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Sli vs Single Graphics Card
show user profile  donvella
Hey all, i have an 8800M GTX 512 in my notebook and i want to put another 8800M GTX 512 in to increase viewport performance in max, however will i notice much difference - or is it a waste of money? This is the sole purpose for the graphics card im not really interested in games as such.

and yes, this notebook is build for sli graphics cards i was just wondering if it was worth the money.



read 596 times
2/24/2009 7:23:45 PM (last edit: 2/24/2009 7:23:45 PM)
show user profile  Kajico
i don't think you'll see a viewport performance increase in Max, and SLI kills access to a 2ndary monitor so if you plugin another monitor and enable SLI you won't be able to use it, so I'd rather have a 2nd monitor than faster gameplay/viewport speeds

(\/) (°,,,°) (\/) Woop woop woop!

read 592 times
2/24/2009 7:34:35 PM (last edit: 2/24/2009 7:34:35 PM)
show user profile  donvella
cheers for that, i need my 2nd monitor lol.

read 590 times
2/24/2009 7:57:14 PM (last edit: 2/24/2009 7:58:55 PM)
show user profile  Stephen R.
How is SLI not going to improve viewport performance? If you're in SLI mode all the tasking is split up between the cards at a certain point (like when card 1 gets to 75% load, 25% of the load is shifted to the 2nd card, when card 2 gets to 65% load 25% gets shifted to the third card)?

Im not sure how crossfire works, but it should work about the same, and crossfire lets you have more than one display at a time (crossfire being ATI's version of SLI)

read 577 times
2/24/2009 9:05:48 PM (last edit: 2/24/2009 9:05:48 PM)
show user profile  donvella
Does anyone actually use sli and have noticed any difference?

read 569 times
2/24/2009 9:34:57 PM (last edit: 2/24/2009 9:34:57 PM)
show user profile  Dejitarujin
There was a time when certain issues with either SLI or Crossfire (can't remember which) could actully decrease performance in certain situations. I'm not sure if that's been fixed yet. Either way, I'm pretty sure the general ruling is that a single, more powerful graphics card is a better idea; doubly so when you're upgrading from an old card.

Oh, and I myself use a single 512MB 8500. I tend to hit a software limit before the hardware becomes a bottleneck.
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 566 times
2/24/2009 9:52:56 PM (last edit: 2/24/2009 9:54:17 PM)
show user profile  Stephen R.
I can use my tri SLI system to benchmark it if u want, I'll just make a scene with like 100,000,000 poly's and clock the viewport speeds with 1 card vs having the cards in SLI

read 562 times
2/24/2009 10:00:11 PM (last edit: 2/24/2009 10:00:11 PM)
show user profile  donvella
dej: The reason for my upgrade is that ive hit the hardware limit, not software. I have 512 8800GTX and 4gb ram.... my viewport is too slow and i ran out of ram the other day. time to upgrade. It doesnt slow down until a million pollies or so but its still not fast enough.

stephen: i would really appreciate the effort steve, cheers.

read 559 times
2/24/2009 10:11:18 PM (last edit: 2/24/2009 10:13:08 PM)
show user profile  Stephen R.
The answer is: no xD not what I would have expected, but thats what tests are for :)

Single Card: 1.19fps @ 1.2m polygons
TRI-SLI: 1.4fps @ 1.2m polygons

This is with opengl, I'll try it again using Direct3D

read 553 times
2/24/2009 10:17:11 PM (last edit: 2/24/2009 10:17:11 PM)
show user profile  Toen
Does your viewport slow down when interacting with the viewport/scene like rotating your view around or while things are animated in the viewport?

Just asking because the first one is GPU related and the second one is CPU related.
read 549 times
2/24/2009 10:45:14 PM (last edit: 2/24/2009 10:46:38 PM)
show user profile  Dejitarujin
Interesting - yours doesn't seem to fare any better than mine. Actually, yours doesn't seem to fare any better than mine used to with an old 256MB AGP card on a 32-bit system; I haven't yet pushed my current rig that far. Are you sure there's not some other issue affecting your performance?
Specialty: Non-organic modelling and effects.
Setup: 3D Studio 2010 with finalRender.
Rig: No, no I can't.
read 546 times
2/24/2009 10:54:29 PM (last edit: 2/24/2009 10:54:29 PM)
show user profile  donvella
Stephen: Opengl runs like crap on my video card too, in a large scene i get about 2fps, with direct 3d i get 400+. Thanks heaps for your tests, i would love to see how direct 3d came out like.

Toen: it just slows down after i have too many pollies with too high res textures and i want to rotate etc. I am not doing any animating for the time being - plus my cpu renders extremely quick and my viewport runs at 400+ fps until i over load it.

Dej: mine actually runs faster then any of the graphics machines at work and they are all dual 3ghz with 295GTX's. Obviously they are going to have more video power but i get them on the render since mines quad 2.67. The machine is extremely quick, plays the latest games on the highest res without any problems, runs everything just fine EXCEPT OpenGL. I dont think there is any problem with the hardware software, im just using it to its capacity and i was wondering if it would be worth sli'ing my current card, or waiting until they have 280GTXs for my laptop. Im about to upgrade it to 8gb ram and another 2 harddrives, so i thought id chuck another video card in, if its not worth it, ill wait til the 280M GTX hits the shelves and chuck one of those in.... or buy a tower lol

Cheers guys

read 536 times
2/25/2009 12:44:13 AM (last edit: 2/25/2009 12:46:18 AM)
show user profile  Stephen R.
Direct 3D Results:

Single Card Max FPS: 115.44
TRI-SLI Max FPS: 363.59

I'd say thats a difference :)

read 496 times
2/25/2009 1:53:54 PM (last edit: 2/25/2009 1:53:54 PM)
show user profile  Bolteon
yeah but is it a worth while one? past 60 you can't tell the difference.

-Marko Mandaric

read 491 times
2/25/2009 1:56:09 PM (last edit: 2/25/2009 1:56:09 PM)
show user profile  Stephen R.
it will be when the difference is 35fps vs 10fps

read 485 times
2/25/2009 2:03:30 PM (last edit: 2/25/2009 2:03:30 PM)
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