Nice! I'm running my W3680 at 4.2ghz 28*150 @ 1.28v. The W3680 and 980x are essentially the same chip. 1800mhz 8-9-8-24.
You cant buy and good ddr3 ram anymore with good timings, the old ram i had was 1600Mhz 6-8-6-24 6*2GB that would overclock great but i needed more then 12GB. The few kits i could find were 1600Mhz 9-9-9-24 6*4GB or the kit i bought 2133Mhz 11-13-13-31 which is now running at 1840Mhz 10-11-11-24.
Ive now managed to get the a 4.45Ghz 29*153 @ 1.318v, with the jump from 152 to 153 i had to bump the ram to a CL10. Cl9 must have been really close to failing on 152 block, everything seemed just slightly sluggish. Once i moved to block 153 and cl10 everything became very snappy.
So far im very happy with the 980x it seems to be happy with a 4.45Ghz OC and with a 50% load bounced around 45-51*c will have to see if i can match my 950's 4.62Ghz OC
RAM prices in general have just gone through the roof and left a lot of older DDR3 modules out of stock. I got lucky and picked up 4gb sticks of KLEVV Genuine memory when Newegg was trying to clear them out. I also have some 8gb sticks of the Crucial Low Profile/Low Voltage memory that overclocks great... Honestly this is the best RAM you can get for X58;
Crucial Ballistix Tactical Low Profile - BLT8G3D1608ET3LX0
Comes in 1x8gb, 2x8gb and 4x8gb options but if you can find any of these for a decent price they're a great buy.