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+--- Thread: Building 4x GTX 1080 recommendation (/thread-5615.html)
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Building 4x GTX 1080 recommendation - timonline86 - 07-07-2016
I am planning on building a 4x GTX 1080 hash cracking build and would like recommendations on whether I should go for a socket 1151 motherboard VS 2011v3 one.
Secondly depending on the motherboard, which CPU has enough PCI lanes to effectively run all those cards.
This is a possible build I have in mind but feel free to correct me if it will not work out:
Case: Corsair 900D
Motherboard: ASUS Rampage V
Processor: Intel Core i7 5820K (Plan to upgrade to i7 6900K eventually)
GPU: 4x EVGA GTX 1080 Founder's Edition
RAM: 32GB Quad Channel Memory running at 2400Mhz
PSU: EVGA SuperNOVA 750 Gold 80+
Any feedback is appreciated
RE: Building 4x GTX 1080 recommendation - azren - 07-07-2016
You will need more power for your PSU as 4 x GTX 1080 FE will require at least 720W (180W x 4) and 750 W psu won't be enough.
i7 CPU should be able to handle 4 GPU. I'm using i5 and runs 4 x 1080 FE ok.
Best regards,
Azren
RE: Building 4x GTX 1080 recommendation - timonline86 - 07-07-2016
(07-07-2016, 02:57 PM)azren Wrote: You will need more power for your PSU as 4 x GTX 1080 FE will require at least 720W (180W x 4) and 750 W psu won't be enough.
i7 CPU should be able to handle 4 GPU. I'm using i5 and runs 4 x 1080 FE ok.
Best regards,
Azren
Thanks for responding, so the motherboard and CPU are fine but I just need to up my PSU to 1500W or 1600W one?
RE: Building 4x GTX 1080 recommendation - azren - 07-07-2016
I beleive 50% to 60% capacity is recommeended for PSU efficiency. So in your case you will need a PSU of 1500W / 1600W PSU.
Read here for explanation of PSU efficiency.
https://www.techpowerup.com/forums/threads/how-does-psu-efficiency-affect-me-and-do-i-really-need-an-80-plus-gold-power-supply.129456/
By the way, Im using a 1200W PSU from my old build.
Best regards
Azren
RE: Building 4x GTX 1080 recommendation - timonline86 - 07-07-2016
Updated my question to a 1500/1600W PSU based on your advice.
Am I good to go with these specs?
Case: Corsair 900D
Motherboard: ASUS Rampage V
Processor: Intel Core i7 5820K (Plan to upgrade to i7 6900K eventually)
GPU: 4x EVGA GTX 1080 Founder's Edition
RAM: 32GB Quad Channel Memory running at 2400Mhz
PSU: Corsair AX1500i 80+ Titanium
RE: Building 4x GTX 1080 recommendation - kamsulla - 07-14-2016
(07-07-2016, 04:10 PM)timonline86 Wrote: Updated my question to a 1500/1600W PSU based on your advice.
Am I good to go with these specs?
Case: Corsair 900D
Motherboard: ASUS Rampage V
Processor: Intel Core i7 5820K (Plan to upgrade to i7 6900K eventually)
GPU: 4x EVGA GTX 1080 Founder's Edition
RAM: 32GB Quad Channel Memory running at 2400Mhz
PSU: Corsair AX1500i 80+ Titanium
4xcards very very high temp.
Im not sure1, cooling gpu's this case. I check the image this case and fans only "disc side".
Im not sure2, power 320-400watt per card, link, I using 1000w psu 2 x gtx1080 at single xeon cpu.
RE: Building 4x GTX 1080 recommendation - kiara - 07-14-2016
1, temps might be an issue, u did not mention what case will u use but u should take in mind that the cards should never reach over 79C, after this point 80-82C the card will throttle, so make sure to take fans that push enough air inside the case aswell taking it out.
2, the PSU that u mention (1500) is more than enough
3, on the mobo
u need to take in mind that the mobo that u offered here as no vga port..
unless u planing to run a linux os on them, because when using one of the DVI/HDMI port of the cards when u will run the attacks it will be laggy as hell.
RE: Building 4x GTX 1080 recommendation - unforgiven - 02-07-2017
(07-14-2016, 08:50 PM)kiara Wrote: 1, temps might be an issue, u did not mention what case will u use but u should take in mind that the cards should never reach over 79C, after this point 80-82C the card will throttle, so make sure to take fans that push enough air inside the case aswell taking it out.
2, the PSU that u mention (1500) is more than enough
3, on the mobo
u need to take in mind that the mobo that u offered here as no vga port..
unless u planing to run a linux os on them, because when using one of the DVI/HDMI port of the cards when u will run the attacks it will be laggy as hell.
I'm using a HDMI port on a card (conected to my monitor) being under pressure of hashcat and there was no problem.
RE: Building 4x GTX 1080 recommendation - unforgiven - 02-07-2017
ok i'm late but it might be good for people who are planning to build such a thing.
So if you mean ROG RAMPAGE V EDITION 10 i gotta say no. you can't achieve what you want.
i have not tested but from what we can find out from specs here:
https://www.asus.com/us/Motherboards/ROG-RAMPAGE-V-EDITION-10/specifications/
with a Core i7 5820K you can't get 4x gpus to work.
Look at expansion slots part:
4 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x8/x8, x16/x8/x8/x8 or x8/x8/x8/x8 mode with 40-LANE CPU; x16, x16/x8 or x8/x8/x8 mode with 28-LANE CPU)
The 5820k only supports 28 lanes so you are going for x8/x8/x8 mode at most!
The RAMPAGE V EXTREME also has the same problem.
I would be happy to hear any opposite ideas.
RE: Building 4x GTX 1080 recommendation - kiara - 02-07-2017
(02-07-2017, 12:37 PM)unforgiven Wrote: ok i'm late but it might be good for people who are planning to build such a thing.
So if you mean ROG RAMPAGE V EDITION 10 i gotta say no. you can't achieve what you want.
i have not tested but from what we can find out from specs here:
https://www.asus.com/us/Motherboards/ROG-RAMPAGE-V-EDITION-10/specifications/
with a Core i7 5820K you can't get 4x gpus to work.
Look at expansion slots part:
4 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x8/x8, x16/x8/x8/x8 or x8/x8/x8/x8 mode with 40-LANE CPU; x16, x16/x8 or x8/x8/x8 mode with 28-LANE CPU)
The 5820k only supports 28 lanes so you are going for x8/x8/x8 mode at most!
The RAMPAGE V EXTREME also has the same problem.
I would be happy to hear any opposite ideas.
hashcat work perfectly with x4 . i dont see any problem with that.
the problem can happen if u try to mount big dics, but even that x4 is enough to load it all,
if u would use a riser the problem above could apply u, but x4 is good enough
some one correct me if im wrong
from wiki
![[Image: 3c3f1162dab64d97980a2fe41d4f9e70.png]](http://image.prntscr.com/image/3c3f1162dab64d97980a2fe41d4f9e70.png)