Both asus z270-a + 1 cheap china m.2 adapter and asus z270-p + 2x m.2 adapters work flawlessly with any 8 nvidia gpus.
So I had all the reasons to expect they will work with the VEGA gpus too. The asus z270-a is no go, but I did manage to get 8 vega gpus after 2 days of trials on a z270-p. I think the secret was not updating the motherboard bios/uefi (I used the one that came with it out of the box). On another z270-p I could only get 7 cards to work, the 8th always had problems or not being recognised at all. Very strange.

I can't return any motherboards, but I can return the ones I will get in the future to test.. like the 13 slot pro btc mobo.
Very little info out there regarding 8 VEGA gpus on a rig. Hope this helps someone. Z270-P works.

Hi. So I bought 8 vega 56 to make a rig, thinking it would be no different than a 1080ti rig.
I can only get 5 cards to work on asus z270-a, the rest are not recognised, and sometimes a 6th comes up with problems in device manager only disappear at the next reboot. very strange.

Do you know what motherboard/driver etc can get 6+ cards running on windows ?

On linux I couldn't even boot with more than 3 cards, it would give me some pci express errors.

Also, what miner works with vega on linux with the 17.40 + rocm drivers ? or is there any way to enable old opencl for vega ?

Please advise. thanks.

Does anyone know if you can set gpu/memory clock directly from the miner in linux with amdgpu-pro ? What about undervolt in Linux ?
And why do my rx 480 rigs reset themselves in linux after a few minutes of mining, but the rx 470 work fine ? very strange.

I have a question about the Linux miner.
I did a fresh install of Lubuntu 16.04 and updated all the packages.
then I installed the 16.50 amdgpu-pro driver from the amd site. everything worked perfectly.
but after a few minutes of mining my 6x rx 480 8gb nitro rig restarts by itself.
I tried this on two rigs, with both 9.3 and 10 versions. One had modded timings (with little effect) and the other one was stock bios. both psus are 1200w, good quality.
What could be the problem ? (don't have this behaviour on windows 10)

waiting to hear the results.

Really it's a more like a for-fun project, to get things a bit to the extreme, although it should pretty much lower my ROI or keep it the same, not increase it (i will save the cost of 3 mobos, 3 cpus, no ram (will use 16gb on it), and the cost of about 2 psus - although an x99 mobo + cpu is a lot more expensive, it will be actually easier to resell one of those at good value than four  crappy h81 btc pro and celerons which nobody will want except at shit prices when mining will be very little profitable for most people and the markets will be full of second hand mining hardware)
I will use a 2450w psu to power the pci connectors of the 28 cards i will use (7 slots x 4 slots per spliiter, already have the psu online). Right now they are mining on 4 rigs with 7 slot mobo each. I got the server psu for $55 including shipping. and the connectors cost like $20, cables another $20 and a friend soldered them for free. so $95 for a 2450w psus is not bad. And for the risers I will use either a 2000w  computer psu or two 1200watt ones which I already have.
I am not sure how many amd gpus can windows use with the amd drivers, but I think there is no limit on linux and claymore's support 32 gpu as far as I know. Or was that 16?
The only concern would be stability, if one card crashes it could hang the whole system.
So please, if anyone has any info on more than 8 gpu on one system.. please enlighten me, what motherboard would be best?

I am planning on building a mining rig with more than 8 gpus. I've bought 1 to 4 pci express splitters but I had no luck getting the motherboards to boot with more gpus than the number of its actual physical pcie ports. (tried z87, h97, h81, b150). The person who sold these to me said he heard ASROCK X99 EXTREME supports up to 32 GPUS.
Now I've seen somewhere on the ethereum dual miner thread that somebody managed to use around 18?, i think, amd cards on linux, but I cannot find that post anymore.
Anyone have any info on this? Will a motherboard with X79 chipset be just as good, as they have the same number of lanes? Or it depends more on the bios ?They are rather expensive and I want to hear some opinions before I throw my money.

I am trying to switch from putting options in start.bat file in config.txt file, for easier remote administration of the configs. But I have one problem. How do I keep each worker name unique for pool monitoring while sending the same config.txt to miners from EthMan ? Is there some option to keep worker name unique, separate of config.txt?
IF the answer is no, then I suggest to claymore that he should have an option to start the miner with a -workername paramater in start.bat and maybe put an alias variable in the config.txt like $worker, which the miner replaces wherever it finds with the worker name, so it could work for both coins minerd.

yes i did miss it, thanks claymore. gpus are 6x rx480 8gb, 16.7.3 drivers, windows 10 anniversary, cheapeste celeron cpu. will wait for the next versions then. this only happens with the rx 480, no other older cards.

Anyone have any idea why it takes 40-80 seconds for claymore to begin generating DAG on my rx 480 rigs with windows 10 ? this delay happens on all of them. have the latest stable driver (not hotfix, which causes a bit lower performance).

Claymore, how about adding a mirror with direct http links with easy to remember file names ? (for easy downloading with wget on linux)

Thank you claymore, you're the best. I only wished you would open source ethman so we can make it a lot better.

what is a POS tablet?


I tried that, it's not because console scrolling is stuck. It's something else. Seems very random sometimes.

is it a known issue with rx 480 8gb  that it takes 60-90 seconds after showing "POOL/SOLO version" for the miner to proceed to DAG generation?
happens on all my 4 rigs with windows 7/windows 10

I am telling you that is EXACTLY the problem. It is a normal speed for hd 7990, it got slower over time mining ETH due to the dag file size increase. I had one and it had the exact same speed. You can use ethminer and see 50mh if it makes you feel better.

for Claymore: Please add a mirror for your builds that is ftp-like and wget-able ? and with a predictable naming.
So I can do wget http://mirrorsite.com/claymore71.tar.gz
It's very annoying on headless system to download your miner. have to put in on usb, make a local webserver to share it, etc. Links text browser doesn't work with google and mega.

Because claymore reports the hash rate accurately.

I decided I want to try solo mining with my rigs. Can somebody tell me what eth node is recommended, geth or parity ? And what proxy should I use for it that will work with claymore ? Or do I just point claymore's miner to local node address and everything will be fine/optimal ?

Hi, thanks for bothering to reply.
I am using an arch linux based distro but without X running (headless).
I know it's easy when you have autologin and X running..

I have a few questions regarding the Linux version:
- Is coloured text in the terminal possible? If so, how?
- How would I run the miner at system startup as user, inside screen ?
- For Claymore, can you build with a newer libcurl version so I don't have to install the libcurl-compat package ?
- Is temp/fan monitoring/change possible with AMDGPU driver ? If yes, does it require X to be running ?

Maybe Claymore or someone else can clear this up for me.