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Very slow GeForce 8800 GTX SLI Cards

Last response: in Graphics & Displays
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October 18, 2007 7:16:45 PM

Hi guys,

I have recently built myself a new machine. I have X2 BFG GeForce 8800 GTX cards running in my rig. All seems ok until I try and play games or run the Froggy and Cascades demo. Running froggy is just soooo slow, if I could see the fps, it'd probably be on 20 or worse. I have the latest Nvidia drivers, infact because of this problem, I've downloaded the latest beta drivers to see whether this would fix the problem - it hasn't!!

About ten minutes ago, when I tried running Froggy my whole computer crashed and went to the blue screen saying something about nvlddmkm memory problems.

Can anyone advise me please, as I've just spent out a lot of money on my new rig only to find it not working properly. My spec is below.

Thanks guys
Cpt.

Intel Core 2 Quad Pro Q660
4Gb PC2-8500 1066MHz SLI-Ready Edition Dual Channel DDR2
X2 Seagate Barracuda 7200.11 500Gb SATAII 32MB Cache.
X2 BFG GeForce 8800 GTX OC2 768MB GDDR3.
EVGA nForce 680i SLI 775 A1
Enermax Infiniti 720W EIN720AWT ATX2.2 Modular SLI Compliant PSU
Windows Vista 64-Bit
Creative Sound Blaster X-Fi Elite Pro 7.1 Sound Card
Creative GigaWorks 7.2 S750
CoolerMaster Stacker 832
Dell Ultrasharp 3007WFP-HC 30" Widescreen LCD Monitor
October 18, 2007 7:25:58 PM

Are you serious? What are those DOS games?

-enough sarcasm-

I'm guessing there's a problem with Vista. Try running in compatibility mode, right click..blahblah google :) 
October 18, 2007 7:30:54 PM

I'm confussed. I right clicked on Froggy shortcut and choose the compatibility tab. there's nothing in there for Vista?
Related resources
October 18, 2007 7:31:45 PM

http://downloads.guru3d.com/download.php?det=1297

Run 3dmark06 and tell us your score.


Another use for 3dmark, telling us if a rig is working as it should be.

You have done basic things like adding the SLI Bridge and switching on multi GPU mode, right? :D 
October 18, 2007 7:31:48 PM

Run in XP mode. Maybe those games don't like SLi, i'm not sure, I can't find any info on either of those titles.
October 18, 2007 7:33:31 PM

lol, froggy and cascades are not games. They are the DX10 demos.

Hatman, thx, I'm downloading it now and will get come back here with results. Regarding the basics. Yes, I have installed the bridge across both card. I was confussed about this though, because my BFG card seems to have two slots on each card for this. I have also turned on multi gpu mode.
October 18, 2007 7:51:00 PM

lol, sounded like Frogger and some other puzzle game knockoffs, thought they were some crappy freeware.
October 18, 2007 8:21:02 PM

cptpicard said:
I'm confussed. I right clicked on Froggy shortcut and choose the compatibility tab. there's nothing in there for Vista?



The compatibility mode is for backwards compatability only. Not enabling it is compatability for vista :D 


Generally, I found it to be 100% useless and it never, ever worked.
October 18, 2007 9:18:27 PM

Hi, something is seriously wrong. In some of the tests I was getting 0 -1 fps... that can't be right!!

My overall score was 6006.

I have also flashed my bios, installed chipsets to latest version. Still I'm having really slow fps.

Cpt.
October 18, 2007 10:13:26 PM

6006 is extremely low, you should be looking at 13k+ at a minimum.

Dw about the 0 -1 ones, they are benching your CPU it only ever gets 1 - 3 in most of them unless you got a really OC'd quad.


Im guessing you are using 2560x1600 on that monitor right, just to check you did run 3dmark at stock settings right? Thats like 1280x1024.

Ok, just thought of something.


http://www.nvidia.co.uk/object/winvista_x64_163.75_uk.h...
Install those beta drivers for a start.

Then install these updates to your Vista.
http://www.nvidia.com/object/winvista_x64_163.69.html
http://support.microsoft.com/kb/936710
http://support.microsoft.com/kb/938194
http://support.microsoft.com/kb/938979

I know there were some problems in 64bit vista. If these do not work, disable your SLI and bench on 3dmark06 with just one card, and see what score you get.

