Post
Topic
Board Hardware
Re: Block Erupter USB - Overclocking/ hacking ?
by
mjgraham
on 27/08/2013, 20:14:11 UTC
Well didn't get as far as I wanted to today, I am running at 22.12 Mhz 1.65V and 4.8A going to let it run tonight, I want to get to 2x speed, I am worried thought the next step in the graph shows the voltage being 1.8V, Heat is the main problem, or I guess the area the heat comes out at, I mean the P4 heatsink I am using is rated for 125W and I am putting 8W in so it only raises 2 deg. F with the fan on but the area under the chip is quite hot. So far I really have tried to keep all as stock on the cooling, I have not removed the solder mask and using the stock thermal pad. I did try a peltier today but I feel that has to be watched to closely, something goes wrong you got either a fire or ice ball. Although I don't know if you could cool the heatsink the BE was mounted to if that would help. At any rate 1 Hr at 22.12 Mhz I have.  

A:130 R:0+0(none) HW:11/2.2%

first time I have seen this

[2013-08-27 15:31:58] Staged work underrun; increasing queue minimum to 2

Maybe I will be done tomorrow.
Thanks

Update. Latest test run


Summary of runtime statistics:
                   
 [2013-08-27 20:06:00] Started at [2013-08-27 14:42:40]                                 
 [2013-08-27 20:06:00] Runtime: 5 hrs : 23 mins : 20 secs                   
 [2013-08-27 20:06:00] Average hashrate: 631.1 Megahash/s                   
 [2013-08-27 20:06:00] Solved blocks: 0                   
 [2013-08-27 20:06:00] Best share difficulty: 10.1k                   
 [2013-08-27 20:06:00] Share submissions: 702                   
 [2013-08-27 20:06:00] Accepted shares: 701                   
 [2013-08-27 20:06:00] Rejected shares: 1 + 0 stale (0.00%)                   
 [2013-08-27 20:06:00] Accepted difficulty shares: 2792                   
 [2013-08-27 20:06:00] Rejected difficulty shares: 4                   
 [2013-08-27 20:06:00] Hardware errors: 63                   
 [2013-08-27 20:06:00] Network transfer: 462.6 / 110.7 kB  ( 23.9 /   5.7  B/s)                   
 [2013-08-27 20:06:00] Efficiency (accepted shares * difficulty / 2 KB): 9.97                   
 [2013-08-27 20:06:00] Utility (accepted shares / min): 2.17/min
                   
 [2013-08-27 20:06:00] Unable to get work from server occasions: 0                   
 [2013-08-27 20:06:00] Work items generated locally: 6782                   
 [2013-08-27 20:06:00] Submitting work remotely delay occasions: 0                   
 [2013-08-27 20:06:00] New blocks detected on network: 35
                   
 [2013-08-27 20:06:00] Summary of per device statistics:
                   
 [2013-08-27 20:06:00] ICA0       | 5s:374.2 avg:630.9 u:618.1 Mh/s | A:701 R:1+0(.14%) HW:63/2.2%                   
 [2013-08-27 20:06:00]