jimmysmitty :
msroadkill612 :
Given 5 year dev cycles, my guess is lane draining nvme took intel AND amd by surprise.
"That and NVMe are two of the main reasons EPYC has so many PCIe lanes."
I doubt NVMe took Intel by surprise considering that they were one of the main companies behind it:
http://www.bswd.com/FMS09/FMS09-T2A-Huffman.pdf
That PDF is from 2009 and from the original group that specified the NVMe spec, NVMHCI.
That led to the creating of NVM Express Organization which was more companies coming in to set the standard since they will be using it, similar things happen for USB and DRAM.
So again I doubt Intel was taken by surprise. AMD is possible though since I can't find any information of them being involved. They had to know something was coming. Everyone knew AHCI was not the best possible for SSDs and that a new standard would be coming just for SSDs. AHCI was mainly developed with SATA HDDs in mind as IDE was too slow to handle the better speeds.
Odd then there is currently ~NO affordable current desktop mobo with a lazy 8 pcie3 lanes free for a mere pair of nvme drives, assuming a 16 lane gpu in the system? Raid is out of the question w/o an expensive card & using only 8 lanes for gpu.
Some select intels are 28 pcie3 lane, some are 24, and some current models, just 16 lanes.
Ryzen is 24 usable on x370 chipset and 20 on x350.
Not prescient where i come from. Its missing the bleeding obvious. They need 4 lanes each!
"We knew how cool nvme would be, so we planned so u can only have one device on our systems"
Right
AMD happened to be targeting the server market where lanes matter for other reasons, and fabric made it easy for them to be generous in TR & Epyc. I fault them for being niggardly with AM4/ryzen.
I think many will opt for TR for the lanes, rather than the extra cores.
ps, i see i have contradicted myself ""That and NVMe are two of the main reasons EPYC has so many PCIe lanes.""
I retract that. More likely it was a fluke (as above) that serendipitously dovetails with these & other HB devices that are all the rage.
Its only IMO of course.