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It appears that when I change the thermal pad to thermal paste, the engines are able to startup better.
E.g. When using the default thermal pad
Both my jallies will not start with more than 28 engines running. And at times, it will drop to 26 or less.
After replacing the thermal pad, my engines is always 29 and is at the same HW error rate of 4.5%.
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Received with thanks!
Will place another order soon.
Regards
EP
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Is that 10 shares pledge from the previous GB? If so, please change it to 1 please. If not, I'll get 1...
Thanks
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Which part of china you are located? can arrange pick up?
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I am willing to help anyone who needs to flash the jallies if they need it. And it's locate in singapore  * I am not responsible for any damage done * |
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has anyone check on the engines of the LS using java API stats for cgminer? Quite interested to know the info there....  |
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My latest setup after I found a 2nd hand heatsink. Managed to bring it down by 2°C and make it lesser HW error. Using the cable tie trend, managed to put them together    |
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How many engines are running? You can check using cgminer --api-listen and java API stats.
Post the results here and i can see from there....
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You can trust them if time isn't a contributing factor for this trust...
2GHz? or 2GH/s? I only know one USB miner that is target to do 2GH/s with bitfury chip and still under development...
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If I change the fan orientation while powered down, it will never get to 8.5 GH/s after powered. If I change the orientation while it's already hashing at 8.5 GH/s, it will soon start to slow down towards 7.7 GH/s (while temps and voltages drop too). I didn't notice any changes in the engine counts / clocks reported by the API, but should check that again... Currently the stats are: PROCESSOR 3: 15 engines @ 287 MHz PROCESSOR 7: 15 engines @ 281 MHz THEORETICAL MAX: 8520 MH/s ENGINES: 30 FREQUENCY: 274 MHz
(Yes, I have customized that output with preg_replace to cut the crap. BTW, what's FREQUENCY?)
I'm getting around 80C readings from the VRM area with a handheld IR meter. Any idea if that's good or bad?
The frequency is based on what you have set for your __ASIC_FREQUENCY_ACTUAL_INDEX in the std_def.h. So basically you have set the index to 7 i assume? The stats report does not re-test the chips again. It is based on a memory in the jally that is written during the initial boot test. When the jally is booted up, it will run some tests to determine the frequency of the engines. Once the jally found the best frequency, it will write to a memory and "java API stats" merely just retrieve this info from the memory Not sure about the temperature but my jallies never go above 50°C. I'm always trying to make the jallies cooler (next project is to find a heat sink for my jallies and do some customization to it) and the right rule of thumb is, the cooler the better. You got a pair of good chips (i hardly can get 29 engines running on either jally...) *jealous* lol |
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now you still can do the same for scrypt mining |
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Nice. But I rather build one myself. That's where all the fun is. Awaiting for my 5 BE to arrive and I will try to overclock it |
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If I am not wrong, ckolivas version of firmware will force all engines to be running.
Flash it back to 1.2.5 or 1.2.6 (some settings need to be changed) and it should be fine.
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I finally flashed my Jalapeno, and it's now running at 8.5 GH/s (was 5.7). However, if I try to turn the fan around, so that it's blowing air to the heatsink instead of sucking from it, the hashing speed starts to drop, and settles at around 7.7 GH/s.
With the original fan orientation, it's running at 8.5 GH/s, 62C and 3.85V. If I turn the fan around, those numbers drop to 7.7 GH/s, 50C and 3.55V. Haven't tried closing the casing after doing the OC.
Did you turn the jallies off when u flip the fans? When you turn off the jally, it will test the engines again on both chips. At some times, you will have more engines running. I normally use CGMiner --api-listen and do a "java API stats" to look at how many engines are running... In theory, you will need 15 engines to be running on both chips at at least 280mhz to achieve 8.5GHz.... |
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Yes. It is done in the firmware. There's a threshold for the temperature of overheating and the engine will restart if it overheats... Check out the source codes  |
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And yes it is possible. My Jala flashed with CONTAMINATION firmware is doing 8,6MH... Jala was 6,5 stock(2 GH upgrade), upgrade to 1.2.5 was 7,3 and doing what was suggested in in this forum in "Experimenting with Jalapeno firmware..." got it to 7,8...
GH/s you mean? what is the frequency on the cointamination firmware? |
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Respect those who hack the BE. *bows*
Following
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