Nobrand / chinese PSU | Bitcointalksearch.org

bmartin44

member

Activity: 85

Merit: 100

Quote from: hanskan on August 08, 2017, 08:56:49 PM

all raisers to main PSU. Only GPUs to secondary PSU

Quote from: Vann on August 08, 2017, 09:39:00 PM

Yes. Essentially the same PSU that powers the motherboard also powers the risers and accessories. The auxillary PSU is just for the VGA power inputs on the cards. Just be sure if you are using SATA or 4-pin molex connectors, to not use more than two connectors per PSU cable max to power risers. Any more than that is a fire hazard since it will overdraw the capacity of the the cable and it could damage the connectors, the cable or the PSU.

Thank you very much @hanskan and @Vann. I really appreciate Vann's detailed info which really help me alot. Yes, I understand that SATA molex connector had limited wattage output, so at max 2 connections to usb risers, I will take note about it.

All the best to your mining

Vann

hero member

Activity: 1036

Merit: 606

Quote from: bmartin44 on August 08, 2017, 08:49:12 PM

Quote from: hanskan on August 08, 2017, 02:56:33 AM

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

yea, i have quite a few of those, they work just fine.

Good to know, but any safety connection issue that I must taking care to?

Like Vann did, PSU that powering the motherboard connected to all usb risers? Or PSU that powering particular GPU connected to the GPU's riser?

Yes. Essentially the same PSU that powers the motherboard also powers the risers and accessories. The auxillary PSU is just for the VGA power inputs on the cards. Just be sure if you are using SATA or 4-pin molex connectors, to not use more than two connectors per PSU cable max to power risers. Any more than that is a fire hazard since it will overdraw the capacity of the the cable and it could damage the connectors, the cable or the PSU.

hanskan

full member

Activity: 336

Merit: 100

Quote from: bmartin44 on August 08, 2017, 08:49:12 PM

Quote from: hanskan on August 08, 2017, 02:56:33 AM

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

yea, i have quite a few of those, they work just fine.

Good to know, but any safety connection issue that I must taking care to?

Like Vann did, PSU that powering the motherboard connected to all usb risers? Or PSU that powering particular GPU connected to the GPU's riser?

all raisers to main PSU. Only GPUs to secondary PSU

hanskan

full member

Activity: 336

Merit: 100

Quote from: sundownz on August 08, 2017, 08:29:49 AM

I have been using nothing but Rosewill for the last 4 years.

Dollar to performance they are really hard to beat in my experience -- also they have great RMA service.

Not sure if you can get them where you live with reasonable SH... but I have owned 40+ of their PSUs and really like them.

Rosewill looks really good, unfortunately it's unavailable for australia at newegg :/ 1500W will be nough for 6*1080ti at 70%tdp ?

bmartin44

member

Activity: 85

Merit: 100

Quote from: hanskan on August 08, 2017, 02:56:33 AM

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

yea, i have quite a few of those, they work just fine.

Good to know, but any safety connection issue that I must taking care to?

Like Vann did, PSU that powering the motherboard connected to all usb risers? Or PSU that powering particular GPU connected to the GPU's riser?

bmartin44

member

Activity: 85

Merit: 100

Quote from: Vann on August 08, 2017, 01:51:57 AM

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

Add2psu is just a reed relay that connects the power and ground on the PSU's in series so that they will start and shutoff together. They work fine. When using a dual or more PSU setup, it's best to use the same brand and type of PSU's. I also use a single PSU to power the motherboard risers and all the accessories and the larger PSU to power the VGA power only. That is the recommended way to avoid ground loops from mixing diffrent voltages and grounds to devices connected to the motherboard.

Thanks for your info. So, your PSU that connected to motherboard connect all the usb risers?

Nebell

full member

Activity: 406

Merit: 104

The problem with Chinese stuff is that it's either hit or miss. They lack quality control. Corsair, Seasonic, etc, they are brands who care about their name. No name = no one cares Grin

But sure you can get lucky and get something really good.
I'd say skip it, it's too risky and you don't want to burn down your place.

sundownz

hero member

Activity: 714

Merit: 512

I have been using nothing but Rosewill for the last 4 years.

Dollar to performance they are really hard to beat in my experience -- also they have great RMA service.

Not sure if you can get them where you live with reasonable SH... but I have owned 40+ of their PSUs and really like them.

hanskan

full member

Activity: 336

Merit: 100

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

yea, i have quite a few of those, they work just fine.

