For beginning I must recommended for YOU full of review with description of the board:Asus-Rampage-V-Extreme-review-OC-and-some-fun-bonus, BIOS description etc...But for someone can be interesting only this part of overclocking...
Part with overOCng. For reminder, my cooling system is simply Noctua NHD14. I tested in AIDA stress test for 30min. I tried two combination. One with BCLK around 100 MHz and second with STRAP 125. I pushed memory clock to the higher clocks and cache clock also. Stabilize high cache, RAM and CPU is very stress for CPU overall, so with lower cache and decent RAMs you can get CPU frequency around +100 MHz higher.
Decent profile
I started at "decent" 4200 MHz. 1.22V was necessary for full stable of my retail piece, RAM 3200 MHz and cache 4 GHz. Load stress temps in AIDA stress test were between 75-80 C, not bad.
The best stable performance profile-named OC1 in graphs
It was very hard to get stable 4300 MHz, now I need 1.32V, power consumption jumping up (as you see later in graphs). Temps up to 93 C, small reserve is still here :). I tried 4200 MHz cache, but it was not full stable...
Second stable performance profile with 125BCLK strap and a bit lower cache and memory clocks-OC2 in graphs
For 4376 MHz I tried temperatures limits, but not why. Right overclocker must pushing to the limits sometimes :). Cache clocks was here 3876 MHz (is mistake in description note at printscreen) and RAM 3000 DDR4. I set cpu voltage to the 1.35V, for AIDA stress test hitted temps over 100C, yeah baby:D. This profile has similar average performance as OC1 with lower CPU clocks (but higher cache+memory). Sometimes is better, but lower cache and memory clocks are for some tests important...
old bench days-Cinebench R10, I started promote it for hwbot many years ago :)...
So time for graphs 


-the higher cache in OC1 profile and better RAMs means in memory tests clearly win.


-ufff, all modern chips are so quickly in wprime1024, but under 100s now with air?!

-Frtizchess test over 30k points? Wtf?! Where are the times when I was happy for 10k barrier
🙂

-Cinebenchs are so awesome for this monsters

-ideal CPU for x264 (and sure for x265 4k) video encoding
🙂

-Far Cry II is very sensitive for CPU (in lower resolutions specially). I had not tested 4960/3930K in this benchamrk and I do not bulid again this CPUs for only few tests...So for Far Cry II graph I changed these CPU for i7-3770K and FX-8350.
Power consumption for 5960X after OC is really big. Big chip, higher voltage= overheating, more current suply, need VRM active cooling. 390 Watts is without GPU load, so with GPU could be around 500W (270X-r9 now)

This is not all, later max benchmarks at air and we will se what happens with LN2 later :). Im afraid from old SF3D LN2 pot...Petri or Ryba, can me change old one for new one for free?:D
Who knows me, knows me ;)....AMD 3000+, AMD x2 4600+ EE, AMD X4 955 BE C2,2x AMD X4 965 BE C3, AMD X4 970 BE C3, AMD x4 975 BE, AMD x4 980 BE, AMD X6 1090T BE, AMD x6 1100T BE, 2x AMD FX-8120, 2x AMD FX-8150, FX-6300, FX-8300, FX-8320E, FX-8320, FX-8350, FX-8370, FX-8370E, FX-9370, FX-9590, AMD A8-3850, AMD A8-3870K, A8-5600K, A10-5800K, A10-6800K, A10-7850K, A10-7870K, A 5150, Athlon x4 860K, Intel i7-5960X, i7-6700K, Intel i7-4770K, Intel i7-980x, Intel i7 2600k, Intel i7-3770K, i7-3930K.