ZTEX USB-FPGA Modules 1.15x and 1.15y: 215 and 860 MH/s FPGA Boards - page 14.

mrb

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Quote from: ztex on May 25, 2012, 02:54:54 AM

Quote from: mrb on May 23, 2012, 04:05:53 AM

And the AOZ1025 is not super efficient.

How do you determine that? The efficiency mainly depends from the external components, namely the lower mosfet and the inductor.

Based on the efficiency graph on page 6 http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf which has been measured with an AO4722 MOSFET.

punin

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Quote from: Turbor on May 27, 2012, 12:42:50 PM

What about Win7 32 ? Tried it today, downloaded Zadig and installed the WinUSB drivers. Was working fine, the boards showed up as ZTEX Modules. When i started cgminer it froze and said something like "capability missing 0 7"... what did i wrong ? I also use a BitForce single and 2 GPUs on this machine.

I was getting this from time to time on linux (BAMT debian) CGMiner 2.4.1. Changed back to BTCMiner + Phoenix

Turbor

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BitMinter

Quote from: nelisky on May 27, 2012, 11:24:01 AM

Quote from: Kuma on May 27, 2012, 07:29:39 AM

Quote from: ummas on May 27, 2012, 03:03:54 AM

anyone have "y" board working with new BFG/CG miner ??
i`m using built version, as all of you know

i was using -S auto and few -S 1/2/3 commands, but nothink seems to work Sad

any experiences ??

I need cgminer to hook "y" up with gpumax.

Which OS are you using? I had some problems to figure correct rights, but that was under Linux.

OS needs libusb-1.0 and no extra flag is required (no -S). What does 'built version' mean? If you are building from source don't forget --enable-ztex.

What about Win7 32 ? Tried it today, downloaded Zadig and installed the WinUSB drivers. Was working fine, the boards showed up as ZTEX Modules. When i started cgminer it froze and said something like "capability missing 0 7"... what did i wrong ? I also use a BitForce single and 2 GPUs on this machine.

nelisky

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Quote from: Kuma on May 27, 2012, 07:29:39 AM

Quote from: ummas on May 27, 2012, 03:03:54 AM

anyone have "y" board working with new BFG/CG miner ??
i`m using built version, as all of you know

i was using -S auto and few -S 1/2/3 commands, but nothink seems to work Sad

any experiences ??

I need cgminer to hook "y" up with gpumax.

Which OS are you using? I had some problems to figure correct rights, but that was under Linux.

OS needs libusb-1.0 and no extra flag is required (no -S). What does 'built version' mean? If you are building from source don't forget --enable-ztex.

Kuma

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Quote from: ummas on May 27, 2012, 03:03:54 AM

anyone have "y" board working with new BFG/CG miner ??
i`m using built version, as all of you know

i was using -S auto and few -S 1/2/3 commands, but nothink seems to work Sad

any experiences ??

I need cgminer to hook "y" up with gpumax.

Which OS are you using? I had some problems to figure correct rights, but that was under Linux.

rupy

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Activity: 725

Merit: 503

Quote from: ztex on May 25, 2012, 02:56:24 AM

Quote from: rupy on May 23, 2012, 05:19:52 AM

Ok, could you add a zero error rate command... that lowers the frequency until error rate is = 0.00% forever?

Yes, a error rate limit this can be added easily. I put it on the todo list for the next release (in June).

Thank you!

ummas

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anyone have "y" board working with new BFG/CG miner ??
i`m using built version, as all of you know

i was using -S auto and few -S 1/2/3 commands, but nothink seems to work Sad

any experiences ??

I need cgminer to hook "y" up with gpumax.

stcupp

full member

Activity: 209

Merit: 100

Quote from: yohan on May 25, 2012, 07:06:40 AM

Manufacturers of regulator chips usually headline the highest efficiency achieveable which is usually at the smallest input/output difference. It's not unusual for a 12V to 1.2V regulator circuit to be around 75-80% even if the headline says 90%+. Best efficiency is rarely at maximum current either.

Yohan

Yep, very true note how a converter might say 95% efficiency but doing 12v to 1.2v conversion at full load theyre more like 75-85% a lot of manufacturers show graphs or a table of efficiency at different voltages and loads in their data sheets

luffy

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BTC payment is not accepted?

yohan

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Manufacturers of regulator chips usually headline the highest efficiency achieveable which is usually at the smallest input/output difference. It's not unusual for a 12V to 1.2V regulator circuit to be around 75-80% even if the headline says 90%+. Best efficiency is rarely at maximum current either.

