Aaaand – another big shout-out for one of my readers: “somebody” (and I can’t for the life of me find the comment to figure out who it was…) recently mentioned he’d gotten his Phi card to work in an Asrock H110 Pro BTC+ board, and with a riser to boot … and since in my last post re the Z170A desktop boards I had explicitly mentioned that I had unsuccessfully tried both this board and some PCIe riser cables (also in the Z170 boards) I at first found this a bit incredible. However, he also sent me a picture, so apparently I must have done something wrong last week, and decided to re-do that experiment… and lo and behold, it does indeed work…. Hm. Oh well.
First, I looked up what I had actually written about the H110BTC board – and turns out I had never actually said that it didn’t work with the cards, I had only said it didn’t boot, and that I suspected that it was DoA – but after re-assembling it again it actually booted up just fine. Maybe I didn’t have the board’s external power connectors in correctly last week (the H110’s have these weird external SATA power cable connectors to power the PCIe slots), or maybe I had simply forgotten to put in the memory (not the first time – I keep forgetting that non-Phi CPUs do need memory :-/), but either way, the board without any cards booted up just fine.
Second, I dug out my PCI1 1x-to-16x riser cables I had recently gotten on ebay, hooked it up to a 7220A card, plugged in a lukStick, and indeed, it booted up just fine. First time the system didn’t properly boot the card (0xff mic status in the dmesg, and “error” status in “micctrl -s”), but by that time the card had already shown up on the PCI bus (“lspci | grep Device”), the kernel module has already loaded, and “micctrl” already showed that there was a card in the system – so that was a good sign. Rebooted again, went into the BIOS, and changed a few settings – in particular, I set the PCIe speeds from “auto” to the highest the boards offerened (Gen2 for some, Gen3 for others!?), and forced primary graphics to “on board” (above 4GB decoding was already on), and rebooted … and la-voila, it booted up like a charm, with riser cable that I had claimed wouldn’t work with those cards, and everything. Duh. Either way, here two pics of the “final” rig – maybe not the most professional rig, but all I could do between “getting up” and “getting my coffee”….
Bottom line: Unlike what I may have said in previous articles and replies to comments: The H110 Pro BTC+ board apparently does work with the 7220A card (at least, with one – I haven’t tried more, yet), and the 7220A works with PCIe 1x-to-16x risers (at least in this board – haven’t tried in other boards, yet).
With that – happy mining…
PS: Of course, the main reason for using riser cables is to use more than one card, which I haven’t tested yet. I’ll post info on that as soon as I find the time to run that.