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1 powerful card or 2 in sli/crossfire? - Page 2

post #11 of 51
Get two of the fastest single-gpu cards you can get!
post #12 of 51
Thread Starter 
Quote:
Originally Posted by railfan844 View Post
Since the 6990 is dual GPU on a single PCB, it will perform slightly slower than 2 cf'd 6970s. If you overclock it it will be almost or as fast. Keep in mind that you won't have the stuttering issues (negligible but still there no matter how good CF scaling might be) or driver issues that having 2 cards brings with it.

Also, noise and heat might be a concern. If your board has the PCIe slots spaced so that 2 CF'd cards do not have any room between them, dual 6950s/6970s would be louder and possible hotter. If your board leaves breathing space between the 2 cards crossfire 6900s would probably be a quieter option.

The 6990 is a loud card, and relatively hot too. If you want to overclock it you would probably need an aftermarket cooling solution.

It boils down to this:
If you don't plan on upgrading or you are uncomfortable with installing new waterblocks or heatsinks, go with 2 6950s in Crossfire. Unlock them to 6970s and they will blow the 6990 away, while staying quieter and cooler.

If you are feel like you might want even more performance later on and are OK with installing waterblocks/aftermarket cooling, go with a 6990. Watercool it and overclock it and it will be just as fast as dual cards. Since your power supply would handle it you could also add a second 6990 later on. Naturally stock cooling wouldn't even be an option if you're crossfiring 6990s. They're just too loud.
well concidering i don't know how to unlock them would getting 2 6970s be a better choice? and im not one for changing things to much i would like to water cool them but not right now.

which is better crossfire or SLI? i know it comes down to personal preference, iv never had an AMD video card before only had NVIDIA but iv noticed that the amd cards have more memory on them for the same as the NVIDIA cards do. how much memory does one need for a video card?
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post #13 of 51
What resolution will you be playing at?

If your at 1200p or below, a pair of GTX 580 1.5Gb is basically the fastest your going to get right now. For multiple screens or very high resolutions, two 2Gb HD 6970 would pull ahead in some titles that require extreme texture memory. It's also cheaper to go AMD, but you'll sacrifice some power.

My recommendation? Simple. Either two MSI GTX 580 Lightnings, or two MSI HD 6970 Lightnings. Assuming you have the funds
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post #14 of 51
Single card ftw. 6990 is a dual gpu card, though. I'd rather it than two 6970s... or two of any card. See the posts before mine for better reasoning. lol
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post #15 of 51
Quote:
Originally Posted by intelfan View Post
But in this case, a 6990 is running Crossfire even though it's a single card.
Correct. Did you think that this makes me wrong? It's addressed in the article...
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post #16 of 51
Thread Starter 
i like to play at the highest resolution i can get to run the smoothest, but i think my monitor only goes 1900x1080p (its an hd monitor) and will use hdmi as the cable

cant afford the 580 cards but the 6970 ones are duable.
Edited by sharkattack99 - 10/18/11 at 9:16pm
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post #17 of 51
I'm still looking for this mythical phenomenon known as "micro-stutter". Haven't seen it with my SLI 560Ti or 580 builds....
post #18 of 51
Thread Starter 
and what do you single card people recommend for a high end single GPU?
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post #19 of 51
With current drivers, micro-stutter is much lower than it was before. And if your very well above ~30fps, it's lowered even more.
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post #20 of 51
Get a GTX580 3GB if you want to avoid microstutter and not worry about being memory limited.

As for microstutter - I've seen it many times on a CF 5870 setup as well as my current set up. It ain't pretty.
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