Discontinued: Lancelot (Heavy Duty 400 Mega hashes, 2 x FPGA Mining Board) - page 13.

blackarrow

hero member

Activity: 532

Merit: 500

Quote from: cimpex on May 28, 2013, 06:42:49 AM

@blackarrow
please use cooler with a higher quality next batch. out auf 12 1 already stucks and 4 are very loud and I expect them to stuck in a few days.

Noted. The most we have tested the Lancelots was 3 days and we did not noticed any problems. We assumed that the fans are ok and the factory promised that these are high quality and will run uninterrupted for a long time.

We will change the factory and will try to run the fan by itself for more than 3 days.

For this batch unfortunately is too late to change them.

cimpex

sr. member

Activity: 588

Merit: 252

buying a suitable cooler is not that problem (already done, silent noiseblocker for 5 €) but I hate buying something like that just for rubbish. don't support this! Angry

setkeh

newbie

Activity: 40

Merit: 0

Quote from: bitpop on May 28, 2013, 12:16:40 PM

Thanks. I know we can use bigger up to the diagonal being able to screw into the heat sink.

Without Dimensions its hard to say Cheesy

Though if thats a 40mm on the board the you should be able to fit a 60mm Cheesy

though i cant say for sure unless some one provides measurements of the heatsink or my boards show up Cheesy

bitpop

legendary

Activity: 2912

Merit: 1060

Thanks. I know we can use bigger up to the diagonal being able to screw into the heat sink.

setkeh

newbie

Activity: 40

Merit: 0

Quote from: bitpop on May 28, 2013, 06:59:39 AM

And please find us some on ebay for replacements.

Quick bit of searching pulled these up (Granted i dident check the actual fan size for the board)

Code:

http://www.ebay.com.au/itm/2pcs-25mm-DC12V-2-Pin-VGA-Video-Heatsink-Mini-Cooler-Cooling-Fan-f-Computer-PC-/280914861172?pt=AU_Components&hash=item4167d49c74&_uhb=1
http://www.ebay.com.au/itm/K1BO-12V-2-Pin-40mm-Computer-Cooler-Cooling-Fan-PC-Black-F-/251269283662?pt=AU_Components&hash=item3a80d0ff4e&_uhb=1
http://www.ebay.com.au/itm/Twin-40mm-Cooling-fan-40x40x10mm-For-PC-more-With-4-screws-/200928384509?pt=UK_Computing_Case_Fans&hash=item2ec843d5fd&_uhb=1
http://www.ebay.com.au/itm/2x-BLK-30mm-DC-12V-2-Pin-VGA-Video-Heatsink-Cooler-Cooling-Fan-f-Computer-PC-/290738876283?pt=AU_Components&hash=item43b1632f7b&_uhb=1
http://www.ebay.com.au/itm/f-Computer-PC-Black-12V-2x-25mm-DCVGA-Video-Heatsink-Mini-Cooler-Cooling-Fan-/181137501574?pt=AU_Components&hash=item2a2ca2ed86&_uhb=1
http://www.ebay.com.au/itm/25mm-Small-Fan-Standard-Computer-Cooling-PC-Case-Cool-Casefan-3-PIN-18cm-lead-/230853927590?pt=UK_Computing_Case_Fans&hash=item35bff762a6&_uhb=1
http://www.ebay.com.au/itm/25mm-PC-Cooling-Fan-Cooler-For-System-CPU-Computer-Case-/250701786652?pt=UK_Computing_Case_Fans&hash=item3a5efdae1c&_uhb=1
http://www.ebay.com.au/itm/Chassis-Case-Cooling-Fan-cooler-f-Computer-PC-black-/290603365288?pt=AU_Components&hash=item43a94f73a8&_uhb=1

Hope This Helps Put people looking for spare fans on the right path

bitpop

legendary

Activity: 2912

Merit: 1060

And please find us some on ebay for replacements.

cimpex

sr. member

Activity: 588

Merit: 252

@blackarrow
please use cooler with a higher quality next batch. out auf 12 1 already stucks and 4 are very loud and I expect them to stuck in a few days.

