Topic: Gigampz: Power Supply Kits & Adapters For Bitcoin Mining. Industrial grade. - page 10. (Read 68227 times)

well to late i guess...web site says "sold out"

Searing

I'm VERY happy with the board!
I hope you guys make out well with it.

It's nice to see people go from concept to product and have it come out neat, clean, and reliable.

Thanks! glad you're happy with the board, we work hard to make a top quality product. 

Ordered one of these boards directly from Gigampz for $40 and picked up a power supply from an eBay seller for $17.
Order date was 5/30/2014.
Shipping was FAST!  It's been sitting on my "bench" (currently the dining room table) for a couple of days now.
Power supply arrived today, so I took the couple of minutes to plug it all in.

First observations - the Gigampz board looks nice!  Components don't have that sloppy mass produced look and the power socket fits snugly and evenly on the back of the power supply.  It is extremely EASY to use.  Plug it in, screw down the wires, add power, move jumper, done.

The HP power supply is much smaller than the two LED supplies I was using, about half the size.  So far the fans are also quieter.  We'll see how that goes as they day gets warmer.  So far with the S1 overclocked to 393.75, I'm seeing 453 Watts of draw.  The two LED supplies would draw 460 Watts at the lowest draw and were typically up around 472 Watts.

Now, I could have soldered the connectors on to the power supply myself and saved the $40 but sometimes you just want simple and easy.  Plus, if the power supply dies, it's just the cost of the supply, unplug the old, plug in the new.

Now, as a cost comparison, the price with the board and the power supply is the same as the two LED supplies but it is much more efficient and smaller.
Compare that to the cost of a decent ATX power supply and you're probably ahead of the game.

Nicely done!

Wow, that is a really nice photo, excited for the review.

Apologies for the delays on this one guys, will likely be another 9 days or so before my review goes up. Teaser:

If you are looking for the lowest possible PSU costs per Ant you can skip the 6-pin cables which are pricey and just use a few simple lengths of size 14 AWG wire since the S1's all have screw terminals.  Also if you are willing to pay in BTC and ordering multiple items then email us at [email protected] and we can probably knock the price down a few more bucks as well to the point where the decision might be more clear cut.

thanks for info
so it is close decision  if you want 6 s-1's

Yes, you should be able to run two of those on a Gigampz/DPS-800GBA 120v input on all but the highest overclock setting which might work but it would be right on the edge.  On 240v input you could run two HEX8A1's on any overclock no problem.

https://bitcointalksearch.org/topic/technobit-hex8a1-260ghs-coincraft-based-miner-reviewed-476970

Very nice analysis of the PSU cots power usage trade offs, here are the measurements...

Using a Model P4400 Kil-a-Watt meter these are the numbers I get...
With no load on the circuit my kill-a-watt reads 122 volts.

Stock clocks; 2 Ants...
volts: 118.3
amps: 6.76
watts: 797

Over Clocked to 393.75; 2 Ants...
volts: 118.3
amps: 7.54
watts: 889

Over Clocked to 393.75; 1 Ant...
volts: 119
amps: 3.74
watts: 442  (about 4% more efficient than the dell you reference)

Overclock Settings...
"""
option 'freq_value'     '5f05'
option 'chip_freq'      '393.75'
option 'timeout'        '36'
"""

I should have specified,
2 260 's hex8A1
120v

Thank you,

so   what does a pair of s-1's clocked to 393 freq  hashing at 400gh pull on a k-watt meter?    120 volt measurement please...  do you get 800 watts or do you get more like 840?

I ask because   3 of the above    could run 6 s-1's         at 393 freq.   with wires   you would be talking 250 usd.   


 now I can get  2 evga 1300 watt super nova 2  Atx psus.    they will run the six at 393 hash at 1200gh  and pull   2430 watts. all on 120 volts.


but on a best price offer 2 of these are 320   Newegg just had a special on them.     

comes to 70 usd more.  the evga would be better only if    the hp's pull a lot more power.     the 320 price for 2 is hard to get more often the price is 340 for 2      even 380 for 2.

   to make up 70 in price  if the hp's pull 2550 watts vs 2430 watts .  that is 3 kwatts a day.  or about 40 50 cents.     so in 140 days the evga would be better.    but that is only if the 3 hp's pull 2550 watts.  I would like to see one with a kwatt meter.


I owned one of the 750 watt dells I had the lessor model it used 460 watts to run 1 ant at 393 freq.  due to this I decided to buy a lot of evga's

  but 460 x 6 = 2760 watts and you could run only 1.5 ants on a dell at 393 freq so I would  have needed 4 dells at 75 bucks or 300 up front.  to burn close to 2750 watts.

  I got 2 evga's and burn 2430 watts .  I paid 340 for the two at www.raktuten.com   my point is these may work better if you want to run six s-1s then the evga's

Per your suggestion, I flipped a few of the S1's around and made them cubes of 4 (except the stack of three).  We'll see how it affects cooling, but I'm willing to try anything to prepare for the hot summer.
So far they've ranged from 48C to 53C in this configuration when the temp reached 82F outside and 89F in the mining room.



And so this post isn't a total hijack of the thread...

Tip for any Gigampz purchasers out there.  Make sure you raise your PSU's a bit so the metal bottom doesn't rest flat on whatever surface/shelves you put it on.  I use rubber adhesive feet on mine.
You want some air to get under these PSU's since they can get pretty warm, especially when you're pushing them.

Yes, that should work.  Depending on what HEX8A1 model we are talking about you could probably run two of the bigger ones or several under clocked or smaller ones especially if you ran off 240 volt wall power.

Do you think I could power two technobit coincraft hex8a1's with this set up?

Yeah, the tinned 16awg ends make it very tough to fit two 16awg wires in a slot together. An option around this is to cut off the doldered tip and strip a new 5mm of exposed wire, which makes twisting and inserting two wires much easier

I am in for 2 boards and 2 PSUs.

If they wont power the Habs I'll swap them out with the 1000watt PSUs I am using on some Ant miners. I am going to go with thicker cables and splitters at the end.

I'll post up pics of this solution on the Habs when I get them. Next week maybe?

I'm using a couple of the first prototypes and they work awesome.

This ended up being the most economical route for me.

Plan on getting more in the future.

    Yes, I think it would work with a single supply if you were on 240V.  The nice thing about the Habanero is it has independent power inputs so if you were running on 120v you could use 3 Gigampz / DPS-800's per 2 Habaneros and it should work.

    Here is a photo...



    Yes you have to double up wires if you are going to attach them directly to the board.  Each contact can fit up to a size 12 AWG wire so they can easily fit two size 18 AWG and 16 AWG is a tight fit but possible.  The other options is using heavy duty cables from the board combined with a splinter as jedimstr did.