Topic: 1GH/s, 20w, $700 (was $500) — Butterflylabs, is it for real? (Part 2) - page 12. (Read 146936 times)
February 16, 2012, 08:48:19 AM
So where do I buy it?
February 16, 2012, 08:41:14 AM
Far outpacing any other FPGA offering.
Give me a break.
Its performance per watt is less than half of a 6s150 FPGA design.
It's very likely that these BFL units will become unprofitable later this year,
as more power-efficient technologies start to drive the network difficulty.
-rph
Give me a break. Show me one shipping unit that comes anywhere even CLOSE to BFL's offering. Go on... send me a link. Don't give me your theoretical bullshit you just spewed out in the quote. Show me something tangible. You can't, because you're talking shit.
(had to find the numbers in my IRC log
)Anyway - are BFL's actually shipping yet? ... No your one doesn't count
The guy with the Icarus that I keep chatting with (and helping) in IRC was getting a U: of 3.3/m with the testing we did last night (1 hour run)
(aside: with it connected to a router not a PC
)So that would imply 235Mh/s +/- something like 10%
And it was measuring 9W ...
February 16, 2012, 08:26:36 AM
Far outpacing any other FPGA offering.
Give me a break.
Its performance per watt is less than half of a 6s150 FPGA design.
It's very likely that these BFL units will become unprofitable later this year,
as more power-efficient technologies start to drive the network difficulty.
-rph
Give me a break. Show me one shipping unit that comes anywhere even CLOSE to BFL's offering. Go on... send me a link. Don't give me your theoretical bullshit you just spewed out in the quote. Show me something tangible. You can't, because you're talking shit.
February 16, 2012, 08:23:46 AM
i should have been more clear. i mean why can the two chips do it and my 7970s cant.
Your miner must implement rollntime and so also must your pool.Both or it doesn't happen.
cgminer does
Edit: or look at it this way:
It has nothing to do with your 7970 vs the BFL FPGA.
Inaba was using cgminer on his pool.
That means his pool allows rollntime (and cgminer of course does also)
ckolivas has his 7970 doing 717 Mh/s with cgminer ... ... ...
February 16, 2012, 08:23:29 AM
OK so pay me now please
Efficiency is the number of shares per getwork.
In normal mining with 1 difficulty shares, you'd expect on average one share per getwork.
(if you mine fast enough)
If you use rollntime, you can then hash a full nonce range again each time you change the time in the block header.
If you do it 4 times you can expect to get 5 shares per getwork ... = 500% efficiency.
Edit: and to be complete ...
Also what you hash is 80 bytes =
version(4) previous hash(32) merklroot(32) time(4) difficulty(4) nonce(4)
(where (x) is the size in bytes)
When you roll the time, you change the time(4) and then hash another nonce range
A nonce range is when you try different values for 'nonce' so a full nonce range is 0x00000000 to 0xffffffff or 2^32 different values
A pool will say if it allows rollntime - coz if it doesn't allow it, then any shares you return with rolled time will not match what they expect.
Efficiency is the number of shares per getwork.
In normal mining with 1 difficulty shares, you'd expect on average one share per getwork.
(if you mine fast enough)
If you use rollntime, you can then hash a full nonce range again each time you change the time in the block header.
If you do it 4 times you can expect to get 5 shares per getwork ... = 500% efficiency.
Edit: and to be complete ...
Also what you hash is 80 bytes =
version(4) previous hash(32) merklroot(32) time(4) difficulty(4) nonce(4)
(where (x) is the size in bytes)
When you roll the time, you change the time(4) and then hash another nonce range
A nonce range is when you try different values for 'nonce' so a full nonce range is 0x00000000 to 0xffffffff or 2^32 different values
A pool will say if it allows rollntime - coz if it doesn't allow it, then any shares you return with rolled time will not match what they expect.
I wish I understood this, but I'm happy there are people who do...
February 16, 2012, 07:00:34 AM
OK so pay me now please
Efficiency is the number of shares per getwork.
In normal mining with 1 difficulty shares, you'd expect on average one share per getwork.
(if you mine fast enough)
If you use rollntime, you can then hash a full nonce range again each time you change the time in the block header.
If you do it 4 times you can expect to get 5 shares per getwork ... = 500% efficiency.
Edit: and to be complete ...
Also what you hash is 80 bytes =
version(4) previous hash(32) merklroot(32) time(4) difficulty(4) nonce(4)
(where (x) is the size in bytes)
When you roll the time, you change the time(4) and then hash another nonce range
A nonce range is when you try different values for 'nonce' so a full nonce range is 0x00000000 to 0xffffffff or 2^32 different values
A pool will say if it allows rollntime - coz if it doesn't allow it, then any shares you return with rolled time will not match what they expect.
Efficiency is the number of shares per getwork.
In normal mining with 1 difficulty shares, you'd expect on average one share per getwork.
(if you mine fast enough)
If you use rollntime, you can then hash a full nonce range again each time you change the time in the block header.
If you do it 4 times you can expect to get 5 shares per getwork ... = 500% efficiency.
Edit: and to be complete ...
