Topic: EZ 6x 1080 TI GPU Mining Rig Build 4400 Sols / 1 PSU (Read 1618 times)

this is an excellent post // yes it is unless its been changed at some point

Most cards with 2 PCI-E power connectors won't run AT ALL with only 1 connector attached.
I have heard of exceptions, but never SEEN one to date.

 The issue with using SATA to power risers is that the PCI-E bus is specified to allow up to 75 watts power draw from the GPU, then the riser ITSELF has to do "voltage conversion" to run that 75 watts from a +12VDC only feed which will eat a few watts as well, while the SATA power connector ITSELF is only rated to provide 54 watts MAX at +12VDC.

 There is no way to guarentee how much of it's power a given GPU will draw from the PCI-E power connector(s) and how much it will draw from the bus, so there is a definite risk of overloading that SATA power connector by powering a riser with one.
 If the card splits the power draw so that it's pulling less than 50 watts or so from the PCI-E bus then it will work reliably - but there is NO WAY to make the card do that for SURE unless it's a low power card that draws ALL of it's power from the PCI-E bus (most 1050ti and lower) and you turn the total card TDP down to 50 watts or less.

 This is not an issue for MOLEX (150+ watt rated power connector) or PCI-E (192+ watt rating on the connector, even though PCI-E spec says 75 they WAY underrate the connector).

 I have not worked with Corsair modular power supplies, but most power supply manufacturers design their "peripheral" and "sata" ports on the PS to be interchangeable - might be worth checking to see if you can run Molex from all of those ports on your Corsair.
 It definitely works on the Corsair AX860/AX760 but those are Seasonic-built Corsair variants on the Seasonic SS-860/SS-760 models and most Corsair PS models are manufactured by companies other than Seasonic.

 Isn't the Zotac 1080 ti Extreme a "8 + 8" powered card?

I have a question. In your video you use VGA (8PIN) in PSU, and then 8pin+6pin in the GPU. (1 cable pr. GPU).
I'm having problems with a Zotac 1080 ti extreme. (6x GPU + 2x 1000W psu Corsair HX1000i)

GPU powered like this:
GPU --> (6+2pin + 8 pin) --> VGA (8PIN) in PSU (1 cable pr PSU).

Riser powered:
Riser --> 6 pin --> SATA-6PIN cable (from Corsair) --> PSU. (1 riser pr. sata

First question:
Will 1 cable to GPU be enough if you want to OC it? (1 8pin cable only provides 150W right?)
Or should I use 2 separate 8 pins to power 1 GPU)

Second question:
Should I power Rises in another way? I read about fire hazards etc.
Should I power risers like this?

PSU --> VGA (8pin) --> 2x (6+2 pins) powering to risers.



Or can I power like this?

(2 pcs 8pin to dual 8pin pr GPU.)
1x 8 pin in PSU, and 1x 8pin in GPU (leaving 1 (6+2)pin un-used)
1x 8 pin in PSU, and 1x 8pin in GPU + the other 6 pin in riser).

This would make me possible to power 3x risers, and 3 1080ti from 6 outlets in PSU. (2 outlets pr. GPU)
(And no SATA or MOLEX problems powering the risers)


https://imgur.com/o0XIRDf

Yea ive already got a metal wire shelf with everyrhing on but I would like to specifically build a frame for it all. Just another step to tick off on this whirlwind of a hobby 

Lol forget a mining specific frame, I just get a small 2 tier shelf that's stackable for $25. Everything gets secured just as well as a "mining specific" frame. Literally takes less time to put together too lol.

Couldn't agree more! And the cooling on my SC2's shit on MSI Armors, 3 fan gigabytes etc. I Freaking LOVE my SC2's.
I have to do mixed rigs because of those 8+8 giants with my 1600w EVGA because of it. 2 8+8 cards with 4 8+6 cards. Hate those things.

The Gigabyte "Windforce" 3-fan model works OK - I've got one - but it doesn't cool much better than my EVGA SC 2 fan model, and the fans are the standard junk Windforce fancy-name sleeve bearing type that die too fast - and a 1080ti NEEDS that cooling if you're running it at more than 60-70% of TDP.

 Up side - like the EVGA SC - it's a 8 + 6 model not a 2 x 8 model like the Aorus or the Duke or the EVGA FTW (among others).

Ive said exactly the same thing. Its a great frame but not worth that much. Especially when shipping is $90 to the UK. All I need is the lengths of each aluminium section and I can get rhe materials and build it.

I haven’t used the MSI duke the gigabyte tri fan works well for me better than a lot of the basic blowers
If you want to also mine ETH for Nvidia the 1070 is a better choice than the 1080 ti

right now i have 2 in my MIND.

either MSI duke with triple fan or GIGABYTE the triple fan for 1080 TI

which one you suggest if i want to mine eth or other algo ?

I'd recommend to sub for a 1080 TI either best rated or best price as the cards I used in the video

http://amzn.to/2iGVMNH
they've gone up $79 from their original retail, still could potentially be worth it especially if you like green I guess xD

https://youtu.be/1tjhbYAXu6Y

11 cents per kwh

hey if you make a similar quality frame for less I'll buy it

Thanks my friend

~5k and $25-40 bucks a day with all the crazy factors of crypto + good efficiency & density

2x 8 pin is a PITA, I just keep 20 of those 6 pin to 2x 8 pin adapters on hand now because its delayed some builds a week lol

my MSI Aero cards are my favorite TI's especially because they had such a low price earlier this year (700 or less I bought some BNIB for 650)
150 core
500 mem
200 watts
on DSTM stable 720 sols average 3.6 sols per watt

Nice post though this is a really good argument for the evga SC, maybe I shouldnt have sold mine xD

hashrate of asus ? hashrate of giga ??
the same

@QuintLeo
Thats a real argument for the EVGA SC 1080ti Doesn't heard of it before 

 I like my EVGA SC - probably the best 1080 ti that does NOT need 2 x 8-pin power.

 Gigabyte Aorus at 175 watts was also about 685 sol/s but only runs about 60 C for the one in my gaming machine (80F ambient in a well-cooled case).
 The other one I have in a mining rig (82F ambient) is running 220 watts 745 sols at 50C (the fans at 80% are definitely overkill and I should turn them down a lot).
 (edit)  That's at +100 core / +100 memory, higher memory settings gave REDUCED hashrate (I think the Aorus "overclocks" the memory by default), higher core was long-term crashy.

For anyone interested, here are the 1080ti I have and optimal settings I use to achieve stated hash rate at 72+hrs stable;
All cards are +100/+550 with fan min 40%. I do not have time to fine tune.

Make_Model - W - Sols - Sols/W - Temp
MSI Duke: 180 - 681 - 3.70 - 60°C (outside lane)
ASUS STRIX: 190 - 674 - 3.56 - 67°C / 52°C (outside lane)
EVGA SC: 175 - 685 - 3.93 - 65°C
Inno 3D: 185 - 671 - 3.54 - 67°C

EVGA SC Black is the best 1080ti I own and I have three of them. It was also the cheapest purchase, smallest footprint and 2 slot width.