Quote Originally Posted by kurumi_Japan View Post
I have been buy over 50 pcs of X58 mobo, and select good IOH chip mobo for benching.

This IOH BCLK limitation does not different between vender to vender.
If you buy eVGA or GIGABYTE or ASUS, the result is same.
I think if you buy 5-6 same board, you can get good one.
This is IOH chip quality problems, not mobo design problems.

So please stop complain to vender.
I realize there's nothing wrong with the design. It's a great motherboard, but from what I've seen, they generally have trouble pushing high BCLK without QPI Slow Mode enabled. What I am saying is that I think for the high end boards, it would make sense for the IOH to be binned better. I accept that this might be asking for too much. It just seems unfortunate that I can have such a great chip and be held back by my board. I was able to push 230 on my old Gigabyte board. I can't get close to that on this one without QPISM enabled.