Methods for improving USB Miner speeds/cooling?

[hotwired007]

is there any definitive ways of improving the hash rates of the USB Block Erupter?

I have mine running with a fan blowing over them and they are running between 332 and 335 using CGminer 3.1.0 happily (>60000 Shares - 500 HW errors)

Ive seen a post where someone has insalled a small heatsink on top of one of the chips on the top but i cant tell if this would have helped or not - i have some copper ram heatsinks that i bought to go on my Pi CPU (i have 7 spare) is it worth putting these on - i also assume that this could invalidate the warranty on the USB asic?

any other recommendations?

[turtle83]

Nobody has found a way to overclock these things. Atleast publicly. Also i think thats not possible without hardware modifications.

The only thing better cooling does is reduce hardware errors, this increasing the effective hashrate... Your error rate is already below 1%. I doubt you can get significant gains by running it cooler. The only advantage of such heatsink mods is they potentially increase the life of these devices. Also the geek factor.

[whitefeather]

USB Block Exploder?

 

[namzycad3]

ziplock the usb and chuck it into the freezer, get a cheap laptop and connect it via cable

[turtle83]

ziplock the usb and chuck it into the freezer, get a cheap laptop and connect it via cable

Nah risk of condensation. Mineral oil emersion! and run the oil the thru a heat exchanger which is placed inside the freezer...

[hotwired007]

ziplock the usb and chuck it into the freezer, get a cheap laptop and connect it via cable

Nah risk of condensation. Mineral oil emersion! and run the oil the thru a heat exchanger which is placed inside the freezer...

isn't that a bit too much effort? i ahve a fan that cost £1 blowing over my miners atm and that seems to be doing to job of keeping them cool

i wondered if i got them cooler if it would make any difference - apart from extending the life of them

also which side should be exposed to the fan - back (heatsinked) or front (open circuitry)?

[dmatthewstewart]

I dont even know what a  USB Block Exploder is. Just Googled it and got this thread and some irrelevant youtube videos

[hotwired007]

I dont even know what a  USB Block Exploder is. Just Googled it and got this thread and some irrelevant youtube videos

should be USB block Erupter - not exploder typo in the OP - will correct it

[pvtbrutus]

For some reason my 5 usb eruptors have way less errors since i dropped all gpus in my setup. Went from 1% HW errors to 0,01%.

Things that maybe contributed to that is a Jala 5Gh joined and i switched to cgminer 3.2.2 at the same time. Also my pool is pushing diff 4 shares to me now.

[Polyatomic]

How long would a Block Erupter last at 100% uptime ? (without cooling)

[turtle83]

How long would a Block Erupter last at 100% uptime ? (without cooling)

Been 4 days continuous since my last cgminer restart. Even before that the restarts were not due to errupters.

3 units. ~3% error rate. No fans. 2 of them are one above the other, very close. Those 2 have slightly higher error rate than the other one.