Man who came up with 92
They are really common, a lot of the GPUs use 92mm fans.
Topic: Jalapeno voltage? varies widely (Read 5276 times)
Yeah but mine is very low compared to yours and my other one. And it's also getting 1,000 hw errors
Seems Jalapenos do indeed vary quite a bit, here's a screenshot from mine:
Crazy, well i guess 1k is better but my other is nill.
I have > 4K errors since last 12hrs or so
2013-06-18 16:26:06] 5s: 5.38 avg: 5.45 u: 5.19 Gh/s | A:19519 R:42+0(.21%) HW:4586
Damn I got a big problem, 1000 hardware errors! http://imgur.com/dX8Hlnc
Ignore the rejects, I was testing p2pool
Ignore the rejects, I was testing p2pool
I have > 4K errors since last 12hrs or so
2013-06-18 16:26:06] 5s: 5.38 avg: 5.45 u: 5.19 Gh/s | A:19519 R:42+0(.21%) HW:4586
Possibly, sadly I didn't really test it before modding it. But the temp is great. I do remember the temp before was +10
Spooky, could this mean that a lot of the jalapenos will fail within a short timeframe?
Did you change the fan? Could that make any difference(normally it should not)?
Is it possible that the heatsink have been moved around or something like that, or that you have shorted something?
Damn I got a big problem, 1000 hardware errors! http://imgur.com/dX8Hlnc
Ignore the rejects, I was testing p2pool
Ignore the rejects, I was testing p2pool
Spooky, could this mean that a lot of the jalapenos will fail within a short timeframe?
Did you change the fan? Could that make any difference(normally it should not)?
Is it possible that the heatsink have been moved around or something like that, or that you have shorted something?
Damn I got a big problem, 1000 hardware errors! http://imgur.com/dX8Hlnc
Ignore the rejects, I was testing p2pool
Ignore the rejects, I was testing p2pool
Spooky, could this mean that a lot of the jalapenos will fail within a short timeframe?
Did you change the fan? Could that make any difference(normally it should not)?
Is it possible that the heatsink have been moved around or something like that, or that you have shorted something?
my 2 do not have a large variance.
stock cooling/case, running 24 hours straight, in a warm room (80F). 40C 41C, 3.0v 3.1v, 7.35Gh/s 7.23Gh/s, HW errors 64 122.
These were delivered about 1 week apart. Hope the data helps you.
stock cooling/case, running 24 hours straight, in a warm room (80F). 40C 41C, 3.0v 3.1v, 7.35Gh/s 7.23Gh/s, HW errors 64 122.
These were delivered about 1 week apart. Hope the data helps you.
Damn I got a big problem, 1000 hardware errors! http://imgur.com/dX8Hlnc
Ignore the rejects, I was testing p2pool
Ignore the rejects, I was testing p2pool
I have > 4K errors since last 12hrs or so
2013-06-18 16:26:06] 5s: 5.38 avg: 5.45 u: 5.19 Gh/s | A:19519 R:42+0(.21%) HW:4586
Looking at the source code, the MCU reads three different voltages: 3.3v, 1v, and PWR_MAIN (12v). The 3.3v is being fed to the MCU through a voltage divider (/2) and also with the 12v (except with a /10 divider). I wonder which of these voltages is cgminer trying to report.
You mean "looking at" cgminer's source code? Somewhere there is the printf that outputs that metric, stored in a variable being fed the reference value upstream from there. Given BFL's doc push of the last days, couldn't it be determined that way?Yeah, I glanced at the BFLSC driver in cgminer yesterday and found the voltages but I didn't quite know what was going on there.
Damn I got a big problem, 1000 hardware errors! http://imgur.com/dX8Hlnc
Ignore the rejects, I was testing p2pool
Ignore the rejects, I was testing p2pool
Looking at the source code, the MCU reads three different voltages: 3.3v, 1v, and PWR_MAIN (12v). The 3.3v is being fed to the MCU through a voltage divider (/2) and also with the 12v (except with a /10 divider). I wonder which of these voltages is cgminer trying to report.
You mean "looking at" cgminer's source code? Somewhere there is the printf that outputs that metric, stored in a variable being fed the reference value upstream from there. Given BFL's doc push of the last days, couldn't it be determined that way?
my jalapeno voltage varied with temp.
3.4v @ 44 C
3.1 v @ 30 C
3.4v @ 44 C
3.1 v @ 30 C
Man who came up with 92
No you can see MySpace if you look closely. I just upgraded to ega.
Help! I cut my finger and broke the fan. What size is the fan? !
