Bitcoin Forum

Hello,

I have this motherboard and is working ok with 6 cards, but I have extra 5 cards and the prices of the motherboards that support 12/13 gpus are pretty high right now, so I bought an PCIE extension. The issue is that when I plug the risers in the multiplier, the cards are not detected, but if I plug an usb stick, it works fine. Is because of the motherboard?

MB:     https://rog.asus.com/uk/motherboards/rog-strix/rog-strix-b250f-gaming-model/
PCIE Multiplier: https://www.amazon.co.uk/gp/product/B0855QY46F

Thanks

The riser interface is not USB3.0 it uses the connectors and cables but is not usb..  so you want a card more like this...

https://www.amazon.com/YIYIYI-Expansion-Converter-Adatper-Bitcoin/dp/B08TWBDNPP/ref=sr_1_1?dchild=1&keywords=YIYIYI&qid=1614537907&sr=8-1

This will work with risers to gpus.  Note that your cpu pcie lanes, chipset,  other intefaces turned on in bios can all affect how many gpus you can actually get to recognize.  If your bios has above 4g decoding then chances are good you can run more....  Its a try and see thing most of the time.


But usb3.0 plugged into a riser would present problems as the usb 3.0 is not compatible and carries voltage where risrs using usb connector/cables pass no voltages only data.  Its just usb connectors and cables are cheap and reliable so used for this application also.

Running that much GPUS from a single PCIe slot? Naa I'd rather buy another motherboard or get three or four of this connector and use two/two cards on each connector, there are motherboards with 16x gpu space onboard though

Thanks, it has 4g decoding, and it detects 6 gpus. Would the below work, as on amazon they are all available from april at soonest here in UK ?

https://www.ebay.co.uk/itm/PCI-Express-1-to-4-Adapter-USB-3-0-Extender-Card-Mining-Accessory-4port-PCI-E/353395747777?_trkparms=ispr%3D1&hash=item5248072bc1:g:FTAAAOSwF-tgM2Dw&amdata=enc%3AAQAFAAACcBaobrjLl8XobRIiIML1V4Imu%252Fn%252BzU5L90Z278x5ickkWpEuxXwAiCNKyBQsQ5%252Fe64JkJJ%252FWwGPIbhbMy%252FetkUOR2LzdzPBI%252FGfyGXcAPmkse2tXoBygppeL8OHazhs%252B5%252BxfKcTMpy49aDxhESAzY49sY6Y1XJKgSIjbOjDVn1QxSt5v9XLW05KubxWvVw7TjwHd%252FbuhcknrVKhIGthRM1aRXnEyDxOadGHEJv8LHDKgug%252FnabCaU8BffFtawqMIxkDVj1KJt2DGb36vlXKIZu88Hq1E6SUW3TPVNyhgSMoAcSh8QomRIQ3dn%252F8I%252FGmLeeffZLfwfmE8LTH8okNBgxey2EjCk6Smneeg6m6Y6i%252FJdrBvE5CBd60lrq7UUs3bgs%252B7Z5vy77cJMUoZjRrb5xPc%252B6HMqEucPrNa6usupf%252BlFFCe7g0iM%252BIWBVhu3IuRULYNGtSfSiwtpD4sloXH5ZU3EUHGAAezd3yT9IDFQ8GI%252BpxeJWFjg7TODZ5nmK3U5fMhWM%252B0BZbg3ZLbApfOptVPRfbme6gTKyYq4f3pJGPTr4nhgS6jKqqkyUUVf65ndsicuLybWjMqeq9sqy%252Bl1OTBhiYt5YSiNvq%252FALapqWTceLzoPoa1llPT7XJqHYyj58h7uOB5BmiedVmcX1Pyxum63jsHBrNWyiEJOqmf%252FBIKiCnQvyGZ2kWgUhJg1dBg%252BSBJNKV6SqaMKj5q6TbofHdLpSuh1IG9lVVioagF%252B99cx91pdFoV0smN4myNETiLeNFOKzrbPNKDsr%252BjPIIAR1w9Qf0KllwPqpzE7ukC6l1mqf2Aw%252FBfNzE9khDC9pLJYg%253D%253D%7Ccksum%3A353395747777e0a0f7b30c7045b2bf899e9e654853e5%7Campid%3APL_CLK%7Cclp%3A2334524

Yeah thats same multiplexer.  And they are inexpensive.  Recently ive had to use several on rig where gpu0 had to be in slot but the other gpu slots where blocked.  i just toss it into an unobstructed slot and plug in the gpus on risers.  Ive had a cou0le boards that wouldnt go beyond 6 gpus but others do...depends on chipset / cpu pcie lanes / m.2 utilized ports etc.

