Antminer S3 PSU question

[Two4D]

Ok I have a few questions I would like to ask about S3s.

What is good ( in terms of safety and watts / GHs ) clock speed to overclock my S3 miners?

And what PSU would you suggest me to run 2 miners at that clock speed?

I have already posted my question in one of S3 threads, but my post got behind so fast, so I decided to make a new thread.

Thanks.

[nitehawk]

im using a 750w to power two without any problems

[Two4D]

im using a 750w to power two without any problems

Really? Thats kinda awesome...but I would like to overclock them a little bit, at least to 480 GHs.

[v0n]

A lot depends on quality and efficiency of the PSU. My S3's arrived today, I only had generic ATX 550W PSUs handy (pci-e wires for server PSUs didn't arrive on time), I hooked it up to generics and a single S3 unit wouldn't power off a 550W PSU. I had to split the load between two 550W PSUs. I then plugged one 550W watt PSU powering only single blade of A3 (one with WRT/config card) into socket with load and voltage reader and a single blade running off some generic chinese power supply is drawing 249W, so far cry from manufacturers figure of 360W per unit, 180W per blade. Obviously losses on 12V rail in this particular PSU must be epic, but fair bet that 750W version of PSU with such terrible design wouldn't be able to power two S3's, you could barely power up one.

[Two4D]

Ok I understand. I found some really cheap PSUs ( Tecnoware ) 500W PSU for 25€....what you guys say about that? If they are ok to use, I would use 1 on each miner.

[Johanna]

Ok I understand. I found some really cheap PSUs ( Tecnoware ) 500W PSU for 25€....what you guys say about that? If they are ok to use, I would use 1 on each miner.

I suggest using a good gold or platinum power supply. You don't want your power supply to killl your s3 miner..

[v0n]

Ok I understand. I found some really cheap PSUs ( Tecnoware ) 500W PSU for 25€....what you guys say about that? If they are ok to use, I would use 1 on each miner.

As I wrote, a really cheap 550W PSU in my case was just a waste of time and electricity and single unit ended needing two of them. If you don't want soldering/modding server power supplies you need to invest in proper single rail PSU that either has constant wattage (24/7) figure in specs or is rated at twice the power you need (750W for single S3)

[ck]

Ok I understand. I found some really cheap PSUs ( Tecnoware ) 500W PSU for 25€....what you guys say about that? If they are ok to use, I would use 1 on each miner.

As I wrote, a really cheap 550W PSU in my case was just a waste of time and electricity and single unit ended needing two of them. If you don't want soldering/modding server power supplies you need to invest in proper single rail PSU that either has constant wattage (24/7) figure in specs or is rated at twice the power you need (750W for single S3)

Fully agreed. At the end of the day, you want to have peace of mind that your mining operation is running stably. That way your time can be spent on better things, ie setting up more miners

[Two4D]

Ok you guys are right. So what about corsair vs650? I have read under specs that it has 2x PCIE 6pin connectors, but those probably wont fit the S3?

[cloverme]

Ok you guys are right. So what about corsair vs650? I have read under specs that it has 2x PCIE 6pin connectors, but those probably wont fit the S3?

Keep in mind that you can only order the S3 in batches of 2 from bitmain, so if you want to run two S3's, you need a PS with 4 PCI-E connectors and higher wattage. 

[Two4D]

I am planning to run 1 with 1 PSU, so no problem Do I need 2x 4pin or 6pin connectors to power it without overclocking?

[kgb2mining]

2 per PCI-E for non-overclocked just like the S1.

We use the Dell Z750 server PSU to power 2 OC'd S1's and they run just fine. You'd be good with those and they're pretty cheap. Look into the "breakout boards" for them, you can get a PSU, board and cables for under $100usd which will power 2 S3's

[Two4D]

Ok ok good, so Corsair VS650 should be good, as I have read it has 2x PCIe 6pin connectors, right?

[philipma1957]

Ok ok good, so Corsair VS650 should be good, as I have read it has 2x PCIe 6pin connectors, right?

 not sure they must be on 2 cables.  not 2 plugs on 1 cable

[v0n]

By far the cheapest option is the old good Dell server PSU N750P series. Modifications to run as stand alone 12V power supply are extremely well documented on the net, it's available everywhere for less than 20 Euros or 15 GBP. Very high and stable output, designed to work 24/7, slim and less bulky than ATX, very low losses (around 7-9W), runs cold and quiet. All you need is two 6 pin cables of modular type, cut one end of each cable, one short insulated wire to bridge pins A1 and B6 on PSU to trigger auto power on, one jumper across A1 and B1, one jumper across B2 and C2 (to stop the fan from spinning full blast in emergency mode). And it just so happens that the +12 and ground output blades perfectly match with 6.3mm female crimp connectors, so adapting 6pin cables couldn't be any easier. I then use short piece of heat shrink tubing around each blade connector to provide snug insulation. 20 minutes of work tops, less than 30 quid in parts.

http://ocuk.filmsuk.com/dell_psu_adapted.jpg
      

[FeodoroAndy]

Use a good rated PSU, for example corsair, for two units, i am using HX1000W corsair psu, no problems at all.

[ck]

I'm thinking of getting the Cooler Master V1200 Platinum PSU (http://www.coolermaster.com/powersupply/v-series/v1200/) to power 3 S3s would that run fine? Everything is going to be on stock, no tweaks whatsoever. I just need something that can power them reliably.

Also, a pretty noob question... The datacenter I am looking at provides 6 x power sockets of 13Amp over 220V each in the cabinet. Does this mean that in total I can put equipment that consumes approximately 12000~ watts of power usage without tripping anything? Or should that be ~2000W?

Cheers

[pidge]

I'm running two S3's of a FSP Aurum PRO Series 1000W Modular PSU, which gets a generally good review by Jonny Guru (http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=292 is the hot performance stats)

I've also got another two S3's, each running off a FSP Raider 650W, with an adapter cable to use the EATX 8-pin CPU power lead as well as the PCIe 6-pin power lead.

[philipma1957]

I'm thinking of getting the Cooler Master V1200 Platinum PSU (http://www.coolermaster.com/powersupply/v-series/v1200/) to power 3 S3s would that run fine? Everything is going to be on stock, no tweaks whatsoever. I just need something that can power them reliably.

Also, a pretty noob question... The datacenter I am looking at provides 6 x power sockets of 13Amp over 220V each in the cabinet. Does this mean that in total I can put equipment that consumes approximately 12000~ watts of power usage without tripping anything? Or should that be ~2000W?

Cheers

maybe maybe not.

if you drop to freq 212.5 most likely yes.

I have some evga 1300 watt golds.  they run 3 s-1's at freq 393 overclock pulled 1215 watts for 1 month in a row.  I would think they will do the trick.

[Two4D]

Ok, still looking for answer if Corsair VS650 would be good to power 1 S3? I am not good with that stuff, so I will not be modifying server PSUs.