|
GabryRox
|
 |
January 09, 2018, 11:18:41 PM |
|
Thanks for the replies guys and thanks for the info about the ONDA board, but the shipping and VAT most likely kills that idea unless she writes a low value for the customs. And I already went ahead and bought four pci-e risers. I was thinking about getting this mb, which lets me to expand up to 6 GPU's if needed. ASUS PRIME H270-PLUShttps://www.asus.com/Motherboards/PRIME-H270-PLUS/I have five of those boards and they work very well and are good value (at least in my location). You can expand it to 8 GPU using two M.2 to PCIE adapters ( these ones are cool because they connect directly to the riser usb) That said I recently setup my first riserless rig running linux off a usb stick and if you're expanding it might be worth the shipping + vat once you factor in buying a CPU, SSD, risers and time to set it up. Good to hear about some good Mobo alternatives. I've been mostly using ASRock H81 BTC Pro R2.0 with good success, but clearly need to get away from that LGA-1150 architecture as those EOL'd CPUs are getting very tough to find at reasonable prices. The 1151 for this board opens up a lot more reasonably priced options CPU-wise, I think i might pick up 1 or 2 of these if they really can support at least 6 GPUs. |
|
|
|
|
|
|
|
|
|
|
|
|
|
"If you don't want people to know you're a scumbag then don't be a scumbag." -- margaritahuyan
|
|
|
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction.
|
|
|
|
|
|
|
philipma1957 (OP)
Legendary
 Offline
Activity: 4116
Merit: 7872
'The right to privacy matters'
|
|
January 09, 2018, 11:34:45 PM |
|
I previously paid little attention to PCIE headers and ignored the fact that there are 1070ti models out there that operate on just one 8-pin (EVGA comes to mind).
As a result, I have build slightly inefficient rigs which have motherboards and PSU's capable of 8 devices, which can only power 5 * dual-pin, due to having a maximum of 10 PCIE headers from the PSU
Would it be dangerous to use an adapter that converts a single PCIE header into two? Specifically with 1070ti's operating at 106W?
My only other option would be to sell off a bunch of dual-pin 1070ti and buy the EVGA single pins to replace them. Or just build a new rig and re-arrange the lot to suit.
what is the psu in mind. some psu's have cables with 2x pcie heads. the high end corsair ax1200i ax1500i both can use single head 8 pin or dual head 8 pin and the dual head 8 pin sell on the corsair website so what are your psu's |
|
|
|
|
|
|
MagicSmoker
|
|
January 09, 2018, 11:59:44 PM |
|
Would it be dangerous to use an adapter that converts a single PCIE header into two? Specifically with 1070ti's operating at 106W?
EE here. If each 1070 Ti uses 106W then that is a total draw of about 18A from a single PCIe jack on the PSU. PCIe power uses the "Mini-Fit Jr" interconnect system with 3 wires dedicated to positive regardless of whether it is a 6 or 8 pin connector (that means either 3 or 5 pins are used for negative/ground). If quality Mini-Fit Jr connectors are used and the wires are crimped properly then even 18 AWG is more than sufficient to carry ~6A over the short distances involved here, but crappy connectors or crimps could get into trouble at a mere 1A. Fortunately, it's easy to tell if an interconnect is overloaded - it will get warm - so it really won't hurt to try out connecting 2 cards with a Y-adapter as long as you keep tabs on the temperature (particular at the interconnects - ie, plug and jack). How hot is too hot? Well, hard to say, but "bordering on uncomfortable after 5 seconds" is a reasonable guess. Some heating at the connectors - ie, a noticeable temperature rise, though not even remotely uncomfortable - is perfectly fine. |
|
|
|
|
QuintLeo
Legendary
Offline
Activity: 1498
Merit: 1030
|
|
January 10, 2018, 12:11:29 AM |
|
Hi guys,
I have ordered some ONDA B250 motherboards from Sidonia. Can you please tell me what's the distance between the PCIe slots? Will some AORUS 1080ti (5.5cm wide) fit well next to each other? Or do I have to use <=5 cm cards?
They might fit, but the cooling is going to be terrible due to the VERY LOW space between the fans and the back of the next card. |
I'm no longer legendary just in my own mind!
Like something I said? Donations gratefully accepted. LYLnTKvLefz9izJFUvEGQEZzSkz34b3N6U (Litecoin)
1GYbjMTPdCuV7dci3iCUiaRrcNuaiQrVYY (Bitcoin)
|
|
|
QuintLeo
Legendary
Offline
Activity: 1498
Merit: 1030
|
|
January 10, 2018, 12:12:33 AM |
|
Very informative thread, thanks guys.
I saw all your good feedbacks about riserless motherboards so I purchased 2 Onda 6 GPU boards from Alibaba. They work like a charm but i'm struggling keeping them inside a closed case with a low CFM fans, GPUs are heating too much.
I tried to use some spare Deltas 252 CFM fans, but I can't find in BIOS how to lower fan header voltage in order to decrease the RPM and consumption.
