topic Re: 750 series SSD performance on CPU, or PCH PCI-E in Solid State Drives (NAND)

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

CBark1 — Fri, 20 Nov 2015 02:26:20 GMT

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.

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

ASouz7 — Fri, 20 Nov 2015 21:25:30 GMT

Hello cmatt85,

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

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

AP16 — Fri, 20 Nov 2015 21:31:02 GMT

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.

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

CBark1 — Sat, 21 Nov 2015 01:02:16 GMT

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.

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

AP16 — Sat, 21 Nov 2015 13:46:00 GMT

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.

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

NMICH1 — Sat, 27 Aug 2016 19:23:35 GMT

They test out both here (on a samsung drive, not an intel one) :

http://www.myce.com/review/native-z170-hyper-m-2-vs-pcie3-m-2-77791/ Native Z170 Hyper M.2 vs PCIe3 M.2 - Myce.com

and find no difference.