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Topic: 650W Enough for 2x 1080 Ti ?? - page 2. (Read 376 times)

sr. member
Activity: 2142
Merit: 353
Xtreme Monster
January 05, 2018, 10:00:45 AM
#9
forget any chinese psu, they are crap, local retailer has one chinese psu 1850 watts and selling for $460, they are blood crazy asking that, i would not pay a single dollar for it.
full member
Activity: 728
Merit: 106
January 05, 2018, 09:56:55 AM
#8
I have 650W and 700W supplies who stop working when mining with 2 1080ti's on 100% power limit without other systems (no hdd/cpu/mobo).
Get 750W or more, gold or better.

What kind of 650W and 700W power supply was it?

I know what all of you are saying. I wouldn't be mining at 100% power limit. More like 75%, ~185W per card.

185W
185W
100W+
---------
470W

But anyways, I still haven't bought a power supply. Kinda wishing I had last week when they were on sale. I'm using an EVGA 850 B2 right now. But I'm expecting to get some more cards.

I think it was cheap one with Chinese watts  Grin
There are shitpsu like aerocool which can't handle even 2 1070. While declaring 700w
newbie
Activity: 90
Merit: 0
January 05, 2018, 09:48:13 AM
#7
It's more than enough, only if you limit power to 70% or lower.
SSD/cpu/mobo/ram,ram, is not more than 40W.
sr. member
Activity: 2142
Merit: 353
Xtreme Monster
January 05, 2018, 09:44:57 AM
#6
It's more than enough, make sure you put the power limit to 70%.
member
Activity: 155
Merit: 11
January 05, 2018, 07:13:15 AM
#5
I have 650W and 700W supplies who stop working when mining with 2 1080ti's on 100% power limit without other systems (no hdd/cpu/mobo).
Get 750W or more, gold or better.

What kind of 650W and 700W power supply was it?

I know what all of you are saying. I wouldn't be mining at 100% power limit. More like 75%, ~185W per card.

185W
185W
100W+
---------
470W

But anyways, I still haven't bought a power supply. Kinda wishing I had last week when they were on sale. I'm using an EVGA 850 B2 right now. But I'm expecting to get some more cards.
newbie
Activity: 75
Merit: 0
January 03, 2018, 12:36:15 PM
#4
as a recommendation, there should always be 200 Watts or so left when summing up all the power needs.
member
Activity: 125
Merit: 35
January 03, 2018, 12:26:46 PM
#3
I have 650W and 700W supplies who stop working when mining with 2 1080ti's on 100% power limit without other systems (no hdd/cpu/mobo).
Get 750W or more, gold or better.
newbie
Activity: 75
Merit: 0
January 03, 2018, 12:19:06 PM
#2
I don't think that's enough.
Motherboard and CPU are going to need some ca 100 Watts too.
And there should always be a little headroom left, a PSU isn't supposed to run at 100% capacity all the time.
member
Activity: 155
Merit: 11
January 03, 2018, 11:45:02 AM
#1
Is the SeaSonic PRIME Platinum 650W enough for 2x 1080 Ti mining rig?

*Edit: it would have lower efficiency being past 50% load, so it would be cheaper to get a 850W gold PSU right?
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