1x 1250W PSU or jump 2x600w ones. Which is better solution?

rovchris

full member

Activity: 238

Merit: 100

Quote from: Benny1985 on June 20, 2013, 11:17:03 AM

Quote from: rovchris on June 19, 2013, 05:43:57 AM

Running 2 PSU's will burn more electricity than running one large one - I have tested this.

Only buy a digital PSU if you want any kind of efficiency near full load.

A cheap PSU near full load will consume around 30% of the input power!

It's horses for courses really - if you are paying for electric then really you want it as efficient as possible

Pretty sure the issue with that is if you're buying crappy, inefficient PSUs vs. superior PSUs... That can happen regardless of price.

Either way, you want something above bronze for a rig.

If you want one of the dual-PSU adapters (not the Add2PSU's), my store stocks them cheaper than anyone else, AFAIK: http://buyahash.com

I did say a cheap PSU - I am using corsair AX1200's which are 96% efficient at full load.

Benny1985

sr. member

Activity: 391

Merit: 250

Quote from: rovchris on June 19, 2013, 05:43:57 AM

Running 2 PSU's will burn more electricity than running one large one - I have tested this.

Only buy a digital PSU if you want any kind of efficiency near full load.

A cheap PSU near full load will consume around 30% of the input power!

It's horses for courses really - if you are paying for electric then really you want it as efficient as possible

Pretty sure the issue with that is if you're buying crappy, inefficient PSUs vs. superior PSUs... That can happen regardless of price.

Either way, you want something above bronze for a rig.

If you want one of the dual-PSU adapters (not the Add2PSU's), my store stocks them cheaper than anyone else, AFAIK: http://buyahash.com

rovchris

full member

Activity: 238

Merit: 100

Running 2 PSU's will burn more electricity than running one large one - I have tested this.

Only buy a digital PSU if you want any kind of efficiency near full load.

A cheap PSU near full load will consume around 30% of the input power!

It's horses for courses really - if you are paying for electric then really you want it as efficient as possible

darksoft

sr. member

Activity: 275

Merit: 250

Quote from: CartmanSPC on June 18, 2013, 03:01:11 PM

Quote from: darksoft on June 16, 2013, 09:21:59 PM

Quote from: kimihiro on June 16, 2013, 08:05:16 PM

I have similar prob
can someone show me how to "join" 2 or more psu?
or give me the link
TIA

http://www.add2psu.com/

I'm using one now, works like a champ.

I'll eventually be using dual PS's but don't know if I should go with the add2psu version or this one:

The one pictured above does not require a molex connection and looks cleaner but have a feeling the add2psu version may be better engineered? It has what looks like a relay that must do something?

It kicks the second psu on automatically when powering on the first one. That split plug looked a bit hinky to me which is why I went with the add2psu. You can use multiple add2psu's if needed.

CartmanSPC

legendary

Activity: 1270

Merit: 1000

Quote from: darksoft on June 16, 2013, 09:21:59 PM

Quote from: kimihiro on June 16, 2013, 08:05:16 PM

I have similar prob
can someone show me how to "join" 2 or more psu?
or give me the link
TIA

http://www.add2psu.com/

I'm using one now, works like a champ.

I'll eventually be using dual PS's but don't know if I should go with the add2psu version or this one:

The one pictured above does not require a molex connection and looks cleaner but have a feeling the add2psu version may be better engineered? It has what looks like a relay that must do something?

jomay

full member

Activity: 167

Merit: 100

If you like messing around with hardware and know how to connect them or how to solder you could simply get a server power supply. You can get used 1kW - 2kW PSUs on ebay for <50$. There are Dell server PSU with a 80 Plus Titanium certification (!) running at 96% efficiency. I doubt you'd get them on ebay, though, as they are pretty new.

crazyates

legendary

Activity: 952

Merit: 1000

If you have to ask, go with 1. If you're fully capable of troubleshooting your own problems, get 2.

bcpokey

hero member

Activity: 602

Merit: 500

Quote from: darksoft on June 16, 2013, 09:21:59 PM

Quote from: kimihiro on June 16, 2013, 08:05:16 PM

I have similar prob
can someone show me how to "join" 2 or more psu?
or give me the link
TIA

http://www.add2psu.com/

I'm using one now, works like a champ.

I usually steer people away from DUal PSUs just because of how many problems I've seen with people getting them properly working, but that looks pretty sweet actually. Simple, no fuss, no muss, and seems like it should work just fine. I may recommend that (and maybe even try it myself some day Cheesy

)

darksoft

sr. member

Activity: 275

Merit: 250

Quote from: kimihiro on June 16, 2013, 08:05:16 PM

I have similar prob
can someone show me how to "join" 2 or more psu?
or give me the link
TIA

http://www.add2psu.com/

I'm using one now, works like a champ.

kimihiro

newbie

Activity: 21

Merit: 0

I have similar prob
can someone show me how to "join" 2 or more psu?
or give me the link
TIA

mxc0bbn

member

Activity: 79

Merit: 10

Welcome to Miami!

Well, I'm not doing it to get rich off it, but certainly would like to make some profit so there is an element of ROI in my question...

I currently have a Seasonic 1250 Gold and a Seasonic 1000W platinum, but I also have a Corsair 850 and a 450 which I could jump for another rig so they don't go to waste. Maybe experimentation is the best way to decide.

I'm not completely decided so if anyone else has any feedback it is most welcome.

Thanks,
Mike

P.S. nice rig by the way.

navigator

sr. member

Activity: 362

Merit: 250

1 is the best solution. 2 is the cheapest.

Sometimes you can get a 400w Corsair for under $20 after rebates. 5 of those and you got 2000+ watts for $100.

ssateneth

legendary

Activity: 1344

Merit: 1004

I prefer 1. Reduces the risk of current leak from slightly higher voltage to lower voltage line (say 12.05v to 11.8v). Rosewill Lightning 1300W and Seasonic x1250 or xfx pro series 1250w (They are identical internally) are my power supplies of choice.

Tornate

full member

Activity: 128

Merit: 100

1 x 1250 is confidence

jamesg

vip

Activity: 1358

Merit: 1000

AKA: gigavps

If you are in bitcoin mining (or alt coins) for profit, 2 smaller PSUs are always better when considering ROI as they will almost always be cheaper than 1 larger PSU.

If you are in mining to geek out on hardware or "just for fun" then a single power supply that is more expensive is fine.

I've even designed specific open air cases to hold 2 PSUs.

shilex

member

Activity: 93

Merit: 10

i prefer one power supply per rig, the problem when you take 2 ist hat you have a extra thing that can break down, if you want i can get you nice cm 1500 watt at a very nice price

mxc0bbn

member

Activity: 79

Merit: 10

Welcome to Miami!

Obviously one is less space to use and less complication of having to jump 2, but I mean overall including the price of a 1200+ PSU versus just buying 2 600w ones.

Topic: 1x 1250W PSU or jump 2x600w ones. Which is better solution? (Read 1716 times)