So my hard drives in my x58 system died about a month ago.  I was thinking of just getting some new ssd's for it and a 980 to replace my 580. Will my x58 give me full advantage of the 980's power or will my x58 system slow it down. I also was thinking of building a new system like a z97 or even a x99 sytem since my x58 is showing its age. I use this pc for gaming and love all the eye candy but I'm also only using a 1080p monitor. At some point I would like to get a 4k monitor . Any thoughts ?

My old system is my HTPC and it is a 950 oc'd to 3.8 and previously had 2xGTX 460s. Way too much noise for an HTPC so when I built my new PC early this month, I went ahead and splurged for an additional 970 to swap into it as well.  It screams.

Coming from someone with an X58 and a pair of 980's, you will see some bottlenecking with that setup.  I have my 920 up to 4.4ghz, and there's still bottlenecking present.  It's possible that there may be a difference with the six-core varieties of the the socket 1366 processors, but there will be some bit of a slowdown with a four-core.  Now, regardless of the bottlenecking, there's still a vast and noticeable improvement over the 580's, so any amount of bottlenecking shouldn't put you off from upgrading.

Thanks for the info guys. I'm think as long as I'm in a spending mood might as well build a new rig for the 980's 

GoldenShadow
My i7 920 bottlenecked my GTX 970. I built a new rig with Z97 and i5 4690K, its much quicker.

I'm going with a new Z97 rig also. Will be using a i7 4970 . I think I'll be happy