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SLI wasted in SC2?

post #1 of 24
Thread Starter 
I hear different things from different places regarding SC2. Some people say it is massivly CPU intensive while others say it is also GPU intensive. I do believe this as I have seen bench marks using the same GPU with differences in fps as much as over 100% (30fps w/ amd chip vs 60+ fps with i7 intel). I understand SC2 can be cpu intensive because of the AI, but wouldnt that just be in single player or vs the computer? I play mostly online multiplayer where I dont think AI would be nearly as intense as single player.

So my question is, is SC2 CPU intensive in single player, but GPU intensive when playing multi player at higher gfx settings? I just bought another gtx 470 to put in SLI, but am worried I wont see much an increase in fps. I run this game at 2560x1600 resolution and have an overclocked i7 2600k.

Does anyone know if I will see an increase in fps with the extra video card or is my cpu already being strained to is max giving me best possible fps I can hope for at 2560x1600?

Thanks as always for your guys help.
    
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post #2 of 24
You have the fastest gaming CPU available right now, SC2 will not be a problem for it. It is true however that it is a very CPU dependent game but like I said your CPU could easily feed as many GPUs as you want to throw at it, so don't let worrying your CPU isn't enough stop you from adding another 470. I don't know how good the SLI profile is for SC2 though so I don't know what kind of scaling you would see from a second GPU in that game. Also at your resolution, even if you didn't have the best gaming CPU on the market, games are usually more contrained by GPU power, specifically VRAM. In your case 1.25GB of VRAM is not bad but it is small enough that I would not add a third 470, if you ever get to the point that 2 470s are not enough for you then I would suggest increasing your VRAM as well as overall GPU power. Something like a SLI 580 3GB or most likely the next generation of cards would be the most appropriate upgrade path for when you feel the need again. GLHF with your rig
Edited by juano - 4/29/11 at 11:36am
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post #3 of 24
Thread Starter 
Quote:
Originally Posted by juano View Post
You have the fastest gaming CPU available right now SC2 will not be a problem for it.
Thats why I am asking... Was it a waste for me to go SLI? Is my only hope going for a higher cpu overclock?


Also I could use higher fps... It will drop below 30 at times due to the resolution.
    
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post #4 of 24
Read my edit if you haven't but no what I am saying is that your CPU is certainly more than powerful enough for SC2 even at stock clocks. You can overclock your CPU if you'd like, and especially seeing as it's underwater you kinda have no reason not to, but even at stock your CPU will not be limiting you and you will be able to feed at least 2 470s without a problem. If I had to guess what is causing your FPS drops I would say VRAM limit, so you could try lowering the AA to test that theory out.
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post #5 of 24
SLI will not be wasted if your FPS are dropping that low.
    
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post #6 of 24
Quote:
Originally Posted by BallaTheFeared View Post
SLI will not be wasted if your FPS are dropping that low.
This. Your minimum frame rates will jump by a huge amount.

Plus, surely you play games other than Starcraft 2 from time to time?
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post #7 of 24
Go do that Desert Strike custom Map.

If you can zoom in and maintain an FPS greater than 2 on the final battle sequence, you rock, and your computer rocks too.

I want a computer that can handle the desert strike final battle smoothly one day. One day!
post #8 of 24
Thread Starter 
Thanks for the replies guys.

I dont think AA is supported in sc2 at 2560x1600, so I dont think I am hitting any vram walls. I guess I will know soon enough about performance gains as soon as the extra card arrives on monday.

This solution is basically a band-aid until the new keppler cards come out. I was goign to buy a 590, but then realized I only play sc2 so there really wasnt much point in dropping that much on a GPU at the moment. Once a new game comes out that I want to play, I will upgrade to all new GPU's.

I could always lower the gfx detail, but if I did that I might as well play BW lol
    
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post #9 of 24
The problem here is that Sc2 doesn't really support sli or crossfire. Most people report on the battle.net forum that they get better frame rates with sli off. Also at your gaming resolution the vram on your 470s are limiting you. You need at least around 2gb vram at the resolution in your sig rig where as your 470s only have 1280MB vram each. Together they dont add up to 1280MBx2 unfortunately. One thing your could try is turnins sli off to see if your fps increases.
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post #10 of 24
You may want to check your Nvidia control panel as AA can actually be forced in SC2 through there, and it could be forcing some in SC2 if that is your global setting. I think once you get your second 470 in then waiting till kepler to do any further GPu upgrading would be the best idea. If 2 470s won't give you what you need you would have to spend a whole lot to get any better and that money would go much farther when kepler comes around.

Techaddict he doesn't have the second one in yet. The OP may appreciate a link to these SLI problems people have, because while I played plenty of SC2 I have no clue how well SLI works on it.
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