Miner running Slow

[RPBCoiner]

I have a brand new Block Erupter that should be mining at roughly 30 GH/s but so for some strange reason I never see it go above about 22 and I can not figure it out.  I have tried several things.  using different pools, using local and hosted proxies in all different combinations, but still I never get anywhere near the speed I would expect  Any pointers would be great.   

Currently I have it setup with a local proxy running off a Ubuntu laptop as the primary and a hosted proxy as the secondary.  I have it load balancing between the two because I have noticed that if I leave it to any local proxy that the Cube rebooted every 2 minutes and 45 seconds like clock work. It gets work and then it slowly finishes each job and the ASIC sits idle until the block reboots.  The local has been setup both on a windows 7 machine as well as the Ubuntu laptop with the same result.  As soon as I add the hosted proxy no more reboots but I am still stuck with 22 GH/s instead of the 30-38.  Below is An example of what I mean.

BE Cube V9.17 ASIC GT (Proxy, Auto Longpoll support)

ASIC_01-16: O O O O O O O O O O O O O O O O
ASIC_17-32: O O O O O O O O O O O O O O O O
ASIC_33-48: O O O O O O O O O O O O O O O O
ASIC_49-64: O O O O O O O O O O O O O O O O
ASIC_65-80: O O O O O O O O O O O O O O O O
ASIC_81-96: O O O O O O O O O O O O O O O O
M_01-16: 205 252 219 229 270 301 231 268 258 279 275 262 273 287 252 232
M_17-32: 265 266 233 259 279 185 230 238 237 198 232 191 192 225 210 231
M_33-48: 193 203 233 232 229 210 222 232 225 201 209 260 210 279 221 186
M_49-64: 248 195 208 185 243 179 229 220 193 220 198 231 212 184 225 224
M_65-80: 190 214 222 197 205 185 195 178 176 193 205 196 196 215 186 170
M_81-96: 241 210 193 221 224 167 191 213 218 209 227 127 218 172 207 157
Jobs:0000020429 Accepted:0000017388 Rejected:0000000235 (1:4) F1 F2 F3
MHS:21068 Utility:288 Efficieny:085.11%
Started before: 0d,01h,00m,24s
Current pool: 10.0.0.221 (A)
Switch mode: Equal priority
Clock selected: Low
Long Poll: active, LP requests: 10
IP 10.0.0.33   
Mask   255.255.255.0
Gateway10.0.0.252   
WEB Port   8000
Primary DNS   10.0.0.252
Secondary DNS   8.8.8.8
Pool ports   8332,8885
Pool addresses   10.0.0.221,eastcoastbtc.cloudapp.net

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[Kasandra]

This may be a cooling issue.

[RPBCoiner]

I am not sure how that could be?  The box is pretty cool to the touch.  Fan is working perfectly and I only feel some light heat flowing out of it.  Not much at all.  In fact I just checked and there is less heat coming out of the Cube then there is coming out of a server that is sitting a few feet away.

I was also wondering about the actual power draw and for a while moved it into another part of the house that is one a different circuit and in fact one that has almost nothing on it and I was still getting slow performance

[RPBCoiner]

I have been playing with the cube for a day or two now and I may be getting close to why the unit is running slow, but it would be helpful if anyone with more experience can point me in the right direction.

Right now I have the cube running thru 2 local proxies so I can try and see what is going on.  Both are running BFGminer ver 3.8.0. I have noticed that the hardware errors on the proxy are both about 25%  See below as an example.

 bfgminer version 3.8.0 - Started: [2013-12-24 00:45:12] - [  0 days 01:30:47]
 [M]anage devices [P]ool management Settings [D]isplay options  [H]elp [Q]uit
 Connected to stratum-lb-usa48.btcguild.com diff 32 with stratum as user rpform_
 Block: ...42bcbf9f #276684  Diff:1.18G ( 8.45Ph/s)  Started: [02:08:58]
 ST:11  F:0  NB:7  AS:0  BW:[ 41/  7 B/s]  E:50.88  I:92.25uBTC/hr  BS:3.17k
 1            |  0.78/ 5.35/ 5.30Gh/s | A:207 R:0+6(.18%) HW:2339/ 26%
--------------------------------------------------------------------------------
 PXY 0:       | 25.27/ 5.35/ 5.30Gh/s | A:207 R:0+6(.18%) HW:2339/ 26%
--------------------------------------------------------------------------------


I am not sure where to look for the source of the problem at this point since both machines are seeing the same thing

[infinitybo]

No one knows anyways perhaps your internet is lagging.

