750 series SSD performance on CPU, or PCH PCI-E

[CBark1]

Where can I find more data comparing the performance of an Intel 750 series ssd (1.2TB HHHL) operating on native PCI-E lanes from the CPU vs PCH supplied lanes. I'll be using a 6700K on a Z170 chipset motherboard. I am trying to determine the penalties caused by the DMI bottleneck, and if it warrants the upgrade to an X99 board.

[ASouz7]

Hello cmatt85,

We are going to check on this and will advise as soon as possible.

[AP16]

The DMI 3.0 link between PCH and CPU is equivalent of PCIE 3.0 4x slot. If you don`t use SATA SSD/multiple HDDs, and home network connection is not a Gigabit (or not utilized with more than 100 Mbit/s actual speeds), you have no USB 3.0 storages - performance hit should be negligible in comparison with CPU-provided lanes.

[CBark1]

I'm running a video server with multiple 4k streams that is very sensitive to latency spikes, and I'm wondering if the DMI link may introduce performance inconsistencies. I may just have to buy both and test it out.

[AP16]

I find no actual measures of current Intel PCHs latency, but old chipsets some times impose up to 1000 ns delay for PCIE transfers, so yes, you better take a look on X99 platform.