October 18, 2007 10:29:08 PM

Ok I'm downloading the bits you have said. I have already taken out the other gpu card, so at the moment I only have one in there and it's making no differece, which suggests to me it's a software issue, unless both my cards are malfunctioning which I doubt! I'll keep you updated.
October 18, 2007 10:57:53 PM

Have you tried each card on its own to see if they are both good.
Take one card out and run 3dmark06 and repeat the steps with the other card.
If they both give you good scores,then mabey the power supply is'nt cutting it.
October 18, 2007 11:17:38 PM

It doesn't sound like a hardware problem, yet. Im pretty sure his PSU is up to it though, its more then enough for the power draw of 2x 8800gtx's.
October 19, 2007 4:56:41 AM

Whoah this is disturbing. I'm just about to order a rig almost identical to yours. There shouldn't be any compatibility issues with the hardware itself should there?
October 19, 2007 11:46:17 AM

So what do you advise? I'm clutching straws!! I'm thinking about reinstalling WinVista 64-Bit and starting all over again!
a b U Graphics card
October 19, 2007 11:53:47 AM

Did you try flipflopping the cards? What if the card you left in was the bad one?
October 19, 2007 12:54:49 PM

cptpicard said:
lol, froggy and cascades are not games. They are the DX10 demos.

Hatman, thx, I'm downloading it now and will get come back here with results. Regarding the basics. Yes, I have installed the bridge across both card. I was confussed about this though, because my BFG card seems to have two slots on each card for this. I have also turned on multi gpu mode.
Cascades is Direct X10, Froggy is not. :D 
October 19, 2007 4:09:18 PM

cptpicard said:
So what do you advise? I'm clutching straws!! I'm thinking about reinstalling WinVista 64-Bit and starting all over again!



First things are the basics. Are your memory and CPU performing properly. Orthos would be good for testing the CPU and memory or memtest for memory. If the problem still turns out to be isolated to graphics then drop to one card and try each card on it's own. A quicker way to check the graphics than running 3dmark would be ATItool. Click on show 3dview and from my experience 1 gtx should be running at around 1000fps. As you try different things this is a test you can do in 5 seconds rather burning through 10 minutes waiting for 3dmark to complete a run.

If your cpu, memory and one card work properly then you can focus in on you're sli setup or psu as a possible problem.

I'm just throwing out some ideas here that take less time than a reinstall.
October 19, 2007 4:18:19 PM

Im guessing the hotfixes didnt work then.
October 19, 2007 5:01:21 PM

Ok here's an update. I had a spare SATA hard drive so I installed WindowsXP 32-Bit on it. I must say, the Nvidia drivers are much better! Anyway, after installing the latest nvidia drivers and restarting, the system prompted me to enable sli - it detected that ok, BUT.... I now have a warning message come up saying the following!

"To protect your hardware from potential damage or causing a potential system lockup, the graphics processor has lowered its performance to a level that allows continued safe operations". Does this mean there's something wrong with my PSU? Or maybe I have the wrong wire going into the graphics card. This PSU I have is very confusing!!

Cpt.
October 19, 2007 5:08:06 PM

Yeah it is a driver issue. Also try flipping the two cards. My experience with SLI is such that my two 8800gts's were overheating (110 degrees!) until I switched them around and my full tower with 6 fans is not the issue.

Switch the cards, download another set of drivers from 3dguru, and try again.

