Maybe if their overdriving the chip and there second hand $50 chips that's why they only have six months of warranty?
That is a very strange warranty period for something that is considered a long term (> 1year) investment.
Topic: OK, i confirmed the model of FPGA they are using in BFL single. - page 4. (Read 16693 times)
That is a very strange warranty period for something that is considered a long term (> 1year) investment.
Very interesting find. Subscribing to thread.
Maybe if their overdriving the chip and there second hand $50 chips that's why they only have six months of warranty?
That is a very strange warranty period for something that is considered a long term (> 1year) investment.
Maybe if their overdriving the chip and there second hand $50 chips that's why they only have six months of warranty?
That is a very strange warranty period for something that is considered a long term (> 1year) investment.
Gonna be interesting what affect this has on singles ...
Likely: Nil.
Gonna be interesting what affect this has on singles ...
Maybe if their overdriving the chip and there second hand $50 chips that's why they only have six months of warranty?
That is a very strange warranty period for something that is considered a long term (> 1year) investment.
http://www.alibaba.com/showroom/ep3sl150.html
This is awesome, lets buy them up before BFL gets them.
Mwhahahaha I can already see there is much drama potential in this as soon as the supply is dried up
This is awesome, lets buy them up before BFL gets them.
Mwhahahaha I can already see there is much drama potential in this as soon as the supply is dried up
I see this as both good a bad news. The bad news is that they probably only have a limited quantity of this chip available. Either they will have to raise the price, or redesign their product using a Spartan or something else more modern.
Well their mini rig is faster per chip and consumes less power, so they already have some new chip now ?
Based on power quotes and speed the mini rig matches spartan 6 efficiency. I think they're using Spartan 6's
Yes, is likely, I suppose 128 spartan6
Each spartan about 200MH/s, 128 x 200= 25.6GH/s
Each spartan about 10Watt, 128 x 10= 1280W
Theoretically is correct
The strange is the price... 15k$ for 128 spartan, about 120$ for each... the while cost for each chip in this moment is double
Gimme some of what your smoking
Spartan 6's do not go for $240 even at retail more like $175 retail
have you ever heard of getting things cheaper in bulk?
I imagine you could get them $100 ea or cheaper in QTY
How many chips would you have to buy? IDK I figure if your buying thousands you can get a pretty sweet deal though
Nice catch, watching closeley.
ngzhang, based on the specs for the chip, would you say that BFL is overdriving this chip, or is it comfortably within it's specs?
the answer is, FPGAs include mass of possibility. if it can hold the Tj under the rated absolute maximum, i must say there is no over-driving at all.
ngzhang, based on the specs for the chip, would you say that BFL is overdriving this chip, or is it comfortably within it's specs?
Maybe if their overdriving the chip and there second hand $50 chips that's why they only have six months of warranty?
Nice detective work, ngzhang and xaxik. I really did not expect with this type of community that the BFL would stay shrouded in mystery for too long.
I see this as both good a bad news. The bad news is that they probably only have a limited quantity of this chip available. Either they will have to raise the price, or redesign their product using a Spartan or something else more modern.
Well their mini rig is faster per chip and consumes less power, so they already have some new chip now ?
Based on power quotes and speed the mini rig matches spartan 6 efficiency. I think they're using Spartan 6's
Yes, is likely, I suppose 128 spartan6
Each spartan about 200MH/s, 128 x 200= 25.6GH/s
Each spartan about 10Watt, 128 x 10= 1280W
Theoretically is correct
The strange is the price... 15k$ for 128 spartan, about 120$ for each... the while cost for each chip in this moment is double
They use around 20 modules with 2 CPU each, so around 40 chips. Not 128
ngzhang, based on the specs for the chip, would you say that BFL is overdriving this chip, or is it comfortably within it's specs?
I see this as both good a bad news. The bad news is that they probably only have a limited quantity of this chip available. Either they will have to raise the price, or redesign their product using a Spartan or something else more modern.
Well their mini rig is faster per chip and consumes less power, so they already have some new chip now ?
Based on power quotes and speed the mini rig matches spartan 6 efficiency. I think they're using Spartan 6's
Yes, is likely, I suppose 128 spartan6
Each spartan about 200MH/s, 128 x 200= 25.6GH/s
Each spartan about 10Watt, 128 x 10= 1280W
Theoretically is correct
The strange is the price... 15k$ for 128 spartan, about 120$ for each... the while cost for each chip in this moment is double
I see this as both good a bad news. The bad news is that they probably only have a limited quantity of this chip available. Either they will have to raise the price, or redesign their product using a Spartan or something else more modern.
Well their mini rig is faster per chip and consumes less power, so they already have some new chip now ?
Based on power quotes and speed the mini rig matches spartan 6 efficiency. I think they're using Spartan 6's
i also check the price of this chip.
on digikey, it's about 2000-3000USD,
http://www.digikey.cn/product-search/zh/integrated-circuits-ics/embedded-fpgas-field-programmable-gate-array/2556262?k=EP3SL150
but this old chip is about 200-300USD in China market for a new one, and about 50-60 USD for a used one. i discussed with my supplier about the strange price, they said because nearly no one use this stuff, so the price is like a " markdown sale", so there are no large quantity of this chip in the market, maybe only a few hundreds (both new and used one).
all above is only personal viewpoint, I shall not accept any responsibility.
So which one is in the single ? the 2000-3000 or 200-300 USD chip ?
I see this as both good a bad news. The bad news is that they probably only have a limited quantity of this chip available. Either they will have to raise the price, or redesign their product using a Spartan or something else more modern.
Well their mini rig is faster per chip and consumes less power, so they already have some new chip now ?
I just came across this thread https://bitcointalksearch.org/user/xaxik-34181
the guy is saying he programmed one of these chips to do 250mhs without any effort.
the guy is saying he programmed one of these chips to do 250mhs without any effort.
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