In other words: which is the better miner, when- hashing on same speed (1,1-1,3 TH/s)
- powering 2 units by one of these PSUs
- having the same prices per unit to me
- regarding the noise
Appreciate your help.
...
- can be undervolted to 10-11V to achieve even better efficiency - in the range of 900/360 (SP20 doesnt really get any better than 900/420). This requires uncommon 12-10V voltage regulators though and generally there's 5%+ losses in doing so
What was the lowest voltage someone has verified the chips start at? I had a look at getting a variable PSU in but they were stupidly expensive.
someone tinkered with it and found it really wasnt stable or capable of the advertised 9V = ~0.25w/gh, and that the lowest settings were somewhere around 10.5V or ~0.4w/gh. I almost want to say it was phillipma, but am not 100% i think its in one of the S5 review unit threads
MR Teal got 9.6 or 9.7 volts
it is on these threads somewhere. sidehack is working on a plug n play adapter for a standard atx psu should go to 10 volts and be solid. still waiting for one for testing.
Right now the sp20 is the plug n play choice. the s-5 is the choice if you want to get your hands dirty.
1x 11 dollar delta fan which can run pwm via splice to a pwm will overclock to 1275gh okay for noise 60db
or splice to molex 7 volt will run stock at 1150gh pretty quiet 53db