ques about multi gpu

I just ordered a gx2 http://www.newegg.com/Product/Produc...82E16814143128

right now I have 3 Q6600's in vista64.
ds3l with a 8800gt
ds3l with a 8800gt
ip35pro with a 9800gt

my plan is to put the 2 identical 8800gt's in the abit ip35pro mobo. (corsair hx520)
but one of the pcie slots is 4x when used with 2 cards.
from what I've read on fah forums, it should be fine for a 8800gt.

then I'll stick the 9800gt in a ds3l (only one pcie slot).
and the gx2 in the other ds3l (antec 500 earthwatts).

do you see any probs with that setup? I know the power may be close, but hopefully it will work.. the 2 psu's that will be close are the hx520 and the antec EW 500.

and

I haven't done multi gpu before, though I do see a decent guide here
http://www.ocforums.com/showthread.php?t=568770

and fah guide has a small one... but if any of you have any links you'd like to post I'd love to have them.

I plan to use the dual connections on my monitor to get the cards folding.

Mike, I have two 8800GT's in my IP35 Pro running just fine. :up:

cool. I was hoping that was the case..

once I add the gx2, I should be at about 37k ppd... it should ship on monday...
glad I ordered it yesterday, they already ran out http://www.newegg.com/Product/Produc...82E16814143128

Quote:

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Originally Posted by MikeB12

I just ordered a gx2 http://www.newegg.com/Product/Produc...82E16814143128

right now I have 3 Q6600's in vista64.
ds3l with a 8800gt
ds3l with a 8800gt
ip35pro with a 9800gt

my plan is to put the 2 identical 8800gt's in the abit ip35pro mobo. (corsair hx520)
but one of the pcie slots is 4x when used with 2 cards.
from what I've read on fah forums, it should be fine for a 8800gt.

then I'll stick the 9800gt in a ds3l (only one pcie slot).
and the gx2 in the other ds3l (antec 500 earthwatts).

do you see any probs with that setup? I know the power may be close, but hopefully it will work.. the 2 psu's that will be close are the hx520 and the antec EW 500.

and

I haven't done multi gpu before, though I do see a decent guide here
http://www.ocforums.com/showthread.php?t=568770

and fah guide has a small one... but if any of you have any links you'd like to post I'd love to have them.

I plan to use the dual connections on my monitor to get the cards folding.

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If you run into trouble with this one I'd expect it to be the psu.

Knowing the rating alone (eg. 500w) is not enough. Take for example 2 different psu's from pc p&c. The 1k SR output is 66amps on the 12v rail. The 750watt quattro has a max of 60amps on the 12v rail. For folding Multi-gpu this is key. whilst I'm on the subject that 750 I'm talking about is quite efficient in 45-75% loaded usage. You'll have to check the specs of yours.


When I first started I used these guides:

http://www.forums.pureoverclock.com/...ead.php?t=3929

http://forum.xcpus.com/xtreme-foldin...e-nv-gpus.html

and one from Hardforum where the pics are now dead.It's old stuff but the principals still work

I am running 2-9600 gso in a P965 DQ6 Giga with E6600, a 500w antec with no problems...

I'll let yall know how it goes.. worst case scenario is I put it in my abit rig with the hx520. but I have a gut feeling the antec 500 earthwatss will do ok, it's a 80 plus psu and made from pretty good stock. I plugged the new setups and mild 3.3ghz cpu oc/vcores into http://www.extreme.outervision.com/p...ulatorlite.jsp and they came out mid to high 400's wattage on psu rec.. though I pprobably wont be pulling any 1.5v 3.6ghz oc's any more with a 500w class psu..

I think we'd be surprised if we plugged a killawatt in to see what our rigs are actually pulling.. we tend to overestimate psu usage these days,.

Jebo, one of my buds from OCW killawatt metered his Q6600/2xgtx260 rig while it was folding just for grins and it was pulling 484w.. I would have never believed that without seeing it in screenshots and a pic of the meter.
http://www.overclockingwiki.org/foru...20&postcount=8

I've Been trying to remember ....... When I first came here I ran my q6600 stock with 3*g92 overclocked gpu only for just under 500watts I think, but no smp, on x38 and 4gig (readings from a Kill-a-Watt clone)

I'm running 3 9600gso's w/ a 750watt PC P&C and its solid, but I don't know what its pulling at full load.

I think you'll be ok. Let us know if the psu can handle the 9800gx2.

That reminds me. I have an "old" enermax galaxy 1000 watt sitting around collecting dust. I might have to sell it. Hmm....

