is sli enabled

[karlthomas102]

here is gpu-z is it serpost to say sli enabled?

[mhiner]

Mine said the same thing in vista when I was running 7600gt's in sli. I ran 3dmark06 and it scored as though it was running in sli. So I figure it must be a bug with vista and gpu-z. If you are concerned about it run 3dmark and then go to the nvidia panel and disable sli, reboot and run 3dmark. My guess is the score will be off the typical 1.7~ times. Its an easy way to tell.

Michael

[karlthomas102]

i have dont score wnt up but by 500 points for another 8800gts

[mhiner]

Do you have the latest bios? Are you using the sli bridge?

[karlthomas102]

yh my score is 13540 ? s this right for SLi 8800gts>?

[mhiner]

We have a Q6600 with a single 320mb gts (g80) card here at the shop and it scored 10200 on 3dmark06 so I would expect a second card to come in somewhere around 16-17000. That is on xp pro with 4gb. My other concern looking at your profile is your power supply. I don't think that it can keep up with your system and 2 640mb gts'.

[karlthomas102]

that what i thorght it is one year oldnot been running almost 10hours a day-im running 3dmark agin in Non SLi brb
ps before i reinstalled windows (im useing vista 64bit) i was getting in the high 13k be fore i bought the second card

[mhiner]

I have a 8800gt and before I purchase another to SLI I'm going to purchase a 850-1000 watt power supply. The max my system pulls is 300 but it has more to do with the amps that the 12 volt rails will see.

Michael

I lied, I just looked through my notes and it did hit 312 a few weeks ago when I was looping 3dmark. My best score is 9164 on my home pc with a single 8800gt.

[karlthomas102]

so brb just finding a psu see what you think

[karlthomas102]

will this be enough http://www.microdirect.co.uk/(25832)Coolermaster-PSU-Real-Power-M700-700W.aspx

[mhiner]

There's going to be other things that can contribute to lower scores, like what speed is your ram running at? ie how much bandwidth are you getting. If you running @ 200 you have a lot less than if you are running @ 225. One thing about 3dmark is that the more bandwidth you can squeeze out of your system the higher the number. Honestly the reason I'm running @ 260 (cpu @ 2.6) is because I get a better score there than with the cpu @ 2.8 and the memory @ 240.

[karlthomas102]

how do i check bandwith

[mhiner]

That is a nice power supply but the 12v rails are rated @ 19a which means they probably can do like 20-21 amps. You probably can get by with that but I'm by no means a Power Supply guru. Let me look to see what the 12v amp draw is on a g80 640mb gts.

[mhiner]

Si sandra is an easy way.

[thideras]

If they are rated to do 19a...I very much doubt that they could do 20-21. The only power supply I've seen give more than their rating is the Corsair HX620. It wasn't by much either ;)

[mhiner]

thideras, like I said I'm not a PSU guru by any means. Do you have a recommendation for a power supply?

[JamesXP]

I'll get you a decent PSU for 80 within UK just you watch :)
http://www.scan.co.uk/Products/ProductInfo.asp?WebProductID=446787

[thideras]

thideras, like I said I'm not a PSU guru by any means. Do you have a recommendation for a power supply?If that is the issue, the Corsair hx620 will run just about everything out there ;)

For power supply reviews, I turn to either members here (Oklahoma Wolf, RollingThunder and a couple others) or check out www.jonnyguru.com (http://www.jonnyguru.com)

OW has written a few reviews for JonnyGuru...and JonnyGuru even has an account here at OCF!! :D


What I would do to determine if SLi is enabled is run a single card through 06 with the highest res you can do....max details with AA set low. It isn't default settings, but we want to stress the GPU to make sure it isn't a CPU limitation (mine is CPU limited with 1 card!! :eek:). Write down the settings, run the benchmark. Enable SLi and try again. If the score goes up, it is enabled ;)

[mhiner]

KarlThomas, I don't see any reason why that won't work (the 700 watt coolermaster). I can't find that amp draw for the 640mb gts so you may want to do a search as I'm sure this question has been asked somewhere on the boards here @ ocforums.

edit: While I was typing you got a few responses. Definitely do some searching!

[JamesXP]

The CM PSU isn't that great quality over priced for waht it is.

[karlthomas102]

thx for all you responses i dotn rely know what to do im downloading Si sandra and makeing shure that i will get the best bandwith i can
what do you get for 3dmark? ;)
Edit if i can i rely dont want to spend eny muney as i simply doont have it spent the rest of it on my rc savge's

[mhiner]

I think thideras is right when you look at possibly being cpu limited. But since you already have the cards I think you should try testing each card independently and make sure you are getting a similar score with each of them. You can run 3dmark on back to back pulls and get 200 points difference, so I would say that you should work with those boundaries. Again make sure you have the latest bios for your motherboard and make sure that you are using the SLI bridge when you put both cards back in your system. Then maybe think about that psu from Corsair that they are recommending.

As far as memory bandwidth vs performance, that is just something you are going to have to play with. I spent close to a week playing with cpu multipliers, frequency and fsb to figure out what gave me good everyday use with the best gaming performance.

[karlthomas102]

that program what do i use to get mem bandwith if i use preformanc analyser mypc crashes even at stock speds
dont worry found it what ddandwith you useing?

[thideras]

that program what do i use to get mem bandwith if i use preformanc analyser mypc crashes even at stock speds
dont worry found it what ddandwith you useing?I am having an extremely hard time understand what you are trying to say, can you proofread that please? :eh?:

My guess: You ran a memory bandwidth test and it crashed.

What memory test, was it system memory or video card memory?

If it was system memory, download an iso of memtest+86, burn it to a disc and boot off of it. Let it run for a few hours and see if you get any errors.

If it was video card memory, remove one card and try again.

[karlthomas102]

sorry im a bit quick and the laptop dont help the keys ar rely sticky
system mem ill do memtest when i dont need the pc

[thideras]

sorry im a bit quick and the laptop dont help the keys ar rely sticky
system mem ill do memtest when i dont need the pcCool, just keep us updated :D

[mhiner]

KarlThomas, you had asked about 3dmark06 scores. My system (in my signature) scored a 9164. The system here at the shop q6600 @ 2.4, p5k deluxe, 4gb ram, raptor os and 750 western digital data, 8800gts 320mb (stock settings) with a thermal take toughpower 850 power supply scored 10809 with the default settings (1280x1024 no aa). Hope this helps.

The other question is have you tried deleting the driver and re-installing it? (169.25)

Could you post the individual card scores as you do it, ie only one card in the pc at a time. And then post what your score is when you put both in and sli?

edit: NeuralNet pointed out in another post that Vista and SLI requires hotfixes. Have you downloaded those yet? If not here is a link http://www.nvidia.com/object/windows_vista_hotfixes.html

[karlthomas102]

yh dont the fotfix long time ago