Which PSU would be better?



this what I currently have:
CPU: fx8320
GPU: Gigabyte Geforce gt740 2gb
Ram: 6gb
HDD: 2.5TB

And what im looking to upgrade in the future
Ram: to 8gb
GPU: Gigabyte GeForce GTX 970 Windforce 3X OC 4gb
 

I was just gonna run dual
 
Cause you now have 6GB (which is probably 1x6GB). If you add another 2GB then you will end up having RAM incompatibility issues. Your RAM sticks must always be identical in terms of performance in order to avoid downgrading to lowest speeds.
 


No thats no how i have it at the moment its 4GB+2GB thats why im thinking of getting 2x 4GB
 


Yeah that's what I would suggest you do. Buy a new set of ram sticks. Corsair vengeance, GSkill Ripjaws and Kingston Hyper X are the top brands, with Corsair being my favourite.