1. Pic.3 & 4 are X58 MB made by unknown mfgr so called "山寨貨". only work with X5570 would easily beat by the current i3-6100 or even the older i3- 4160, why not go for uptodate i3 ? Forget this rubbish stuff, you won't regret !
2. PIC. 1 , this is 2-way workstation board. If you use 2 x X5650 (12C24T) would be equivalent to a X99 + 5820K, compare to perforemance with rendering and photoshop. With 2 x X5680 equivalent to X99 + 5960X... but double on power consumption & five years old stuff.
3. Pic. 2, this is a sever board (SSI EEB) not suitable use for a workstation.
With limited budget 4-5K (MB + CPU + RAM), 2-way 1366 with 2 x X5660 (better X5675) + 48G ram would be considerate for rendering but no AVX !
For AVX, E3-12xx would be the cheap and best CP. For heavy workload. Go for X99 + 5820K....