http://www.amazon.com/Acer-E5-573G-15-6-Inch-GeForce-Windows/dp/B012IBOCRU/ref=sr_1_6?s=pc&ie=UTF8&qid=1463644131&sr=1-6&keywords=gaming+laptop good deal for 600$ take a look
http://www.amazon.com/gp/aw/d/B01CGGOUJM/ref=mp_s_a_1_6?qid=1463537349&sr=8-6&pi=AC_SX236_SY340_FMwebp_QL65&keywords=laptop&dpPl=1&dpID=51rDLb7i7RL&ref=plSrch take a look
take alook at this http://www.amazon.com/G751JY-17-Inch-Gaming-Laptop-model/dp/B015QZPRW4/ref=sr_1_1?ie=UTF8&qid=1463462535&sr=8-1&keywords=ASUS+ROG+G751JY-WH71%28WX%29+17-Inch
Hold home button,power button and volume down for some time , then you will get a message then press volume up...this will show boot menu if this doesn't work try using Odin(Google it)
Take a look at this http://www.amazon.com/MSI-GE62-Apache-Pro-239-i7-6700HQ/dp/B01D8VJ0B2/ref=sr_1_7?s=electronics&ie=UTF8&qid=1463300557&sr=1-7&keywords=msi+gaming+laptop
Better than what you consider
You will get the same specs but with a 970m on a same price
http://www.amazon.com/MSI-GE62-Apache-Pro-239-i7-6700HQ/dp/B01D8VJ0B2/ref=sr_1_6?s=electronics&ie=UTF8&qid=1463119941&sr=1-6&keywords=msi+gaming+laptop.....or you could go with this...