Need help with my computer specs (RAM)

[SiKz__]

I currently have one 2GB stick and one 4GB stick (6GB in total) on slots #1 and #3, 798.1 MHz DRAM Frequency (on CPU-Z)
I don't think it's enough for gaming and I'm thinking about getting more ram, what should I get? Please leave suggestions in the comments.
Motherboard: ASUSTeK COMPUTER INC. M51AC
GPU: AMD Randeon R9 270X 2GB
CPU: i5 4430S 2.7 GHz (3.2 with turbo)

 

[Luminary]

From your PC spec page:

Dual Channel, DDR3 at 1600MHz
4 x DIMMs

I recommend either putting in a new pair of 4GB sticks to get you up to 8GB (still perfectly good for most games). If you want to go all the way up to 16GB then your PC can certainly handle two sticks of 8GB. Below I've listed two good choices for both 8GB and 16GB packs:

Memory: Kingston HyperX Fury Black 8GB (2 x 4GB) DDR3-1600 Memory ($40.56 @ NCIX US)
Total: $40.56
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-01 10:14 EDT-0400

Memory: Crucial Ballistix Sport 16GB (2 x 8GB) DDR3-1600 Memory ($79.99 @ Newegg)
Total: $79.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-01 10:16 EDT-0400

You could spend a bit more on fancier RAM heatsinks and slightly faster CAS speeds, but overall the modules I've listed above are great performers at a reasonable price. No matter what I highly recommend only using two modules, as it will create less stress for your memory controller.

Footnote-Edit: When you put your new RAM in don't try mixing it with what you already have. There is only about a 50/50 chance any type of mixed RAM will work together and it has the chance of causing instability on your system.

 

[SiKz__]

Thanks a lot!

 

[Luminary]

You're most welcome, cheers.