Hi 
Per title really. I don't want to lose any cores so am really looking at a second hand x99 5820k setup which for CPU/board/RAM is probably 350-400 on the MM, or a ryzen 1700 new which is more like 700 as id want the crosshair board.
Is the AMD worth the extra cash?
Also anyone know a source that compares IPC performance of my x5670 vs. 5820k vs. Ryzen?

Per title really. I don't want to lose any cores so am really looking at a second hand x99 5820k setup which for CPU/board/RAM is probably 350-400 on the MM, or a ryzen 1700 new which is more like 700 as id want the crosshair board.
Is the AMD worth the extra cash?
Also anyone know a source that compares IPC performance of my x5670 vs. 5820k vs. Ryzen?