Hrishi
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Let's put it this way:
You WON'T get the SLI GPU in India. You will have a single GT 755m and be happy with it because this is INDIA. According to Lenovo people, Indians don't NEED the power of GT 755m SLI.
Yes, the laptop will support Optimus. I don't think you have much experience with IBM laptops, gaming on battery will result in FPS drops. You will HAVE to game on battery.
Hope this helps.
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GT 650ms are almost extinct now. core i7 quad is just too powerful. I haven't seen a game which utilizes my core i7 3632QM more than 60% with Watch_Dogs leading the pack with 60%. However, games like Crysis 3 benefit from it due to the extra threads. I haven't been able to bottleneck core i7 quad with GT 650M SLI OC(converted to GTX 770m).
Meanwhile, processors like core i7 4500U(just slightly weaker than core i5Ms) easily gets bottlenecked by a AMD card equal to GT 755m(AMD 8850M).
This is no surprise, considering their performance is less than half of a quad core i7.
I don't even consider the ULV anywhere when it comes to mobile gaming. ULV should be strictly avoided when buying a workstation meant for performance.
I have 3610QM , and when I play games like BF3 , Crysis 3 , etc the overall CPU utilization is almost close to 70% at peak , and when I go into multiplayer mode it crosses 85%.
Unfortunately , my GPU is kind of weak as per current market standards. I have to overclock it , to tap some additional benefits.
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In that case, would Nvidia optimus be suppoted? I won't need my SLI GPUs while coding, would I? So is Optimus supported in SLI configuration? And if yes, would it add to my battery life during non-gaming? (I'd be plugged into power while gaming for sure!)
And yes, I have already made a mind about not choosing GT740M, definitely a bottleneck as you guys have mentioned!
740, is weak GPU. At least as per current standards. Would suggest you to get at least 750m or better in GDDR5 configuration.
But before buying make sure you watch out for headroom for OC. Kepler cards are good at that so try to see if anyone is successfully able to drive that card to good results without hitting that temperature .