what to upgrade for 100 dollars

cnschub18

Prominent
Feb 19, 2017
3
0
510
Specs
i5 6500
zotac 1060 amp edition
MSI b150m pro-vd
1 TB samsung drive, 1 tb WD blue drive
NZXT s340
corsair h80i v2
500 watt psu
8 gb sport LT ram
Logitech g602 gaming mouse
eagletech mechanical keyboard
acer 1080p 60hz 27 inch monitor

With these specs I would like to know what I should upgrade or add to my setup, so please leave your suggestions.
 
Another 8GB ram
RGB lighting kit
Good headphone like Grado SR80e

Which power supply do you have? If its an local branded one, get a quality power supply unit first.
 



My motherboard only has two RAM slots
 

It's an HHD so i might get a 500 gb ssd for about 140 dollars or something.