Vann

hero member

Activity: 1036

Merit: 606

Quote from: bmartin44 on August 08, 2017, 01:41:15 AM

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

Add2psu is just a reed relay that connects the power and ground on the PSU's in series so that they will start and shutoff together. They work fine. When using a dual or more PSU setup, it's best to use the same brand and type of PSU's. I also use a single PSU to power the motherboard risers and all the accessories and the larger PSU to power the VGA power only. That is the recommended way to avoid ground loops from mixing diffrent voltages and grounds to devices connected to the motherboard.

bmartin44

member

Activity: 85

Merit: 100

I also was figuring my third GPU powering issue. I'm currently using corsair 650w for 2 cards, if I were to add my third card (forth and fifth in future), I have to change PSU to larger wattage, but expensive. Or I saw a solution to use 2 PSU with add2psu. Anyone used add2psu before, is it stable and safe? Thanks!

Ultegra134

hero member

Activity: 1582

Merit: 758

As the other's have said, don't even think about using a cheap PSU. You might save $50-60 or more bucks by buying a cheap one and then ending up with a burnt motherboard, GPUs or even your whole PC. I had an generic branded Powertech on my Desktop, had zero surge protection and the internals were cheaply made. The result? It's probably at fault for the burnt motherboard, tested another PSU and didn't turn on.
Stick to the major brands, Corsair, Thermaltake and so on. I've bought a Corsair VS650 and I'm perfectly satisfied.

hanskan

full member

Activity: 336

Merit: 100

Thank you very much for taking the time to answer my question. Will stick to corsair.

QuintLeo

legendary

Activity: 1498

Merit: 1030

There is no such thing as a "90 Plus" specification, as shown in one of the pictures on this power supply.

I wouldn't trust it as far as I can throw MARS.

If someone GAVE me that PS I'd probably toss it in the trash - might consider stripping out usable parts first like the fan and some of the screws.

Glory90

full member

Activity: 392

Merit: 101

i prefer to buy a PSU that has been recommended by many miners, and has a good review of the miners.
although price is expensive, most important is the quality.
actually the price of PSU is quite reasonable, more worrying is current VGA price

Vann

hero member

Activity: 1036

Merit: 606

The PSU is the most important component in a mining rig, stick with dual conversion, single rail PSU's from proven name brands like EVGA or Corsair 80+ gold rated or higher. If the PSU fails, at best your whole rig is down and in the worse case it could damage equipment or start a fire. No brand electronics from China are known to cut corners by using second grade components purchased on the black market that don't pass QC of name brand products.

Reputable PSU brands use quality, first-tier components and pay for the 80+ rating certification, which is why they cost more. Slapping a fake certification on a cheap no-name PSU SCREAMS scam, trying to fool people that don't know better. I wouldn't trust that PSU to power a raspberry PI, much less a mining rig. If you can't afford to buy a quality PSU that covers the power requirements of your rig, you can save some money by using two smaller PSU's or a server PSU without risking potentially damaging your investment or burning down your house.

jedigeiss

newbie

Activity: 36

Merit: 0

I also thought about buying cheaper because they are really asking a high price for the PSU s ..
But I will stick to quality..

lanciaominer

newbie

Activity: 46

Merit: 0

if i did not see incorrectly i'm quite "AMAZED" with the 90plus certification. i wonder what it does Roll Eyes

64dimensions

hero member

Activity: 578

Merit: 508

The expensive high quality power supplies are that way for a reason. They use better and more expensive components.

The above posters concerns that this PSU is saving money on cables are spot on. If you are an overclocker or sloppy in setting up the clocks on your GPUs, I would definitely not get this PSU.

There appear to be a couple of significant omissions from this ebay ersatz PSU:

1) The high quality PSU's always brag about using Japanese electrolytic capacitors to the level of specifying the brand. There is a reason for this. Japanese electrolytics are known for their quality. For example EVGA, brags about using solid state Nippon Chemi-con electrolytics. I don't know what type that they use, but this brand of capacitor can operate up to 105C.

2) Most respectable PSU's spec an operating temperature, which I don't see on the ersatz PSU listing.

3) Warranty. In the states, your Corsair's are guaranteed for 10 years.

There are two situation's I would consider using this PSU:

a) As a spare to be temporarily deployed in case an existing lower wattage PSU is being repaired or the replacement is on order.

b) I live close to the arctic circle and the ambient temp of my miners never went above 30C.

hanskan

full member

Activity: 336

Merit: 100

Quote from: pigfrown on August 07, 2017, 03:16:27 AM

If you want to save money on a PSU but still get reasonable quality buy a server PSU.

They are designed for being left on 24/7 and you can get some 2k ones with plenty of amps available on the 12v rail.

The downside is that you may need a breakout board/to manually wire up PCIe connectors, and they are LOUD.

can you give me a link on ebay for decent one please ?
Don't care about the noise since i have built a special room for rigs in my garage.

Topic: Nobrand / chinese PSU (Read 1020 times)