Is SLI realy needed?

Solution
Really hard to answer that as I know nothing of your system, but to answer that to majority of people no.

#1, best to stay with 1 more powerful GPU

#2, SLI is only really needed if you wanted more graphics power but limited budget, so your better off going for the same card if the only card your limited to upgrading is of similar or close performance.

Overall, No. SLI is has problems with comparability and micro-stutter and overall isn't worth it. It is much better to go with one better single GPU which has far less hassles and issues, as if the game doesn't support SLI, your running off one card that may not be very good.
Really hard to answer that as I know nothing of your system, but to answer that to majority of people no.

#1, best to stay with 1 more powerful GPU

#2, SLI is only really needed if you wanted more graphics power but limited budget, so your better off going for the same card if the only card your limited to upgrading is of similar or close performance.

Overall, No. SLI is has problems with comparability and micro-stutter and overall isn't worth it. It is much better to go with one better single GPU which has far less hassles and issues, as if the game doesn't support SLI, your running off one card that may not be very good.
 
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benkrems

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Feb 26, 2014
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here is the system I am planning to build.

Corsair RM-750 80 Plus Gold Power Supply

Corsair Vengeance Pro CMY16GX3M2A1600C9R 16GB (2x8GB) DDR3

ASUS Maximus VI Hero Motherboard

Corsair Hydro Series H100i CPU Cooler

Microsoft Windows 8.1 64bit OEM

Corsair Obsidian 750D Case with Window

Seagate Barracuda 1TB ST1000DM003

EVGA GeForce GTX 770 Dual SC 2GB

Intel Core i5 4670K

 
There is two main reasons why its done: better preformance per dollar options and pushing limits of modern hardware. Two 770 is faster and cheaper than 780ti and that would be an example of better preformance per dollar options. Pretty much everyone has seen that guy who went for quad sli Titans and thats an example of pushing the limits of modern hardware.