QUOTE(maniacz013 @ Dec 6 2015, 01:37 PM)
if i want to buy the dell 7559 without win10, can i upgrade the RAM to 8GB as well? And how much would it cost? ty
Why not?
In fact, even if you buy with Windows 10, you can still upgrade the ram.
Doubt upgrading rams void warranty.
However, I would prefer 2 identical rams to be installed in my device rather than 2 different brands on ram

QUOTE(alien9 @ Dec 7 2015, 12:25 AM)
TS, quick question:
Inspiron 15-7559 > i5-6300HQ Q'core, GTX960m(4GB), 8GB, 1TB+8GB SSHD RM3999
VS
MSI PE60 6QE > i7-6700HQ, GTX960m(2GB), M2 PCIe slot RM4099
Which one is more preferable?
How big is the performance gap between the :
Graphic card > 4GB vs 2GB
Proc i5 vs i7
Extra M2 PCIe slot
*How much to upgrade the MSI from 4GB DDR4r to 8GB?
The more ram, it's usually better.
Open end games such as Witcher 3, Fallout and etc requires more vram compared to last year's triple A title.
i5 > i7, I think it's no brainer. i7 is always much better compared to i5 if both are in the same family generation.
Extra M.2 for SSD's = Very positive feature. Can easily add SSD without headache in the future.
FYI - Should strip the 7559 of that Hybrid and go full SSD if you are capable.