Also what you hash is 80 bytes =
version(4) previous hash(32) merklroot(32) time(4) difficulty(4) nonce(4)
(where (x) is the size in bytes)
When you roll the time, you change the time(4) and then hash another nonce range
A nonce range is when you try different values for 'nonce' so a full nonce range is 0x00000000 to 0xffffffff or 2^32 different values
A pool will say if it allows rollntime - coz if it doesn't allow it, then any shares you return with rolled time will not match what they expect.
February 16, 2012, 06:40:22 AM
Yeah. Typical sketchy behaviour from BFL.
STILL no information about that chip under the heatsink.
STILL no shipping information.
STILL no proof they have more than 3 devices anywhere at all.
STILL 4-6 weeks delivery.
How lazy or incompetent can you get if this is not a long con ?
Buy them up folks ! Magic in a box for sure. Efficiency 500% : what more do you need
?
STILL no information about that chip under the heatsink.
STILL no shipping information.
STILL no proof they have more than 3 devices anywhere at all.
STILL 4-6 weeks delivery.
How lazy or incompetent can you get if this is not a long con ?
Buy them up folks ! Magic in a box for sure. Efficiency 500% : what more do you need
? February 16, 2012, 06:23:01 AM
February 16, 2012, 05:18:26 AM
February 16, 2012, 12:09:49 AM
Far outpacing any other FPGA offering.
Give me a break.
Its performance per watt is less than half of a 6s150 FPGA design.
It's very likely that these BFL units will become unprofitable later this year,
as more power-efficient technologies start to drive the network difficulty.
-rph
February 15, 2012, 11:57:55 PM
Video of the device? What do you want the video to show? A box with a red light? heh
Even though it could be doctored, maybe a video of the box hooked up to a computer with a display on the screen of mhash/s.
Also, a walk through from opening the box, hooking it up and getting the software running.
I realize that's a lot to ask, but it's certainly something I'd be watching right now if it was available.
February 15, 2012, 11:57:39 PM
The video could show general sound level, and could show how easy it was to get it to start hashing.
February 15, 2012, 11:44:31 PM
Video of the device? What do you want the video to show? A box with a red light? heh
February 15, 2012, 11:42:06 PM
The fact is the most devices ever seen together in a photo is 3. How about a picture of the boxes ready to ship with labels on them?
Also, we've never seen video of the device.
Also, we've never seen video of the device.
February 15, 2012, 11:38:55 PM
The silence is deafening - noone but Inaba has received a device yet.
Assuming they shipped out the first batch on Monday, surely some people in the mid-west would have received their unit by Wednesday evening, no?
Assuming they shipped out the first batch on Monday, surely some people in the mid-west would have received their unit by Wednesday evening, no?
February 15, 2012, 11:26:38 PM
I'm thinking we'd get it by May 1st
I was thinking April 1st, surely.So you have faith that they are really shipping as we speak & will be shipping more within the next 4-6 weeks?
That said, yes I think I'll get mine eventually. I waited a bit to order, so I may not actually be in the first group, so hopefully I won't get the ass-ugly fan-protruding-from-the-bottom design.
heh, ya I wouldn't care what it looks like. But I was asking what if you ordered one from the website today, when would you expect to receive it?
Hence, if you "pre-ordered" and you're thinking April 1, then I'm thinking I wouldn't be until May 1 or June 1 even...
This makes me want to learn how to make them on my own this weekend instead.
February 15, 2012, 11:18:42 PM
I'm thinking we'd get it by May 1st
I was thinking April 1st, surely.So you have faith that they are really shipping as we speak & will be shipping more within the next 4-6 weeks?
That said, yes I think I'll get mine eventually. I waited a bit to order, so I may not actually be in the first group, so hopefully I won't get the ass-ugly fan-protruding-from-the-bottom design.
February 15, 2012, 10:59:24 PM
I'm thinking we'd get it by May 1st
I was thinking April 1st, surely.So you have faith that they are really shipping as we speak & will be shipping more within the next 4-6 weeks?
February 15, 2012, 10:35:58 PM
I'm thinking we'd get it by May 1st
I was thinking April 1st, surely. February 15, 2012, 10:31:06 PM
Thanks Inaba, great report.
I wish BFL would come back onto the forums and give some "official" updates as to the progress beyond this loaner unit.
I wish BFL would come back onto the forums and give some "official" updates as to the progress beyond this loaner unit.
Yes, the question is when will get their first actual unit to keep?
The website still says 4-6 weeks.
What are people's best estimate of when someone would get a unit if they ordered via the website today (February 15, 2012)?
Do you think April 30, 2012 is possible?
Might be faster for my friends and I to try making our own?
They said now that they are shipping, refunds will not be given for cold feet.
I presume that 2nd part is only for people in the first batch ...Their website still says guaranteed shipment 4-6 weeks from order. Obviously 'guaranteed' means nothing.
Now the magic question is, if they are shipping, what is their production run. Do new orders have to wait 4-6 weeks?
Phil
Phil
Agreed, want to start estimating when we would get a unit if we bought it today?
I'm thinking we'd get it by May 1st
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