Quote from: MinersAnonymous on August 08, 2014, 05:18:57 AM

Quote from: visdude on August 08, 2014, 04:57:16 AM

Quote from: MinersAnonymous on August 08, 2014, 01:24:32 AM

Quote from: visdude on August 08, 2014, 12:54:44 AM

Quote from: JennaK on August 08, 2014, 12:18:09 AM

A cx600 would be useless to over clock a s3! I need 2 cx750 to have two overclocked s3s

Why do you say that? Have you actually run an S3 with a CX600?

Even if an OC'd S3 draws 450w at the wall, it only represents a 73% load on the CX600.

That's not really how power supplies work. Overall wattage is not the representation of how much power it can give on the 12v rail.
The cx600 has a 46A on the 12V rail, this is 552watts. That's 81.5%load without the added power draw from the wall minus efficiency of the power supply.
Seems it only comes with 2x PCI-E adaptors, so you would need molex to PCI-E or sata to PCI-E if you wanted to connect all 4.

Your explanation on "how power supplies work" does not make any sense at all. I think it only leads to more confusion. How did you come up with 81.5% load on the CX600 with an S3? Please elaborate. What "added power draw from the wall" are you referring to? It is the actual power draw at the wall that computations should be extrapolated from because it is the only concrete number we can get out of the S3 or any device for that matter. Let us indulge ourselves:

AC power draw at the wall * PSU efficiency = DC power draw on +12V rail of PSU
DC power draw on +12V rail of PSU / max load on +12V rail of PSU * = % of load exerted on +12V rail of PSU

Therefore (assuming an OC'd S3 draws 450WAC at the wall using a CX600):

450WAC * 85% = 382.5WDC
382.5WDC / 522WDC * 100 = 73.28%

I am aware that the CX600 label states 46A on the +12V rail, hence you came up with 552W (46A * 12V). Confusingly, the same label also states that the maximum +12V rail wattage is 522W. Which one is a typo? Should it have been 43.5A (522W / 12V) instead of 46A? Anyway, I tend to be conservative and go with the lower rating and be on safe side which is why I used 522W on the above computation that resulted in a 73.28% load. However, even with a maximum of 552W on the +12V rail as you asserted, the load would then be much lower at 69.29% (382.5WDC / 552WDC * 100). So, where was your "81.5%load without the added power draw from the wall minus efficiency of the power supply" derived from?

I reiterate that the Corsair CX500 (also with only two PCIe power connectors) is able to accommodate an S3 OC'd to 250M without any issues whatsoever let alone a CX600. I am not just saying this for the heck of it; I and at least another member in here actually did it. Please read here.

I did not go and explain how power supplies work. I mentioned the user did not know seeing as the only thing he mentioned was the overall wattage of the power supply with the assumption that because its a "cx500" or "cx600" it can handle up to 500 or 600 watts

They mentioned cx 500 600 and 700 so I can't tell you where the goof is, I probably did the math under 12V rail while playing with calculator. Obviously either me or you pointing anything out will not matter because the owners do not care what the components are inside.

You should spend some time emphasizing the fact that these power supplies are clearly made with lower than decent components instead of nitpicking on the load %. This guy went from a cx500 is fine to a sarcastic I should get a ax1500i for 1 miner. I obviously didn't suggest he spend more than the miner, but being sarcastic for someone pointing out things you should care about doesn't help either.

Quote from: suchmoon on August 08, 2014, 05:03:48 AM

Quote from: MinersAnonymous on August 08, 2014, 04:35:09 AM

As long as you are aware you own a trash psu, then that is fine. You do have to buy what you can afford, and spending $400 on a miner and being cheap on a power supply is hands down dumb. If you are too broke to spend the extra $20 on a better psu then you are doing it wrong.

Spending $400 on an Ant and $200 on a PSU does not make sense for a small scale miner. The CX or whatever it is you're so unhappy about works fine with a single Ant and that's all there is to it. Not everyone wants or needs 100A on a single rail. Smaller PSU at peak efficiency is better than underutilized large one. I started with cheap-after-rebate PSUs and it was the best decision I could make back then. Dual PSUs for GPU rigs when everyone was buying LEPAs at ungodly prices, and I could afford spares too. Somebody doing something different than you is not "doing it wrong".

Spending $200 and $50 is a whole different story, you are taking it to an extreme when I mentioned a medium in between of spending a few extra bucks. Spending $50 on a corsair cx500 and spending $70 on a better power supply with decent components sounds reasonable.

Someone doing it different than me has nothing to do with "doing it wrong". Antminer have limited warranty, people live in different conditions. If you have issues with your power supply 4months down the road you will wish you had spent $20 more. Anyone who appreciates hardware knows the one thing you don't do is cheap out on the power supply.

Oy vey!