Good luck and let us know if it works for ya.

I'm planning to buy 3 of them and to use 3 cards max on each, but first I need to know if they would work.

Thanks miner29, I've just ordered them. I'll let you know if they work. Unfortunatelly, I don't know if I can or  how to give you merit. :D

When i have chained them off each other ive stepped up to a better multiplexer chip.  SQRL X2G is very good chip but way more exspensive.  But if you are going to run just one in a slot not chaining one off the other then the cheaper option is fine. 

I suggest starting with one and adding a gpu at a time and get it running.  This way you can figure out what the limit is. 

No worries on the merit man.  Just hope it helps ya.  One miner to another. 👍

They have arrived today, and they work. So now, my mb, which has only 6 pcie slots, works with 12 cards. Thanks again @miner29!!

Excellent...some folks dont understand x1 is good for almost every gpu mining application.  The only one i know its not great for is the lolminer Super Zombie Mode for 4gb card in x16 slot (or even x8).  And that situation will eventually go away.

And doing that little plex card is way cheaper than adding a whole second rig. 

Hash on 👍

what cpu are u using?
i cant believe u got 12 cards working
u should only be able to get 7 working
if u can get 12 i want to try and mimic with my tb250 btc
are they all nvidia or amd cards?

The cpu is i3, they are all 3060ti or 3070s. I've got 2 multiplier with 4 ports each, to see if they work, and today I've ordered another 2, because I'd like to use 1 multiplier for 2 cards, to make it last longer.

Using all 4 ports doesnt cause any issue for the plex chip its designed to do it.  You will eventually run out of PCIE lanes so dont think you will just keep adding and adding.  There are some chipset limitations as well.  But 12-13 seems doable.....maybe more depends what else is enabled.  M.2 ports can use up lanes..and chipset and implementations can affect this.  But the little splitter is quite affordable.  Just make sure to get the one with heat sink as the plx chip does generate heat and is sensative to it.  The nicer ones i referenced above have actual fans on the plx chip and its a much more expensive and capable plx chip. 

PCIE is quite impressive when you consider all that it handles....effortlessly. 

Ive yet to have a plx fail on me.  I have had a doa but not one actually fail from use....there arent any moving parts on it and silicon doesnt wear out..again no moving parts.

lol its pcie to usb 3.0 not pcie multiplier for pcie, you cannot use this for pcie riser, you're wrong bought this stuff, pcie multiplier quite expensive around 1/3 from mobo that has 12 pcie, so i think better you sell the mobo and buy new one with 12+ pcie and not causing any problem in the future

Well, I've bought it for 18 pounds, and currently a h110 pro btc is around 250-300 pounds, so is way less expensive to buy the multiplier.

So, I imagine that you insert the multiplier in the PCI "long" slot that does carry 16x ?

Currently I have  2 multipliers, inserted in the last 2 slots, they are short slots.

Works in any pcie slot even x1 shorties....

You couldnt be more incorrect if you tried.

Go look at 12 gpu mining board.  Now if available most are $300+
The little plx is $20-30 bepending on where tou get it from. 
Oh and they work...probably outta look at that too. 

The only part you got right was the USB3.0 part but i corrected OP and advised him on that as well.  Anyways i wont rag on ya...hell ive skipped through threads and made a heel of myselfe before as well 😂

I received them yesterday, but windows isn't recognizing them.
It does appear the "triangle" in the device panel.
I am trying to find the driver over the net with no luck.

Can someone that is successfully using the multiplier tell me the name of the driver he is sing ? 

I've got the one above, the ebay link, and it worked straight forward, without having to install a driver.

That's because windows found the driver and install it without askying you.
Neverless the driver has been  installed and you can see it in the same place where you go and see if the VIdeo card driver are installed its under : other devices(that's where I have it)  or its under system devices, where the other PCI devices are(you , that's working)

Actually PLX boards dont need a driver...thats why they work with all OS's.....the PCIe subsystem directly supports this...no driver needed for the board...even in windows.

Most motherboards wont yield you 6 extra card slots...

Many of the 6 slot 2016/2017 mining boards wont give you any extra, some will give you 1 extra.

I know for example z270 MSI boards give you 2 extra (you lose the onboard video tho).

I think it comes down to the bios and chipset. Just don't expect to expand every board you have.