Also try some benchmarks (Doom3 and Unreal3 and Oblivion) in WXP Pro 32 just to make sure it is not VISTA. Remember Vista does NOT officially support SLI yet.
October 19, 2007 5:27:36 PM

I think its hardware, more specifically the psu. it sounds like the cards arent getting enough power, so they have slowed them selfs down so as not to use as much power. make sure everything is getting all the power it needs. try and take out one card, and giving the other card all of the power it needs. also make sure to check every wire for breaks. it would make sense for a reply if the cards were trying to draw too much power.
October 19, 2007 5:41:02 PM

Hi guys, this may sound silly but the problem was the card wasn't getting enough power due to it having to power slots (Never seen this before) and I only had one power cable going into one slot. However, I don't have enough cables to put four power cables into the gpu's. so how can this psu be sli complaint? Infact I don't think many gpu's have four power slots so the BFG series must be different to most others...
October 19, 2007 5:57:19 PM

cptpicard said:
Ok here's an update.
"To protect your hardware from potential damage or causing a potential system lockup, the graphics processor has lowered its performance to a level that allows continued safe operations". Does this mean there's something wrong with my PSU? Or maybe I have the wrong wire going into the graphics card. This PSU I have is very confusing!!
Cpt.


Don't know about the 8800, but this is the same message you get when forgetting to connect gfx card power connector on 6600 or 6800 cards.
Didn't the 8800's NEED the two power lines?
October 19, 2007 5:59:37 PM

Thanks, but I did say that in my message above... But for some strange reason my psu didn't come with FOUR 6-pin PCI Express cables. So I got to go out and buy another one :( 
October 19, 2007 6:01:24 PM

yeah that is what i thought. because the cards werent getting enough power, they thought your powersupply was too weak. so instead of trying to over burden your psu, the cards underclocked them selfs to protect your system
October 19, 2007 6:04:40 PM

But shouldn't my power supply have the cables? Am I missing something?
a b U Graphics card
October 19, 2007 6:07:29 PM

That power supply has three PCI-E connectors. Two are the standard 2X3(6P) and one is a 6P+2P. The 6P+2P can be used as a 6P, just leave off the 2 pins at the end (they are only ground anyway). As for the 4th connector you need, you may have to get an adapter that connects to two molex connectors and has a PCI-E 6P connector at the other end. Short of that you'll have to buy a power supply that has 4 PCI-E connectors. I would say that from the specs on your PSU, it should handle the current draw on the 12V (it says a combined max draw of 56A). Personally I would go the route of buying the adapter, check the Newegg link:

http://www.newegg.com/Product/Product.aspx?Item=N82E16812887001

That should get you going.
October 19, 2007 6:17:42 PM

check the cables that came with your video cards, they should have the adapt. you need in the box
October 19, 2007 7:17:48 PM

Found the adapters, great thanks. I'm not convinced the sli is working properly though. With one card in using both power slots I got about 25 fps on the frog. With both cards in and the sli bridge setup and enabled, I get exactly the same.

On the ATITool I get max 1300 fps with one card and exactly the same with both. Strange...
a b U Graphics card
October 19, 2007 7:37:57 PM

My guess is that the one card is not running since it isn't receiving the power it needs, so you are seeing the results inline with a one card setup.
October 19, 2007 7:45:57 PM

are you running the demo at 2560X1600?
October 19, 2007 9:02:02 PM

starcraftfanatic said:
are you running the demo at 2560X1600?

Yes.

Techgeek, I think you may be right. When running Froggy, only the one card makes a noise. The other does have power, but perhaps it doesn't have enough.. grrrrr
October 19, 2007 9:15:54 PM

Aslong as it has 2x 6pin connectors going into it, its fine.

Your PSU has 3 , so you need an adapter that makes 2x molex connectors into one pci-e connector. Then it will all work.
November 2, 2009 1:10:09 PM

Quote:
Aslong as it has 2x 6pin connectors going into it, its fine.

Your PSU has 3 , so you need an adapter that makes 2x molex connectors into one pci-e connector. Then it will all work.


I agree with Hatman. Trying that would be best before going out and forking over the cash for a new PSU when the one you have currently may work fine.

But if it does not work I would recommend you try going up to at least an 850W PSU if his suggestion does not work.
November 2, 2009 2:02:16 PM

Hi Cpt,

I may have some bad news for you, if you have used the 191.07 drivers with that mobo card combo.

http://www.evga.com/FORUMS/tm.asp?m=100961981

Seems like Nvidia and EVGA may have a disaster on their hands.
That driver is cooking mobos that use NF200 chips. Yes, a DRIVER is cooking hardware.
The symptoms of this are exactly what you described happening to you.
Sorry man, hope this isn't your problem.
!