Yohan

ztex

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ZTEX FPGA Boards

Quote from: vv01f on May 23, 2012, 07:28:10 AM

But if youre right in your position, I doubt ztex wont listen Wink

. Just be patient.

I listen, but I do not reply to such kind of statements Wink

ztex

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ZTEX FPGA Boards

Quote from: rupy on May 23, 2012, 05:19:52 AM

Ok, could you add a zero error rate command... that lowers the frequency until error rate is = 0.00% forever?

Yes, a error rate limit this can be added easily. I put it on the todo list for the next release (in June).

ztex

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ZTEX FPGA Boards

Quote from: mrb on May 23, 2012, 04:05:53 AM

ztex, can you please upgrade the AOZ1025 buck regulator on your designs to another able to output more than 8A to each FPGA, and more efficient? Multiple groups (eldentyrell, bitfury, etc) are writing bitstreams pushing the LX150 beyond 8A...

The current design can deliver up to 240 MH/s (tested).

New designs will not appear within the next three months

Quote

And the AOZ1025 is not super efficient.

How do you determine that? The efficiency mainly depends from the external components, namely the lower mosfet and the inductor.

Quote

Perhaps the IR3840MPbF (86% efficient at 12A output at 1.2V) ?

I made some bad experiences with that series.

sadpandatech

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Quote from: mrb on May 24, 2012, 05:17:13 AM

Quote from: sadpandatech on May 23, 2012, 09:07:13 AM

I can't disagree on wanting available a higher possible amp and not to sound like an Aosmd fan boy, but it's a shame they don't appear offer any regs at higher amperage. :/

the current one is rated 95%
http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf

No. The current one is 75% efficient for a 1.2V@8A output, see page 6 of http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf

Mine is 88% efficient for the same output, see page 9: http://www.irf.com/product-info/datasheets/data/ir3840m.pdf (output voltage is adjustable just like the AOZ1025, by changing resistors).

Thanks for taking te time to flip through those specs to point that out. Probably a good call to migrate off Aosmd anyhows then. ;p They rating 95% with reg at the lowest input then? jerks.

mrb

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Quote from: sadpandatech on May 23, 2012, 09:07:13 AM

I can't disagree on wanting available a higher possible amp and not to sound like an Aosmd fan boy, but it's a shame they don't appear offer any regs at higher amperage. :/

the current one is rated 95%
http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf

No. The current one is 75% efficient for a 1.2V@8A output, see page 6 of http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf

Mine is 88% efficient for the same output, see page 9: http://www.irf.com/product-info/datasheets/data/ir3840m.pdf (output voltage is adjustable just like the AOZ1025, by changing resistors).

sadpandatech

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Quote from: mrb on May 23, 2012, 04:05:53 AM

ztex, can you please upgrade the AOZ1025 buck regulator on your designs to another able to output more than 8A to each FPGA, and more efficient? Multiple groups (eldentyrell, bitfury, etc) are writing bitstreams pushing the LX150 beyond 8A... And the AOZ1025 is not super efficient.

Perhaps the IR3840MPbF (86% efficient at 12A output at 1.2V) ?

I can't disagree on wanting available a higher possible amp and not to sound like an Aosmd fan boy, but it's a shame they don't appear offer any regs at higher amperage. :/

the current one is rated 95%
http://www.aosmd.com/res/data_sheets/AOZ1025DI.pdf

On the one you linked, is the output voltage adjustable? And does thaty company by chance make a higher eff rated reg?

vv01f

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Quote from: rupy on May 23, 2012, 07:24:20 AM

I know, but I would like to be able to control this custom designed enterprise solution to suit my setup.

You might ask to license the layout and built it on your own or with partners.

I personally think ztex is quite qualified to judge his work and how he does it. Or did you hear/read of one badly built boards by him?
I didnt. But I read about things normally boards doant outlive that well.

But if youre right in your position, I doubt ztex wont listen Wink

. Just be patient.

rupy

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I know, but I would like to be able to control this custom designed enterprise solution to suit my setup.

BR0KK

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Were not talking about printers or lightbulps here; these ztex boards are custom designed and not cheap...
I wouldnt count them as a consumer product, more likely a enterprise solution.

Hardware degeneration is normal and to be expected. Like some Parts of your car need to be changed from time to time.

rupy

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It's a fact, lightbulbs used to last 2500 hours, then the manufacturers agreed they would guarantee 1000 hours... Ink jet printers for example have electronic chooking once the pad soaking up the ink gets wet, you can install software that ignores it. I have stopped buying "consumer" products. Professional gear doesn't have fail counters and are built to last.

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