Topic: [WORLDWIDE]Bitmine - 950 GH/S 1500 USD - Next day delivery. - page 4. (Read 60029 times)

 I'm sad to report that my latest delivery never achieves a hash-rate greater than 850GH/s at the pool, despite my best efforts at tuning and troubleshooting

 I was informed this is "normal"

 Needless to say, I'm unhappy with my latest delivery. Not sure how these cables got frayed like that between the time it left their facilities and was delivered to my doorstep.

Guys, I advise everyone who bought from them to leave feedback on their profile. Write down how good or bad miners are. Only in that way we can get more average image of this manufacturer.

Mine's been hashing fine since I got it a few days ago, but even with tweaking the blade freqs, I can't get over 900GH/s poolside.

Thanks for your effort in showing us details of the item.  I only wish the vendor could provide as much details on what they're selling.

Your pictures confirm my concern (based on a fuzzy image posted earlier by the seller) on the location of the RasPi (and controller board) which is right along the path of the hot exhaust airflow of the modules.  Bunching all those cables/wires in the same area don't help either as it would only exacerbate the accumulation of heat by restricting airflow.  Personally, I'd move those cables off to the side and relocate the RPi and the controller board to a cooler area in the case and add "pull" fans on the exhaust grill.

Figured out all the technical quibbles(downloading the right image, re-imaging SD card, Advanced Ip scanner, setting pool info etc), now for the showoff:


Well packed, like a mummy's tomb.  Yellow tape everywhere!



Dusty fans!  Either extensive "burn in tests" or....



No display.  Black bare bones case, tons of screws everywhere.  White label says "0.204", but that was incorrect IP.



All internal!  Generic PSU, no brand name markings anywhere.  My guess 1100W or so.



Close up of the controller board and Raspberry Pi with 8 GB SD card which I had to re-image with Dragon image




All in all, it's hashing away at it's proposed rate on the Dragon interface:


Gotta tweak it though, tons of errors and can't quite get it up to the 950-1000 GH/s at the pool side probably because of all the errors.  High 800's so far, but that's before changing any frequency settings.

I'll look over Finlof's tweak guide suggestions to lower frequency through SSH this weekend perhaps.

For $1500 it's a decent buy.  Probably used a little bit, but I don't plan to run this thing forever.

$1750 is probably little much for this miner, but at the same time still cheaper than the Dragons and S2's.

Can't say anything bad about Bit-tech, they delivered within 4-6 business days, so I left them positive feedback escrowed through OgNasty.

Hope this helps anyone thinking about buying this miner.

Chuck

...to say the least.  Heck, the price on the thread title itself is inconsistent; it depends on which post/page you're reading.

Whats the stock status and price for Bitcoin miners now.

OP is many confusing with many prices and info.

see https://bitcointalk.org/index.php?topic=545642.0;all for some tuning help

Gotcha.  I actually let the win32disk imager run overnight pretty much, just to see if it would fit.

When I checked it this morning, it said complete.  So I popped it back into the RaspPi, plugged it into the miner, powered on the unit, and was able to finally discover it using Advanced IP Scanner(Default Dragon IP is 192.168.1.134).

Thanks for all your help guys!!!

 I discovered not too long ago that 8GB cards come in different sizes at their upper limit Some SD's can fit images, some can't. Ended up just getting 16GB cards to play it safe.

 YMMV

So I downloaded Win32Disk Imager and selected the dragonboot-4BLADE-ENG.img on the E drive or SD slot of my PC.

I clicked Write, now it's going through but really slowly.

Does it matter that the 8GB SD Card only shows 7.42 GB in Windows after formatting it, since the Dragon image is 7.76 GB?

Or does that not matter when using this utility?

Why dont you try the dragon image?

I think it's on a different subnet like mine was. I couldn't find it on my network so I reimaged the SD which defaults back to 192.168.1.134.

I got my miner today.
It's one of the black ones with 4 fans that sounds like an old 707
It's loaded with dust on the fans and blades...obviously "well tested", but it hashes at 960GH/s and it cost me $1500 delivered, so yeah, that's OK with me.

The only problem I had was not being able to find the ip on my network, so I reflashed the SD and that did it.

Can't login to this miner.  Tried to direct connect with a PC and put it on both 192.168.1.1 and 192.168.0.1 network, but I'm unable to scan the miner using Angry IP Scanner.

Is there a step I'm missing, do I have to do anything with the Raspberry Pi before I try logging in?

yes

So it was $1750 + shipping?

Bit-tech confirmed full payment 24hours ago.

Hoping to get tracking information soon.

Are they still refunding 0,1 Btc for every day of late shipment?

got the miner
english firmware was already on and no problems at all with some loose cables or something
hashing great 985gh/s
thx bit-tech

 Thank you very much for this post. Very helpful for tweaking