Thank you taikor 
Btw, does it have connection in overclocking? Should leave default or better at disable?

sorry wasnt following the thread.

dont get what ure saying

Intel MEI/ME is a driver thing afaik to control cpu functions. without it overclocks wont work in windows afaik. although since p67 mobo manufactorers found a away around it with uefi etc.

Heh, Im asking if this got to do with overclocking, & seems your answer is yes
2nd, Im asking if the MEI/ ME got option to disable or enable

eh disable. can lar. go to service and disable lol.

Owh, one more thing
I cant fix my Bus Speed to 100 even I put manual value & Spread Spectrum Disable
Is that common for Asrock board?

The Z87 KILLER FATAL1TY also runs its BCLK a bit shy of 100MHz, so you will see some slightly reduced clocks when you check those.

What is pointed out above, which is not much, is basically all the "issues" I had with this motherboard.

The OS and driver install were near perfect as noted. It worked exactly as it should and never gave me an issue with BIOS changes or hot-swapping data drives.

Related: http://www.hardocp.com/article/2014/01/29/.../7#.UvO8hLSgh9Y
A temporary "fix" is by setting the BCLK one notch higher than 100MHz such as 100.1 or 100.2 etc.
My Z87 OCF doesn't have this issue though. 

Thanks for the tips but is that possible to set the value by 0.1 increment?
I cant test right now coz working, might check up later   

Wow w0ot?! Such nice review almost cannot believe what exactly this board could offers   

I don't have the board so no idea. But it seems like you have fixed it already with that BCLK @ 100.15MHz 

owikh84
Ive read over the net, few forum regarding OC not recommended Prime95 for Haswell as they mention Prime95 gone really beyond the limits
They suggesting AIDA64 as it were optimized for Haswell

Wht dya think?

Yes, I have heard of that too but won't take it as a good direction.
As for me, what's the point of using a second most stressful app if there's already a better one on top of it.

So how bout IBT? It seems that IBT further extreme compared to Prime95
Example, at same setting, my rig fails stressed with Prime at 40 minutes
But for IBT, it seems much faster, at 7th round it BSOD   

Prime is more into power consumption?
That means it stress the PSU as well?
Is your rig passed the Linpack 11?

Ahh ic, in my situation, when I ran IBT, setup 43x100 it could passed
But when I increase the multi to 44x100, it crashed/ BSOD, both are same vCore
This mean I need to increase the voltage right? Btw, does the cache multi affecting our OC stability??

0x101 = increase vcore
0x124 = increase/decrease vcore or QPI/VTT... have to test to see which one it is
0x0A = unstable RAM/IMC, increase QPI first, if that doesn't work increase vcore
0x1E = increase vcore
0x3B = increase vcore
0x3D = increase vcore
0xD1 = QPI/VTT, increase/decrease as necessary, can also be unstable Ram, raise Ram voltage
0x9C = QPI/VTT most likely, but increasing vcore has helped in some instances
0x50 = RAM timings/Frequency or uncore multi unstable, increase RAM voltage or adjust QPI/VTT, or lower uncore if you're higher than 2x
0x109 = Not enough or too Much memory voltage
0x116 = Low IOH (NB) voltage, GPU issue (most common when running multi-GPU/overclocking GPU)
0x7E = Corrupted OS file, possibly from overclocking. Run sfc /scannow and chkdsk /r

Running CPU Cache Ratio faster than processor core frequency does not show any performance gains so we recommend staying in sync with the CPU ratio or within 300MHz (lower than CPU frequency).