Quote
Thanks for the info. But it would be alot harder to measure amp for these USB. I just wanna make sure they don't melt/burn any more of my adapters.
30 cm USB extender (male-female ends) are $1 (inc shipping) from eBay. (cut the power wires)
Topic: Block Erupter USB - Overclocking/ hacking ? - page 7. (Read 168771 times)
30 cm USB extender (male-female ends) are $1 (inc shipping) from eBay. (cut the power wires)
Things I noticed.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
Because watt meters are usually designed to measure 0-1200 or 0-2400 (region dependant) watts. Like many measuring devices they work poorly at their lower end. This is especially true if your wattmeter only displays 1 significant figure eg "2 watts". All of my watt meters (I have 3) have error of +/- 2% according to manuals (one also says +/- 5 watts when <50 watts). Obviously this is not good when trying to measure devices using ~2.5 watts DC / or perhaps 3-4 watts AC.
If you want to measure small power levels, a better idea is to use a digital multimeter in series with the load and measure the current flow directly. I have found most hubs and USB ports output at 4.9 to 5.1 volts. verlts x ermps = whaaats.
For the overclocking of blades, I remember seeing friedcat's post saying it's using 7mmx5mm oscillators and there's 2 oscillators. You can try changing them to 16mhz but that voids the warranty. My info might be wrong too...
EP
Correct two oscillators... one 12 and one 14.318MHZ.. for High and Low speed...
Also pretty sure this entire thread voided all the warranties on my USB's already a few times over, and soon to be the blade... and in a month or two it is a space heater anyways... :-P More Power Now !
Things I noticed.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
Because watt meters are usually designed to measure 0-1200 or 0-2400 (region dependant) watts. Like many measuring devices they work poorly at their lower end. This is especially true if your wattmeter only displays 1 significant figure eg "2 watts". All of my watt meters (I have 3) have error of +/- 2% according to manuals (one also says +/- 5 watts when <50 watts). Obviously this is not good when trying to measure devices using ~2.5 watts DC / or perhaps 3-4 watts AC.
If you want to measure small power levels, a better idea is to use a digital multimeter in series with the load and measure the current flow directly. I have found most hubs and USB ports output at 4.9 to 5.1 volts. verlts x ermps = whaaats.
For the overclocking of blades, I remember seeing friedcat's post saying it's using 7mmx5mm oscillators and there's 2 oscillators. You can try changing them to 16mhz but that voids the warranty. My info might be wrong too...
EP
Anyone do any upgrades on the ASIC Miner Blades? First Gen boards..
I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
I have wondered this also, just don't have one to try, I would say you couldn't go to far w/o some other mods, however I have been wrong before.I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
Sounds good, I`ll try the 14 --> 16MHZ first and see where we end up... Will update tomorrow...
Anyone do any upgrades on the ASIC Miner Blades? First Gen boards..
I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
I have wondered this also, just don't have one to try, I would say you couldn't go to far w/o some other mods, however I have been wrong before. I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
Anyone do any upgrades on the ASIC Miner Blades? First Gen boards..
I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
I have a few crystals which match all the specs(Essentially the same as the USB's but physically bigger)... and I would suspect it would be easier to upgrade then the USB erupters as you can adjust the voltage with the turn of a screw.
My only concern would be how well truly that heat sink is....
Anyone walk down this path already?
Things I noticed.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
Because watt meters are usually designed to measure 0-1200 or 0-2400 (region dependant) watts. Like many measuring devices they work poorly at their lower end. This is especially true if your wattmeter only displays 1 significant figure eg "2 watts". All of my watt meters (I have 3) have error of +/- 2% according to manuals (one also says +/- 5 watts when <50 watts). Obviously this is not good when trying to measure devices using ~2.5 watts DC / or perhaps 3-4 watts AC.
If you want to measure small power levels, a better idea is to use a digital multimeter in series with the load and measure the current flow directly. I have found most hubs and USB ports output at 4.9 to 5.1 volts. verlts x ermps = whaaats.
12 of my OCBE running on a Raspberry Pi
Total watt @ ~140 for 21GH/s includes Raspberry Pi, Internet modem, 2xJalapeno, 12xOCBE @ 448MH/s and a 20cm USB fan.
Things I noticed.
1) A OCBE draws 1A to 1.4A according to my watt meter on wall. Not sure why is there such a huge difference even though the specs is the same.
2) my 8A can only support 6 OCBE which is aligned with 1)
3) RaspBerry Pi somehow can't use port 7 to 10 in my 10 port USB hub even though there's enough power.
