Worries about Alienware 18 Battlefield 4 performance. Should I buy one?

Yeah, without the scale, it is surely playable, but then that would not be max.
And now we have a direct way of trying to use more of the vram that everyone was so adamant about saying...can't be used.

Time to set up the multi display.

Edit:
Yes friends, it is really possible to get up to 4gb of video memory. So quit bashing 4 to 8 gb vram cards.
3.8gb in use for a 2550x1440P resolution.

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Yup, got that right. I'd say going forward that 4GB is the minimum anyone should find acceptable for a high performance gaming system. The days of 2GB being enough vRAM are over. Even tweaking old titles to improve them uses up 2GB of vRAM real quick. Having more than enough of everything is always the best approach in my view.

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just messed around with that res scale option and,looks like with a 4900mq and 780sli the best stable fps are at 140-145%. Jeez,I'm really curious on what gpu would handle that 200%.. also how many fps would be squeezed with a +125mhz overclock on the gpus?

 

Question, I thought the 8 gb per card could not be combined with the other to make 16gb in sli. Is that no longer the case and now the vram from both cards can be used ?

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The VRAM is used from both cards, yes. But it doesn't add up. It's just playing the game on two cards instead of one, like a mirrored image onto the second card.

 

leaving the alienware j.dre? I see your selling your beast

 

thats weird because i have 2 680s with 2 gb of vram, and when i check msi afterburner sometimes it says it uses over 2 gb... like 2044mb in battlefield 4.. how could it use that much if I only have 2 gb

 

2048MB is 2GB, so you had 4MB unused. And, even though you can't really stack vRAM with SLI, it might handle things a little bit differently than we expect.

 

Your gtx 780m SLI did 15 fps on max? Wow, I didn't expect that. I guess I'll be playing around %150. What's your fps when you play on %150? By the way have you tried playing with %200 res scale and turning off AA? Thanks.