80, 92 or 120mm. Just measure across one dimension, external edge to edge. Help! I cut my finger and broke the fan. What size is the fan? !
Thanks.
Ps the fan is 92mm https://forums.butterflylabs.com/jalapeno-single-sc-support/2932-jalapeno-fan-stopped-working-4.html
Ps the fan is 92mm https://forums.butterflylabs.com/jalapeno-single-sc-support/2932-jalapeno-fan-stopped-working-4.html
Looking at the source code, the MCU reads three different voltages: 3.3v, 1v, and PWR_MAIN (12v). The 3.3v is being fed to the MCU through a voltage divider (/2) and also with the 12v (except with a /10 divider). I wonder which of these voltages is cgminer trying to report.
No you can see MySpace if you look closely. I just upgraded to ega.
Help! I cut my finger and broke the fan. What size is the fan? !
Help! I cut my finger and broke the fan. What size is the fan? !
Yes I use this app on my vintage computer
Yeah, but that CRT isn't CGA, is it? It looks like text-only to me.
Yes I use this app on my vintage computer
When HP was known for excellent and stable computers, they would frequently underclock models, and sell say 25Mhz computers with 33Mhz CPU's. Doubt they do that today. 
You probably also remember that, in the days before functional graphics IDE's, vendors provided apps using underclocking and nop's to get things slow enough that you could watch what was happening, even in the days when the answer to that was "not very much."EDIT: Actually, I think that machine in bitpop's avatar might have one of them apps.
Where's Sherlock
I'm wondering what that voltage is also. Mine is in the 3.8v range in cgminer. It's not any of the voltage rails because I measured them all with a multimeter and they were pretty much spot on.
I switched power supplies around and same result. Vrm inside shouldn't vary this much. Imagine what the chip is getting if the vrms are this bad.
I looked at the info from BFL and the chips themselves only use 1V, so I'm not sure what that's reading.
Good catch. I was actually wondering from what point in the circuit that reported voltage was being read. 
I looked at the info from BFL and the chips themselves only use 1V, so I'm not sure what that's reading.
Edit: Just looked at the schematics again and the 3.3V power is for the AVR etc, and I think it's just created with a voltage divider, so I wouldn't expect much power regulation from the wall warts. The 1V chip power comes from a regulator, so that should be good. I'm not sure why they didn't use a 3.3V regulator for the other ICs.
Edit: Just looked at the schematics again and the 3.3V power is for the AVR etc, and I think it's just created with a voltage divider, so I wouldn't expect much power regulation from the wall warts. The 1V chip power comes from a regulator, so that should be good. I'm not sure why they didn't use a 3.3V regulator for the other ICs.
I couldn't find screenshots to compare to but I have two abd their voltage are very different! Chips aren't supposed to vary this widely.
What about time series on the two chips themselves? Variation between different revs (subject to any requirements elsewhere in the circuit) is not necessarily a problem.It's pretty clear that BFL has put some significant redesign B,S,&T into the Jally, no?
Something is way way way way way wrong there.
True the speed changes but a 25% difference in vrm voltage is insane when a chip needs that dead stable.
Thanks. I guess I have to wait for more people to post pictures. Man imagine an Intel varying like that. I don't expect quality but I don't expect some to fail very quickly.
If you check in the hardware-section, you will see that GPU's also vary in delivered speed, not only between different models, but exact same cards with several % variance.
Not sure how it's done now, but in the olden days Intel tested each CPU, and branded them according to stable running speed. Hence overclocking got started. Actually moderate overclocking is about "using up" the safety-margin that is normally built into chips.
When HP was known for excellent and stable computers, they would frequently underclock models, and sell say 25Mhz computers with 33Mhz CPU's. Doubt they do that today.
Thanks. I guess I have to wait for more people to post pictures. Man imagine an Intel varying like that. I don't expect quality but I don't expect some to fail very quickly.
I couldn't find screenshots to compare to but I have two abd their voltage are very different! Chips aren't supposed to vary this widely.
http://imgur.com/uRVktSd
http://imgur.com/uRVktSd
Guess they are not supposed to, but then again it may be chips with two slightly different designs.
AFAIK there are fairly large quality-differences in the chips, the jalapenos might even have been individually tuned to deliver around 5 Gh/s.
Could be fun to see if you get different hashrates with/without the box and flipping the fan (apparently they suck the air up, whereas some says it's better to have the fan blow down at the heatsink.)
Testing different heatsinks might also be fun.
I couldn't find screenshots to compare to but I have two abd their voltage are very different! Chips aren't supposed to vary this widely.
http://imgur.com/uRVktSd
http://imgur.com/uRVktSd
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