I don't want to keep them at 100% because of noise and don't think the motherboard can handle 3 fans at 3.9A each.
Any ideas?
just buy an external manual Fan regulator. it usually needs a 4 pol molex power smth like this https://www.amazon.com/HDE-Channel-Multi-Fan-Cooling-Controller/dp/B006UFMH3W/ref=sr_1_7?ie=UTF8&qid=1515507033&sr=8-7&keywords=fan+control+pcI know about these fan controllers but most of them can't handle more than 2A per fan header. There are adapters that will let you run a high-wattage fan from a MOLEX for +12VDC power with a second header for the PWM control and RPM sense functions. |
I'm no longer legendary just in my own mind!
Like something I said? Donations gratefully accepted. LYLnTKvLefz9izJFUvEGQEZzSkz34b3N6U (Litecoin)
1GYbjMTPdCuV7dci3iCUiaRrcNuaiQrVYY (Bitcoin)
|
|
|
bdiddle
Member
Offline
Activity: 75
Merit: 10
|
|
January 10, 2018, 12:25:07 AM |
|
So I think a Windows update broke ccminer on my Onda D1800.
Out of no where after a freeze and reboot I can't get my 6x 1060 rig mining with ccminer. All kinds of errors, including cpu_aes and some others.
Only thing I could think of was the Meltdown patch maybe borking something with the cpu.
I even completely installed new drivers and no change, ccminer wont work.
|
|
|
|
|
R0mi
Full Member
Offline
Activity: 305
Merit: 148
Theranos Coin - IoT + micro-blood arrays = Moon!
|
|
January 10, 2018, 01:29:44 AM |
|
I previously paid little attention to PCIE headers and ignored the fact that there are 1070ti models out there that operate on just one 8-pin (EVGA comes to mind).
As a result, I have build slightly inefficient rigs which have motherboards and PSU's capable of 8 devices, which can only power 5 * dual-pin, due to having a maximum of 10 PCIE headers from the PSU
Would it be dangerous to use an adapter that converts a single PCIE header into two? Specifically with 1070ti's operating at 106W?
My only other option would be to sell off a bunch of dual-pin 1070ti and buy the EVGA single pins to replace them. Or just build a new rig and re-arrange the lot to suit.
No, it is not if you keep the voltage to under 240w or so per GPU. |
Walton Chain CEO Mo' Bling: "Walton Chain will be the Qualcomm + Cisco in the blockchain industry, the ‘Google’ of the Blockchain." It's December 1999, do you know how your shitcoin holdings are doing? Magic 8 ball market analysis: www.doiownashitcoin.com |
|
|
|
martyroz
|
|
January 10, 2018, 01:36:22 AM |
|
So I'm looking at starting a conversion process to hybrid and here are my options locally;
$1299 ($1014 USD) for the 1080ti hybrid to give 700sols $1.86 per sol
$899 ($702 USD) for the 1070ti hybrid to give 500sols $1.80 per sol
$749 ($585 USD) for the 1070 hybrid to give 450sols $1.66 per sol
Call me crazy but I'm starting to like the look of 1070 hybrids. They are all grossly overpriced, but that's typical for Australia.
|
|
|
|
|
|
GabryRox
|
|
January 10, 2018, 02:18:46 AM |
|
So I'm looking at starting a conversion process to hybrid and here are my options locally;
$1299 ($1014 USD) for the 1080ti hybrid to give 700sols $1.86 per sol
$899 ($702 USD) for the 1070ti hybrid to give 500sols $1.80 per sol
$749 ($585 USD) for the 1070 hybrid to give 450sols $1.66 per sol
Call me crazy but I'm starting to like the look of 1070 hybrids. They are all grossly overpriced, but that's typical for Australia.