My IP35 Pro is run with an OCZ GXS 600W. It runs a Q6600 at 3.4Ghz, (2) 8800GT's, 2x WCG, 14 Dimes, (2) WD74 Raptors, lites & fans and has never faltered in 2+ yrs.:up:

You s.b fine Mike...Bring da Goose with ya...

looks like today is the day http://wwwapps.ups.com/etracking/tra...98R41230653561

OK, she's up and folding.. I just used the dual monitor connection to extend the desktop.
the only problem I had, and it drove me nuts for an hour is:
I tried using that -forcegpu nvidia_g80 flag on the second gpu and for some stupid reason it forced a ati core. and of course it eue'd over and over and over. I thought something was wrong with my setup extending the display, so I went through probably 4-6 reboots canceling the multi display, then re-adding it... then I noticed it kept trying to fold a ati wu, so I deleted the ati core it spit at me with that dumbass forcegpu flag, and it dl'ed a nvidia core and all was good. so it was never my hardware to begin with, dam fah buggy crap. why would a -forcegpu nvidia_g80 give me a ati core, that's retarded. the other client was fine, just that one client with that flag was messed up. otherwise it went smooth.. I used that link above to do the client configs http://www.ocforums.com/showthread.php?t=568770

here's the machine with the new gx2. it's at 1825 shader now, eventhough the tool says it's stock. gpuz shows the correct 1825 for both cores. I haven't tried the max yet. it's a hot sucker though.
http://img244.imageshack.us/img244/5549/26859347wu9.jpg


and my farm total after it was all said and done, and the 2 8800 gt's were moved into their new home in my main rig (abit IP35pro).
http://img237.imageshack.us/img237/2240/29305060mo9.jpg

Well done Mike...

[QUOTE=MikeB12;3580610] damn fah buggy crap. why would a -forcegpu nvidia_g80 give me a ati core, that's retarded.


Ummm... because Marvin told them you were behind the benchmarking dartboard even though I was the one that posted it. :rofl::rofl::rofl:

When I see those numbers I can't understand why some people keep bashing nV's multi-GPU cards or multi-GPU cards in general. Nicely done Mike, 10K PPD add is really something in the long run!

Quote:

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Originally Posted by WFO

Ummm... because Marvin told them you were behind the benchmarking dartboard even though I was the one that posted it. :rofl::rofl::rofl:

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probably so... it's like montezuma's revenge..

and the new baby finally starts showing stats results... I had an issue on my dual 8800gt setup, if I dont keep the second card connected to the vga outlet on my monitor it stops folding. only thing I can think of is I have my monitor set for power off at 20min. and it has never been a prob with a single card, or one of the cards now.. but that second card goes down if I don't keep it plugged in. guess I need to make a fake plug or something, or just leave it connected, which is probably what I'll do. the gx2 doesn't have that issue, but I don't keep any monitors plugged into it, so it's set at never power off monitor. or I guess I could get used to just tapping the power button on the monitor on my main rig with the 2 8800gt's and just leave it at monitor always on.

anyway, here's the fist day of good ppd from the new setup.

Nice set up Mike. Nearly 40k / day!

Not that it's my For Sale thread or anything, but if you guys head down into the For Sale forum here, go into the GPU sub forum, a guy is selling 9800GX2s for $200 each, shipped. If I had the cash, I would grab one.

wow, I think pulsar was looking for one...

ahh, forget it, he sold them http://www.xtremesystems.org/forums/...d.php?t=214639

Quote:

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Originally Posted by MikeB12

I had an issue on my dual 8800gt setup, if I dont keep the second card connected to the vga outlet on my monitor it stops folding. only thing I can think of is I have my monitor set for power off at 20min. and it has never been a prob with a single card, or one of the cards now.. but that second card goes down if I don't keep it plugged in. guess I need to make a fake plug or something, or just leave it connected, which is probably what I'll do. the gx2 doesn't have that issue, but I don't keep any monitors plugged into it, so it's set at never power off monitor. or I guess I could get used to just tapping the power button on the monitor on my main rig with the 2 8800gt's and just leave it at monitor always on.

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I changed the power setting to "monitor always on" as a test last night and it fixed my issue with the dual cards (second card that's not plugged into a monitor stps folding when monitor powers off in Vista)

wow, big difference when the cards on all 511 point low ppd wu's. -7k ppd overal

Question for ya Mike.
I put the Gx2 in my wife's new comp. I want to fold on the side that isn't used for the primary display. How do I tell which side is which and tell the folding client to use the secondary side?

on my gx2, the bottom connector is the primary. the first time I booted with no nvidia driver I had it plugged into the top and got no picture. freaked me out. so I powered off and connected to the bottom and it booted fine with picture. after the nvidia driver was installed and I extended the desktop I could boot to either.

but now that everything is running. that bottom still seems to be the primary, so when the gpu client runs with flags -gpu o and -gpu 1, the -gpu 0 flagged client is the bottom connector main display. I guess it all depends on which connector you monitor is plugged into. I think -gpu o is the bottom, and -gpu 1 is the top.

my 8800gt dual setup is the same way, except primary pcie slot is -gpu 0 and the secondary pcie slot is gpu 1. and that machine I do kill -gpu 0 all the time to watch media center because it runs smoother, but still folds on -gpu 1.

long explanation, but that's what I've played with and learned from trial and error.

thank you sir. your info was spot-on, as usual. :up: