any upgrades you guys recomend, i only use my pc for games like skyrim, battlefield, arma2 co and lots of mods
also looking for a good large case and some cooling
Are you having issues playing those games? Also at what resolution? Your system seems fine for all the above listed games at 1080p. But yes if you have the money, add a second 570. Also try overclocking your CPU to about 3.5-3.7, will need an aftermarket CPU cooler like EVO 212+, if you dont have one already.
Dont bother with liquid cooling unless you do a custom liquid cooling solution. The Corsair liquid coolers can maybe keep your CPU a few degrees cooler than an aftermarked air cooler like the CoolerMaster HyperN 212 Evo (which is what I would recommend). The biggest benefit of a liquid cooling system is less noise, and for me the price is not worth it.
For a memory upgrade, get a nice 2x4 GB RAM kit from G.Skill, Corsair, Kingston...
For an Intel rig, dont get Kingston RAM. The vast majority of them run at 1.65v, which modern Intel processors are not designed to handle. 1.65v RAM will void the warranty on the CPU, and over time will damage the internal memory controller. You need a kit that runs at 1.5v or less.
thanks for the help gonna get a gtx670 and the G.SKILL Ripjaws X Series 8GB
if i get the gtx670 can i use my 570 for lets say a second screen ?
and whats the diffrence with memory DDR3 1333 and DDR3 1600
The difference between 1333 MHz and 1600 MHz memory is just the speed at which it can perform operations. Its not a huge difference between the two, but for the $5 extra for the 1600 MHz its totally worth it.
Also, I wouldnt use your 570 as a second discreet graphics card. It will hinder the performance of the 670, plus if you want to add a second screen the 670 can easily handle that without a performance hit. Now if you were to run the 570 it as a dedicated PhysX card...maybe, but even then I wouldnt bother. Sell the 570 and recoup some of the money you spend on the 670.