i3820: 131 Mhz too much BCLK?

On my Asrock Extreme 4 x79, I have the (host clock override) BCLK set to 131 Mhz and my multiplier set to 35x for a CPU speed of 4585. I've read overclocking the FSB by ~6Mhz can be problematic on LGA2011, so I going to far by pushing it from 125Mhz to 131Mhz?

Does BCLK affect the PCI bus and PCIe bus speeds as well? Or are we back to the bad old days when bus speeds were tied to CPU clk speed?

Just for the record, I managed to stabilize this overclock by upping the PCH 1.5 Voltage to 1.55V from 1.5V. However I'd still like to know
what the BCLK limits are for an LGA2011 (i.e. how far can you push BCLK from the standard base clock settings of 100 Mhz, 125 Mhz and 166 Mhz).

Bclk = PCI-E clock but with x1.00, x1.25 or x1.67 strap. It may affect stability of other parts in your PC. Like some SATA controllers won't work above even 103MHz.
On 2011 best is to set +5MHz from each strap so 100-105MHz, 125-130MHz, 167-172MHz. There is chance to make it run stable above that but in most cases or board or some other parts are showing some instability.
IB-E are running higher and I can set 100% stable 188MHz bclk on my 4930K, and 190MHz max for benchmarks ... what is weird, 191 is not booting at all