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: bitpop on May 27, 2013, 11:03:52 PM

Thank you kano I sent you 4 cents

Ah I thought one of those 2 (similar) anonymous donations might be you - thanks indeed

bitpop

legendary

Activity: 2912

Merit: 1060

Thank you kano I sent you 4 cents

blackarrow

hero member

Activity: 532

Merit: 500

Quote from: wedgy2k on May 26, 2013, 03:53:44 AM

Will the Lancelot (Group Manufacturing Shipping 15th July) be available as a collection from Reading UK?
Could the remaining 50% be payed on collection?
You have a good rep on here and I'd rather you hold 50% of my order money than some of the "other" company's selling mining kit!

It will be cheaper to purchase from China as UK charges 20% VAT and our reseller 10%. If you insist on picking up from UK we can arrange this.
Please send an email message to our sales team to arrange this.

Regards!

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: bitpop on May 27, 2013, 10:08:06 AM

And lastly what if you don't use any timing?

3.1.1 always defaults the settings to match a 380MH/s Icarus Rev3 ... i.e. if you don't specify
The next version will default them for the BLT (Black Arrow Lancelot) to be a 400MH/s Lancelot
If you change the firmware from the default you'll need to set --icarus-timing
Some of this in is FPGA-README ... ... ...

bitpop

legendary

Activity: 2912

Merit: 1060

And lastly what if you don't use any timing?

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: bitpop on May 27, 2013, 09:51:10 AM

Last question. Short vs long?

Short means it times it for about an hour and uses the end of that forever after until you quit cgminer.
Long means it keeps re-estimating forever.
Long is better than short if you computer performance is inconsistent - since it breaks up history into 10 sections and throws the oldest one away after they are all full and requires to open a new section.
Short saves wasting re-estimating it over and over again (but re-estimating has only a negligible negative affect on performance)

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: jimmy3dita on May 27, 2013, 09:51:26 AM

For sure "short timing" is the best choice on the older firmware, with the new one I see orange leds (idle) randomly blinking, meaning that it's possible to squeeze a bit more from the chips Cheesy

Yes the V42 firmware has a non-constant clock so as soon as cgminer comes up with an estimation, it's wrong if the clock changes.
My estimation code uses a line of best fit for the data points - but if the clock isn't constant and I don't know what the clock is ... it's not a straight line.
Why to use the =N value is explained before

squall1066

copper member

Activity: 2310

Merit: 1032

Can anyone here help me out on this please.

https://bitcointalksearch.org/topic/lancelots-firmware-216792

I got help from blackarrow and he sorted in 5 min, I have had a drive crash, Now I cant get it going again, As I have no clue what he did.

jimmy3dita

hero member

Activity: 588

Merit: 500

For sure "short timing" is the best choice on the older firmware, with the new one I see orange leds (idle) randomly blinking, meaning that it's possible to squeeze a bit more from the chips Cheesy

bitpop

legendary

Activity: 2912

Merit: 1060

Last question. Short vs long?

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: bitpop on May 27, 2013, 09:27:07 AM

Thank you amazing kano. I did see higher mhs but it was probably fake. I still don't know what I'm doing
so I'm sticking with short. Yes I'm using standard rom and p2pool, I need it to abort quickly.

Forcing it to abort earlier doesn't make any advantage for p2pool.
It checks every 100ms for an LP and aborts the work early if an LP occurs.

kano

legendary

Activity: 4592

Merit: 1851

Linux since 1997 RedHat 4

Quote from: bitpop on May 27, 2013, 09:29:00 AM

Can I just keep using short and have it do it's thing?

Yes.

The only advantage of not using short is that if there is some major computer performance hiccup during the ~1hr that short takes to run, it may get something strange as the performance figures it uses from 1hr forever after until you restart it.

bitpop

legendary

Activity: 2912

Merit: 1060

Can I just keep using short and have it do it's thing?

Topic: Discontinued: Lancelot (Heavy Duty 400 Mega hashes, 2 x FPGA Mining Board) - page 13. (Read 86497 times)