Compaq Asicminer getting really slow after some time

[meelmo]

Hi, I am using my new USB Asicminer block erupter which has a hashrate of up to 16gh/s. After setting up everything with USB to UART Bridge VCP drivers it started working perfectly with BFGMiner with around 12gh/s, which was fine. It was getting hot so I used a usb driven fan to cool it.

After an hour I came back and noticed that the hashrate fell down to 6gh/s and slowly went down more and more. It was getting lower and lower but also falling down slower and slower. I tried another computer, but the same thing: After a few minutes the hashrate steadily got lower. Also the miner doesn't blink with its blue light as it did when it worked heavily, it's also not hot at all any more. Does anybody know what to do to keep the hashrate up?

Clock speed is set to 200 as suggested by BFGminer for compaq devices. Also the results are the same wheter I use the USB 3.0 ports directly on the computer or a fast external USB hub.

Thanks in advance.

[gt_addict]

Have a read through this thread:-

https://bitcointalk.org/index.php?topic=1173963.0

It should have a vast array of answers for you. If not then post in there and someone will be able to help you.

In that thread there is a download for a specific version of cgminer which works well with the gekko. I haven't tried it on gfgminer personally but its a lot easier on cgminer as the .bat file is easier to write rather than using the different "codes" for the freq. I would suggest a mains powered hub for it and a USB Y spliter cable so you are getting enough power to it and not trying to pull too much from one port.

[philipma1957]

Hi, I am using my new USB Asicminer block erupter which has a hashrate of up to 16gh/s. After setting up everything with USB to UART Bridge VCP drivers it started working perfectly with BFGMiner with around 12gh/s, which was fine. It was getting hot so I used a usb driven fan to cool it.

After an hour I came back and noticed that the hashrate fell down to 6gh/s and slowly went down more and more. It was getting lower and lower but also falling down slower and slower. I tried another computer, but the same thing: After a few minutes the hashrate steadily got lower. Also the miner doesn't blink with its blue light as it did when it worked heavily, it's also not hot at all any more. Does anybody know what to do to keep the hashrate up?

Clock speed is set to 200 as suggested by BFGminer for compaq devices. Also the results are the same wheter I use the USB 3.0 ports directly on the computer or a fast external USB hub.

Thanks in advance.

don't know much about running it on bfg miner  I run my 12 on cgminer adapted to gekko compac sticks.

What external hub did you use?

hint a   y-cable  should help you

What windows do you use?

hint it works better on windows 7

i run mine on linux

[meelmo]

Have a read through this thread:-

https://bitcointalk.org/index.php?topic=1173963.0

It should have a vast array of answers for you. If not then post in there and someone will be able to help you.

Thanks a lot for that hint. How come I didn't find this thread before? I swear I was searching through the forums before   

don't know much about running it on bfg miner  I run my 12 on cgminer adapted to gekko compac sticks.
What external hub did you use?
hint a   y-cable  should help you
What windows do you use?
hint it works better on windows 7
i run mine on linux

Thanks for your answer. Looks like everybody recommends cgminer. By reading several threads before I thought bfgminer would be the better option but in this case I'll give cgminer a try.

-I'm using an EasyAcc H40 USB 3.0 Hub. Now I changed my setting and the mining stick is directly on the computer, only the fan is on the Hub. This works a bit better, but for some reason bfgminer stops working sometimes. After restarting it works again, just sometimes "no response". Could these issues correlate somehow? Anyway, I'll give it a try with cgminer anyway.

-What exactly do you mean by the y-cable could help? Where's the difference between a y-cable and an external usb hub? I guess the cable needs "less power", is that it?

-I'm using Win 7, didn't try it on my Ubuntu distribution so far.

[gt_addict]

I wouldn't run the gekko stick directly on your computers USB ports. You could end up causing damage.

You WILL need a mains powered usb hub and the Y cable.

Search for this EBAY number :- 231892484263

It's got two male usb ends that both go into one female end (the end where the gekko goes). One side of the cable is data and power and the other is just power so you can be sure the gekko gets power from two ports not just one.

[meelmo]

You WILL need a mains powered usb hub and the Y cable.

Search for this EBAY number :- 231892484263

It's got two male usb ends that both go into one female end (the end where the gekko goes). One side of the cable is data and power and the other is just power so you can be sure the gekko gets power from two ports not just one.

Thanks for that information, I got it now. But a good USB hub with external power supply would replace that cable anyway, right?

[fanatic26]

Yes a powered external hub is the way to go.

[philipma1957]

You WILL need a mains powered usb hub and the Y cable.

Search for this EBAY number :- 231892484263

It's got two male usb ends that both go into one female end (the end where the gekko goes). One side of the cable is data and power and the other is just power so you can be sure the gekko gets power from two ports not just one.

Thanks for that information, I got it now. But a good USB hub with external power supply would replace that cable anyway, right?

Maybe depends on the hub.

The majority of hubs are  short on power and need a y cable to get the stick to run at 250 or higher.

[notlist3d]

You WILL need a mains powered usb hub and the Y cable.

Search for this EBAY number :- 231892484263

It's got two male usb ends that both go into one female end (the end where the gekko goes). One side of the cable is data and power and the other is just power so you can be sure the gekko gets power from two ports not just one.

Thanks for that information, I got it now. But a good USB hub with external power supply would replace that cable anyway, right?

Maybe depends on the hub.

The majority of hubs are  short on power and need a y cable to get the stick to run at 250 or higher.

You can get them pretty cheap to on ebay.   I know I ordered a set I think from China and had to wait but it was very cheap per cable.  With getting the Y cable you can get a lot more out of the compacs they are pretty amazing on OC'ing.

[meelmo]

Thanks for all the helpful hints, I really appreciate it.

I will try out all the tips and tricks soon but so far I still don't get why exactly the Y-cable would be a better/worse choice than the powered USB hub? The Y-cable gives more power to the stick and transmittes its data, okay. But the powered USB hub does the same, right? I mean it gives extra power by being extra powered  Yet the Y-cable can pull even more power when the stick is being overclocked, did I get that correctly? Sorry for the redundancy, I just want to understand where the advantages and disadvantages are within both setups.

[gt_addict]

Personally I use BOTH. The mains powered USB hub (5 data/power ports & 2 charging ports). I did have it set up so that one side of the Y cable is in a charging port and the other side is in a data/power port. That way you know the gekko is getting enough power and you won't risk burning out your USB ports in your laptop/computer.