4) if you overclock more than 13.5MHz oscillator, you need proper cooling or the OCBE will overheat and give HW errors instead (oscillators can only work up to 70C and some up to 85C)
well after some trial and error I finally got a external power supply working 
Then after a few hours it caught fire lol!
using a LM2596 Buck Converter now for one Block erupter. Had to add a stupid big heat sink to it.
18.24 mhz I think now
http://gyazo.com/8932ae44f3d9ea693a56f54546ff8979
501 mh/s solid other 2 are over clocked also ^_^ just not as much
http://wtfmoogle.com/wp-content/uploads/2013/09/P1010002.jpg
the power supply
16.0mhz First one is taking 1.04 amps @5v from modded usb hub
16.something mhz Second is taking 1.15 amps @5v from modded usb hub
Third No clue!
Then after a few hours it caught fire lol!
using a LM2596 Buck Converter now for one Block erupter. Had to add a stupid big heat sink to it.
18.24 mhz I think now
http://gyazo.com/8932ae44f3d9ea693a56f54546ff8979
501 mh/s solid
other 2 are over clocked also ^_^ just not as muchhttp://wtfmoogle.com/wp-content/uploads/2013/09/P1010002.jpg
the power supply
16.0mhz First one is taking 1.04 amps @5v from modded usb hub
16.something mhz Second is taking 1.15 amps @5v from modded usb hub
Third No clue!
Well 26 Mhz is about as far as they seem to want to go, actually 26.25 Mhz, at 26 was a lot more errors must have been some timing issue or something.
http://photos.mag-productions.com/photos/i-rPkzmZH/0/L/i-rPkzmZH-L.jpg
http://photos.mag-productions.com/photos/i-rPkzmZH/0/L/i-rPkzmZH-L.jpg
The HW errors in bfgminer can be cut when bfgminer recognises it as a block erupter instead of an Icarus. The device should appear as BES (Block Erupter Sapphire), instead of ICA (Icarus). But you need to "brand" your block erupters for bfgminer to recognise them properly.
See: https://bitcointalksearch.org/topic/block-erupter-usb-branding-250326
Quote
I would say it would burst into flames nearly instantly w/o all the heatsinks, they draw about 16 W each now.
Interesting that they scale so inefficiently... you could run 2 stock BE at for 5 W for those MH/s.
Not really. Lets disregard cooling power requirements for fans etc. Calc'd with my local power rate: $0.30 /kWh. Block erupters cost about $20 USD each right now.
2x BE at stock @ 5 W total (~2.5 watts each) for one year:
Code:
0.005 kW * $0.30/kWh * 24 * 365 = $13.14
Total BE cost + electricity = ($20 * 2) + $13 = $53
1x BE OC'd at ~750 MH/s @ 16 watts for one year:
Code:
0.016 kW * $0.30/kWh * 24 * 365 = $42.05
Total BE cost + electricity = $20 + $42 = $62
The difference in total cost is not made up by the OC'd erupters 90 extra MH/s.
So those overclocked BE are actually less profitable than two stock in the long run. My calculation also disregards costs of OC parts and the time you spent modding it. Plus, I doubt that (in a purely statistical sense) a BE with an OC that high would outlive stock BE's on month or year long timescales.
Plus I am sure these will fail much sooner, I find it amazing that there even able to do this kind of overclock, the board being able to handle +7A and the ASICs going from 1.05V to 2.2V. I guess it goes to show that unless you get all the parts for free there pretty much at their operating/price point. Quote
I would say it would burst into flames nearly instantly w/o all the heatsinks, they draw about 16 W each now.
Interesting that they scale so inefficiently... you could run 2 stock BE at for 5 W for those MH/s.
Not really. Lets disregard cooling power requirements for fans etc. Calc'd with my local power rate: $0.30 /kWh. Block erupters cost about $20 USD each right now.
2x BE at stock @ 5 W total (~2.5 watts each) for one year:
Code:
0.005 kW * $0.30/kWh * 24 * 365 = $13.14
Total BE cost + electricity = ($20 * 2) + $13 = $53
1x BE OC'd at ~750 MH/s @ 16 watts for one year:
Code:
0.016 kW * $0.30/kWh * 24 * 365 = $42.05
Total BE cost + electricity = $20 + $42 = $62
The difference in total cost is not made up by the OC'd erupters 90 extra MH/s.
So those overclocked BE are actually less profitable than two stock in the long run. My calculation also disregards costs of OC parts and the time you spent modding it. Plus, I doubt that (in a purely statistical sense) a BE with an OC that high would outlive stock BE's on month or year long timescales.
Quote
I would say it would burst into flames nearly instantly w/o all the heatsinks, they draw about 16 W each now.
Interesting that they scale so inefficiently... you could run 2 stock BE at for 5 W for those MH/s.
