NVIDIA GeForce GTX 860M 2GB VS. 4GB (MAXWELL)

This topic doesn't seem to be covered anywhere and is a deciding factor for me in choosing a Y50 UHD with either 2G or 4G of vram. Hopefully some Y50 owners with IPS panels can shed some light on this subject.. been bugging me for weeks. The base model I'm considering has the following specs.

Lenovo Y50 UHD
Processor
4th Generation Intel Core i7-4710HQ Processor (2.50GHz 1600MHz 6MB)
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Display
15.6'' UHD LED Glossy (3840x2160)
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Graphics
NVIDIA GeForce GTX 860M 2GB
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Memory
8.0GB PC3-12800 DDR3L SDRAM 1600 MHz
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Hard Drive
Hybrid 1TB 5400 RPM+8GB SSHD
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So I can't decide on the NVIDIA GTX 860M with either 2GB or 4GB of vram, mainly because none of the retailers around here carry the UHD model and I've been relying on youtube vids and forum reviews which seems like a lot of hearsay. My question is how do the two compare in graphics/performance intensive tasks like gaming and programming besides the 4GB just being an additional 2GB of vram? In reference to overall performance with moderate gaming and everyday multitasking/development, is +2GB worth the extra $300?

Cheers!

 

The extra 2Gb of vram will, theoretically, give you the ability to render games at a much higher resolution; mainly above 1080p.
I don't think it's really worth it on a laptop (or this laptop). On a desktop, sure. This card isn't really capable of running a game in 4K on very good graphics settings, as that takes a much more powerful GPU.

I would say it's not worth it. It would be more worth it to get an 870m for $300, or 880m if you possibly could. (Obviously this laptop doesn't have an 870 or 880m model)

 

THIS makes sense, so even if I go with the 4K panel , the GPU isn't really capable of running a game in 4K regardless of whether or not I have an additional 2GB of vram. I'll be going with the 2GB then, thanks @Stuff_