Might be typical for Oz but it's pretty much that bad or worse in US and rest of the world right now. Simply impossible to get a decent mining card at anywhere near retail, unless you happen to get onto a random stock up somewhere. I did this with both an MSI 570 8GB ($300 on newegg) and a 4GB (for $270) and moments after i ordered my 1 limit, they were gone, which defaulted to the 2x retail prices 3rd parties are selling them for. I really wonder if any big shipments of anything are in the works for the near future... I mean, how long has it been since Vega's were sold out... close to 2 months now? Just crazy! |
|
|
|
|
timeshifter
Newbie
Offline
Activity: 58
Merit: 0
|
|
January 10, 2018, 04:33:31 AM |
|
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer. I read through this writeup - thanks philipma1957 https://bitcointalk.org/index.php?topic=2192299.msg22020934#msg22020934I would buy / install: 30a 240v circuit with L6-30R plug PDU rated for 30 amps appropriate power cords I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers. Is this a good plan? |
|
|
|
|
|
VyprBTC
|
|
January 10, 2018, 04:43:06 AM |
|
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer. I read through this writeup - thanks philipma1957 https://bitcointalk.org/index.php?topic=2192299.msg22020934#msg22020934I would buy / install: 30a 240v circuit with L6-30R plug PDU rated for 30 amps appropriate power cords I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers. Is this a good plan? Either hire an electrician or wire it yourself if you know what you're doing. If you're going 220v and only have 2 breakers open you can only have 1 line - 220v is 2 hots and a ground so will take both those breaker slots. |
|
|
|
|
timeshifter
Newbie
Offline
Activity: 58
Merit: 0
|
|
January 10, 2018, 04:58:31 AM |
|
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer. I read through this writeup - thanks philipma1957 https://bitcointalk.org/index.php?topic=2192299.msg22020934#msg22020934I would buy / install: 30a 240v circuit with L6-30R plug PDU rated for 30 amps appropriate power cords I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers. Is this a good plan? Either hire an electrician or wire it yourself if you know what you're doing. If you're going 220v and only have 2 breakers open you can only have 1 line - 220v is 2 hots and a ground so will take both those breaker slots. Right, but 1 line at 220v with a PDU should easily power all that gear, right? |
|
|
|
|
|
VyprBTC
|
|
January 10, 2018, 05:02:18 AM |
|
Looking to power (4) rigs in my basement. Each one pulls about 1100 watts. Already have ATX power supplies that will take 240v or 120v. Was trying to figure out how to get enough 15 or 20 amp 120v circuits. But, I think going 240v is the answer. I read through this writeup - thanks philipma1957 https://bitcointalk.org/index.php?topic=2192299.msg22020934#msg22020934I would buy / install: 30a 240v circuit with L6-30R plug PDU rated for 30 amps appropriate power cords I think I have just enough space on my service panel to do this. Don't have room for more than two new breakers. Is this a good plan? Depends on how many watts your rigs are. if they're 6-700w sure. if they're >1kw draw each definitely not. Either hire an electrician or wire it yourself if you know what you're doing. If you're going 220v and only have 2 breakers open you can only have 1 line - 220v is 2 hots and a ground so will take both those breaker slots. Right, but 1 line at 220v with a PDU should easily power all that gear, right? |
|
|
|
|
|
VyprBTC
|
|
January 10, 2018, 05:03:54 AM |
|
I got the v1 D8P board.
In the other thread people were saying you guys are having RAM issues with these they don't like just your standard modules? I never ordered the brand everyone was suggesting, so guess if that's the case these won't get set up any time soon.
|
|
|
|
|
timeshifter
Newbie
Offline
Activity: 58
Merit: 0
|
|
January 10, 2018, 05:07:40 AM |
|
Depends on how many watts your rigs are. if they're 6-700w sure. if they're >1kw draw each definitely not.
4 rigs @1100 watts each = 4400 watts 220v @ 30 amps = 6600 watts 80% of 6600 watts = 5280 watts 5280 > 4400, so I should be good, right? |
|
|
|
|
|
VyprBTC
|
|
January 10, 2018, 05:11:41 AM |
|
Depends on how many watts your rigs are. if they're 6-700w sure. if they're >1kw draw each definitely not.
4 rigs @1100 watts each = 4400 watts 220v @ 30 amps = 6600 watts 80% of 6600 watts = 5280 watts 5280 > 4400, so I should be good, right? Duh. I was looking at the previous post about 15 and 20A, missed your 30A pdu addition. So yep, you'd be good. |
|
|
|
|
timeshifter
Newbie
Offline
Activity: 58
Merit: 0
|
|
January 10, 2018, 05:16:23 AM |
|
Depends on how many watts your rigs are. if they're 6-700w sure. if they're >1kw draw each definitely not.
4 rigs @1100 watts each = 4400 watts 220v @ 30 amps = 6600 watts 80% of 6600 watts = 5280 watts 5280 > 4400, so I should be good, right? Duh. I was looking at the previous post about 15 and 20A, missed your 30A pdu addition. So yep, you'd be good.  No problem, glad you're there keeping me thinking about this and gaining confidence. |
|
|
|
|
citronick
Legendary
Offline
Activity: 1834
Merit: 1080
---- winter*juvia -----
|
|
January 10, 2018, 05:45:16 AM |
|
Saw this recently - cointaxguide.com
Sharing this link for US miners. I think its 17 bucks to get the guide.
Don't apply to me because I outside the US
Great mining!
Btw, I manage to snag 10 x Zotac 1080ti MINI from my supplier because the original buyer defaulted on payments.
Had no complains taking the inventory -- I may have to bring back some rigs back home... the warehouse is really maxed out - no Amps left.
|
If I provided you good and useful info or just a smile to your day, consider sending me merit points to further validate this Bitcointalk account ~ useful for future account recovery...
|
|
|
|
VyprBTC
|
|
January 10, 2018, 05:50:02 AM |
|
Saw this recently - cointaxguide.com
Sharing this link for US miners. I think its 17 bucks to get the guide.
Don't apply to me because I outside the US
Great mining!
Btw, I manage to snag 10 x Zotac 1080ti MINI from my supplier because the original buyer defaulted on payments.
Had no complains taking the inventory -- I may have to bring back some rigs back home... the warehouse is really maxed out - no Amps left.
taxes? never heard of them. great snag on those 1080 ti's! |
|
|
|
|
|