Quote
I would say it would burst into flames nearly instantly w/o all the heatsinks, they draw about 16 W each now.
Interesting that they scale so inefficiently... you could run 2 stock BE at for 5 W for those MH/s.
Well 26 Mhz is about as far as they seem to want to go, actually 26.25 Mhz, at 26 was a lot more errors must have been some timing issue or something.
That must get HOT!
Well 26 Mhz is about as far as they seem to want to go, actually 26.25 Mhz, at 26 was a lot more errors must have been some timing issue or something.
That must get HOT!
Well 26 Mhz is about as far as they seem to want to go, actually 26.25 Mhz, at 26 was a lot more errors must have been some timing issue or something.
i do not have the tools to make these mods, however i am interested in having 8 of them upgraded so long as they still fit on my anker 10 port hub. anyone offer a modding service yet in the US?
I screwed up with getting the wrong type of crystals. But my test erupter works fine now I replaced with stock xtal. Now I await a new shipment of xtals.
On the resistor front - damn I wish jaycar stocked them instore
Also I found with the xtal's - either flipping them and using a fine tip iron to add a little solder (or putting a little on the pads) then placing them on the board and using a heat gun to melt the solder works great.
EDIT:
An idea about getting enough power to a stick:
Anyone tried using those dual USB cables commonly found in older external 2.5in HDDs? Obviously your USB hub would be then out half their ports - but maybe a neat way to run it without screwing about with more indepth modding.
And to the person who posted the melted PSU - how random! I just had a dream last night where my pi's case melted like that!
On the resistor front - damn I wish jaycar stocked them instore
Also I found with the xtal's - either flipping them and using a fine tip iron to add a little solder (or putting a little on the pads) then placing them on the board and using a heat gun to melt the solder works great.
EDIT:
An idea about getting enough power to a stick:
Anyone tried using those dual USB cables commonly found in older external 2.5in HDDs? Obviously your USB hub would be then out half their ports - but maybe a neat way to run it without screwing about with more indepth modding.
And to the person who posted the melted PSU - how random! I just had a dream last night where my pi's case melted like that!
Jaycar? you must be aussie.
im in Melbourne and have spare resistors and a few spare crystals. but RSonline sells packs of 50 resistors for $2 delivered if you can find the right brand. I think they were listed as 4c each min 50 units.
delivery built into the price and they were here in 2 days. cant complain.
as for powering I find im just putting less per hub atm till I can get new power supplies. so instead of 5 I might get 4 etc.
Haha yeah - I'm Aussie. Used to manage a DSE back when they actually sold components, then we went on our own and used Farnell, Electus and a few others for component supplies. I miss those days of being able to walk into a shop on a saturday and get everything you need right away.
I did an order with RS after my last post. By the time I am back home on the weekend I'll have the xtals, resistors and a few more erupters. I have found an interesting 5VDC fan and heatsink combo that I could pair two erupters onto one board. And they are only about $8. I doubt I'll bother though and just use a big heatsink row I have already.
I screwed up with getting the wrong type of crystals. But my test erupter works fine now I replaced with stock xtal. Now I await a new shipment of xtals.
On the resistor front - damn I wish jaycar stocked them instore
Also I found with the xtal's - either flipping them and using a fine tip iron to add a little solder (or putting a little on the pads) then placing them on the board and using a heat gun to melt the solder works great.
EDIT:
An idea about getting enough power to a stick:
Anyone tried using those dual USB cables commonly found in older external 2.5in HDDs? Obviously your USB hub would be then out half their ports - but maybe a neat way to run it without screwing about with more indepth modding.
And to the person who posted the melted PSU - how random! I just had a dream last night where my pi's case melted like that!
On the resistor front - damn I wish jaycar stocked them instore
Also I found with the xtal's - either flipping them and using a fine tip iron to add a little solder (or putting a little on the pads) then placing them on the board and using a heat gun to melt the solder works great.
EDIT:
An idea about getting enough power to a stick:
Anyone tried using those dual USB cables commonly found in older external 2.5in HDDs? Obviously your USB hub would be then out half their ports - but maybe a neat way to run it without screwing about with more indepth modding.
And to the person who posted the melted PSU - how random! I just had a dream last night where my pi's case melted like that!
Jaycar? you must be aussie.
im in Melbourne and have spare resistors and a few spare crystals. but RSonline sells packs of 50 resistors for $2 delivered if you can find the right brand. I think they were listed as 4c each min 50 units.
delivery built into the price and they were here in 2 days. cant complain.
as for powering I find im just putting less per hub atm till I can get new power supplies. so instead of 5 I might get 4 etc.
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