Will A 15.6 Inch Laptop Fit In A 15.4 Inch Backpack?

I know this is a very silly question, but I think 0.2 of an inch is very small. It probably would be the difference of fitting a laptop, but oh well.

http://www.amazon.com/...merReviews

That's the laptop backpack. It's the Lowepro Fastpack 250. Really cheap DSLR backpack. Unfortunately, I have a 15.6 inch laptop, the Lenovo Y500. It's like an inch in width and it has 2 GPUs. So will it fit?

Yes, it'll certainly fit. The difference between 15.4 and 15.6 is very small. If it won't fit you could always stretch the zipper a bit. I'm confident that your laptop will fit comfortably and securely in that backpack. Nice choice by the way. Hope this helps and Merry Christmas!