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Author Topic: Sub>1,000W Power Supplies capable of 90% or greater output on 12V+  (Read 1795 times)
bitlane
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March 03, 2012, 10:57:19 AM
 #1

For those of us that use 2 or more power supplies per miner, it would be a good idea to get as many options for those interested in doing the same all in 1 place.

For instance:
I am a big fan of the Antec 650W EarthPower Green power supplies, as they are not only 80+ efficiency rated (88% I believe), they are also capable of providing 100% of TOTAL rated power on the 12V rail(s) alone.
It's actually a 2 rail PSU rated @ 38A per Rail (and unless my math is not up to par, that's 912W of peak power combined on the 12V rails alone).
A definite THUMBS UP! from me.




My BAD experiences:
Anything from Sparkle Power, as they seem to be a bit weak on the 12V and seem more CPU/HDD oriented, although many are 80+ rated.
Great for Servers, terrible for gaming PCs (LOL...I use them exclusively on all my server builds...)


Feel free to add to the list and try to provide a pic of the label if possible.

Cheers,
bitlane

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fabrizziop
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March 03, 2012, 11:25:11 AM
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I have a seasonic 650HT PSU, it's really nice for the price, as I got it used at OCN for 60$. It's currently powering 3 5830s, along with an Antec BP550 Plus(modular, it's powering 1 5830 and motherboard/HDD).  It delivers 624W on 12V+. The bad thing is that the guy who sold it to me was a heavy smoker, and I had to submerge and wash the PSU with alcohol two times to remove most of the smell.

I also have an Antec 650W EarthPower Green, the same you have, but powering a 5850 and a 5830(my first gaming rig, adapted to bitcoin mining), with a Phenom II X4 955. Fan is very quiet, and it has been running for 8 months 24/7.
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March 03, 2012, 11:52:21 AM
 #3

Every one of my rigs uses dual power supplies. This is by far the most economical way to get as much 12v power as you need.

I try to use power supplies with:

- Active PFCs (to run on 120v or 240v)
- Single 12v rail (these seems to have less problems not running a MB off of one of the PSUs)
- At least 750w

Here is a list of the power supplies that have worked for me.

- http://www.newegg.com/Product/Product.aspx?Item=N82E16817709021 (has 2 12v rails. bought these before I knew better)
- http://www.newegg.com/Product/Product.aspx?Item=N82E16817517008 (use two of these for 5970 rigs)
- http://www.newegg.com/Product/Product.aspx?Item=N82E16817153130 (i was buying these when they were $90/ea)

hashking
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March 03, 2012, 05:20:46 PM
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Dumb question, how once you hook up two power supplies to one motherboard, how do you get the second power supply to startup.

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March 03, 2012, 05:29:12 PM
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You can link one black and one green pins of the PSU with paper-clamp  Grin

Moving on is a simple thing,
what it leaves behind is hard...
jamesg
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March 03, 2012, 05:50:02 PM
 #6

Dumb question, how once you hook up two power supplies to one motherboard, how do you get the second power supply to startup.

I use these...

http://cablesaurus.com/index.php?route=product/product&path=13&product_id=22

And here is one that is a little less expensive...

http://www.frozencpu.com/products/11742/cpa-167a/ModRight_CableRight_Dual_Power_Supply_Adapter_Cable.html
DeathAndTaxes
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March 03, 2012, 05:55:35 PM
 #7

It's actually a 2 rail PSU rated @ 38A per Rail (and unless my math is not up to par, that's 912W of peak power combined on the 12V rails alone).

A warning.  It is rated at up to 38A per rail but only ~54A combined on 12V rails.

They just aren't as clear as some other suppliers.
 


Note the text below rail assignments.



This is slightly easier to understand label because it graphically shows the combined limits.
sveetsnelda
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March 03, 2012, 07:45:33 PM
 #8

Any PSU that is a DC to DC design will allow all or almost all of its power to be drawn from 12v.  These designs go from AC to one large 12V DC supply.  It then has DC to DC circuits for the 3.3V and 5V lines.  Just about all of the Seasonic designs are this way.

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March 03, 2012, 11:36:38 PM
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Various XFX models are manufactured by Seasonic and all feature DC-to-DC conversion. Whether you go with XFX Core or Pro product line is irrelevant, the only difference are modular connectors.
The XFX 1000W Pro Series 80 Plus Platinum is built on the same platform as Seasonic 1000W Platinum and is a great PSU indeed.
XFX units are cheaper than their Seasonic-branded counterparts but tend to come with no extras like cable ties or pouches for unused cables. Warranty period is 5 years long.

I regard these as higher value alternatives to the excellent Seasonic-branded PSUs.
bitlane
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March 04, 2012, 08:19:41 PM
 #10


A warning.  It is rated at up to 38A per rail but only ~54A combined on 12V rails.

They just aren't as clear as some other suppliers.


I wish I could find the link to the review of one of these that initially got me interested in them for mining.

If memory serves me, the reviewer was able to draw a CLEAN 750W+ from the 12V before any rippling/fluctuations of any kind. Again, if memory serves, the protection circuitry kicked in shortly after that......but it was CLEAN power up to that point.
In my books, that's pretty decent for a 650W Power Supply Wink

SlaveInDebt
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March 04, 2012, 10:49:58 PM
 #11

I'll just leave this here

"A banker is a fellow who lends you his umbrella when the sun is shining, but wants it back the minute it begins to rain." - Mark Twain
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March 05, 2012, 12:16:17 AM
 #12

I'll just leave this here
<pic>
What am I looking at?
Which particular PSU does this efficiency table apply to?
Please update your post with additional info.
scifimike12
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March 05, 2012, 01:35:02 AM
 #13

I'll just leave this here


So my POS Coolmax 550w is capable of 950w @ 87.2% efficiency?


Brb, going to buy some more.   Roll Eyes
bitlane
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March 05, 2012, 04:01:48 PM
 #14

I'll just leave this here


Could you also leave the make/model of that particular PSU ?

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March 08, 2012, 12:38:50 AM
 #15



Thanks for the input from all.  Good stuff.
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