[testbug]

@RPBCoiner

Did you actually try another BTC-Pool? Mb the pool is haveing some hard times with many new miners and is busy.
Otherwise i would turn down those 2 proxies cause they could slow down everything.

If that didnt help me, feel free to post here again, i'll try helping you =)

*edit*
Mb it is your mining software that is haveing some issues.
Did you try cgminer already? For me, its simply the best mining software.

[RPBCoiner]

I have tried both BTC Guild and Slushes with the same result.  I have used BFGminer as a proxy and also used the on one Slush's site, however I have been having trouble getting cgminer to work as a proxy.  I do not see where I can set the proxy port that the Cube communicates through.

Thanks for the ideas to look into.

[bladech]

I've the same identical problems.

Maximum hashrate 23 gh/s... in High clock, in low clock 20 gh/s.

I also opened the case and add a cool fan, blades are very very cooled.
I also write to seller attaching screenshot of getwork proxy. He said that it is a power issue... that PSU don't give enough power.
I also changed 3 PSU.. but still the same.. also using 2 different PSU at the same time (one piece for every PCI-E 6 pin connector)

[testbug]

Which version of cgminer did you use? you need a new version for full support of asic miners.

Try to "ping" your miner. Latency times shouldnt be higher than 1-5ms i think.
Mb the wire is broken? Dunno, but some easy stuff you can check.

Regards.

[RPBCoiner]

It appears I have figured out my problem.  It was all power related by the looks of it.  I have a lot of power hungry equipment(non-mining) and they appear to have been using a good chuck of the power that the miner needed.  I re-located the miner to another area that I was certain was on a completely different electrical circuit and my speed became a lot better.  Still not the 30 GH/s but getting at least 26 of the past 2 days.  I have a 900 watt UPS that will also clean the power on the way so I am going to try and running it through that and see if more stable power might help.

[alternatif12]

It may not be all power related. There could be many reasons why it doesn't hash at 30 g/hash. When I start using cube my stratum proxy was on raspberry pi, and I wasn't even getting closer to 30 g/hash. Investigating further I realized stratum proxy on raspberry eats 100% CPU all the time therefore reduces efficiency of the cube.

I installed stratum proxy on windows 7 which has a better cpu and now I am able to hash 38 g/hash when overclocked.

Here is the link to the stratum proxy I use: http://mining.bitcoin.cz/mining-proxy-howto

Give it a try and post your results.

Hope it helps.

[jbbasics]

I would try using slush's mining proxy and try mining with slush. I have had good luck with this method using no mining software. I get 38.6ghash on each cube overclocked with 2 cubes on a 750W corsair PSU. I have noticed that if the ambient temperature is even warm that this drops closer to high 37ghash. I keep a floor fan on the cubes and it definitely helps. I have noticed connection issues with bitminter but none with slush. Hope this helps.

[RPBCoiner]

Thanks for the info....I have tried a few other things and it is just strange.  I had it running at roughly 26k and then all of a sudden it dropped to maybe 18k.  Right now I have it back at about 24k.  I thought that maybe power has something to do with it but I feel less so now.  I added the power supply to a dedicated UPS with clean power but it still runs no where near 30k.  At to that I have a antminer sitting right next to it.  That unit is running right at the 180GH/s that it is rated and that unit is only running off of a 520w power supply.

I dso not think it is cooling....I even opened the window in the room that it sits in and it is about 20 degrees outside so it made that room nice and chilly.  Had a ceiling fan as well as a 9 fan rack cooling system blowing threw it.  When I added that 9 fan unit into the mix, the antminer showed a 5C drop but the block erupter cube just kept at the same speed.

Both units are using the same pool but with different worker accounts (BTCGuild) the only real difference is that the antminer can work directly with BTCGuild where the cube is using a proxy.  I have tried several proxy's.  local and hosted by all the different miners and nothing seems to change.

One question I do have from everyone...on the Corcair 750 It came with only the single jumper for the 6 pin power but it does split to two outputs from the single power input.  Is that how other have it setup or do they plug into more then one port on the power supply...(aka 1 to 1 connections)

[jbbasics]

Not exactly sure what you mean...the Corsair TX750 has 4 different 6pin pcie connectors. I have 2 going to one cube and 2going to the other. Plugged directly into the cube. The cube came with a jumpstart connector to keep the PSU on at all times. This is just a blank plug that goes onto the 24pin connector. There should be no modifications needed.  Hope this helps.

[mwd123]

I had the same issue until I pressed "mode" button and hit update, and made sure it was Switch mode: Primary/Backup afterwards.. having it on equal priority gave me very bad speeds.

BR