim they are SLI-ready and eventually had to return them because I could not enable dual-GPU. They were installed correctly, XP detected them and asked if I wanted to dual-enable, but the check box would not stay checked and no re-boot would occur. I found at least one other guy with similar problems with his MSI cards. I won't be a purist and say that a card/mobo has to appear on the NVidia web site list as "approved" before it will work (I think that's more about NVidia getting paid a certification royalty), but I think that there's an opportunity for errors due to the rush to get these cards out to meet demand. MSI, for instance, tested the SLI performance of their cards using their in-house MSI mobo...not an "approved" mobo from the NVidia list.

 

[drpootums]

nice PSU, i love mine!

 

[alyks42]

why the useless posts?

I think I'm just going to return my graphics cards, and buy the evga cards.

 

[Astratuner]

still nothing found alyks42 ?

im with the same problem as i said in page 2

 

[quattro1]

What you need to do is uninstall the drivers completly. Then install both cards and the paddle with the side that says SLI plugged into its slot. This switches the PCIE lanes to x8 on each card and lets Windows recognize the second card.

When you boot up, Windows will recognize the cards. I would cancel the Found New Hardware Wizard and run setup.exe from your driver installation. This should now install both GPU's.

Once that is done, reboot the system. When you come up, you will get a bubble that says this system is SLI capable. You can either click on that bubble and it takes you to a window where you enable SLI. After enabling, a reboot is required.

SLI should now be enabled and you should see higher numbers in Doom3, specially at higher resolutions. The paddle has nothing to do with AFR or SFR. If SFR is working, AFR is working. These profiles are preset by the driver.

I know you may have done this already but give it another shot.

 

[Astratuner]

Originally posted by: quattro1
What you need to do is uninstall the drivers completly. Then install both cards and the paddle with the side that says SLI plugged into its slot. This switches the PCIE lanes to x8 on each card and lets Windows recognize the second card.

paddle ?

do u mean the SLI Selector witch means single video card or dual video card ?


first put 1 vga card in it ? set it to single, then add 2nd card and change it to dual is that what u r saying quattro1 ?