Quote Originally Posted by SF3D View Post
What are you talking mate

QPI is Quick path interconnect speed. It is marked as GT/s Gigatransfers per second. You see this value in CPU-Z front page "QPI link" At stock speed it is saying ~3200MHz, when it should say 6400GT/s(2x3200GT/s). When you raise BCLK this value will raise too and with lowest QPI multiplier (36x) it will go up to ~8000GT/s before it locks. Now if we would have lower multipliers than 36x we could get our BCLK higher before that ~8000GT/s limit.

If you remember AMD 64 days and 1X to 5X HT multipliers, you will see what this issue is. Back then you had to lower HT multiplier to 4X or 3X to get your HT speed up to 200 to 250.

After all this processor is designed for servers and these really high QPI speeds were not what they had in mind. Maybe this will be fixed with new chipsets or 1160 processors. If QPI multipliers on X58/core i7 are limited to 36x on hardware level, there is nothing we can do. Just LN2 to CPU and Chipset and we might see some scaling

Are we on the same page now
I quote myslef

I got answer to my question about hardware level limits. QPI multipliers are locked in CPU's registry, so there is no way to unlock them. That would mean higher BCLK clocks, but then the difference between basic and extreme edition cpu's would be thinner. Intel don't like that of course.

This case is clear for me now

Bad news for 920/940 overclockers