Archive for the ‘Tests and Reviews’ Category

1gh-pts-mining-profitability

After trying out PTS mining at ypool we have also decided to try out another Protoshares mining pool with CPU mining to see if we are going to get better results with the Round-Based Pay Per Share (RBPPS) payment system and the lower 3.5% fee that the 1GH PTS mining pool has. We’ve been testing the pool with GPU miners lately, however for the last 24 hours we tested only with CPU miners to see what profit we are going to get.

The two CPUs we’ve used for mining are:
– Intel Core i5 2500K Quad Core 3.3 GHz
– AMD Phenom II X6 1100T Six Core 3.3 GHz

The 1GH pool we used for PTS mining has:
– 3.5% fee

The total earnings for 24 hour period (confirmed + unconfirmed):
– 0.1169 PTS

The value of the Protoshares mined for 24 hours is as follows:
– 0.00173806 BTC
– ~$1.38 USD

The profit we got from the 1GH PTS mining pool was a bit higher than the one we’ve managed to get for 24 hours at ypool, however the difference in USD is also affected by the BTC/USD and PTS/BTC exchange rates. What is clear however is the fact that there is not much point in mining Protoshares (PTS) with CPU at the moment, if you plan on mining Protoshares then you need to think about going for GPU mining. The 1GH Protoshares mining pool has a very good performing GPU miner that works on both AMD graphics and Nvidia graphics very well. Furthermore the 1GH pool has another advantage over ypool and that s the fact that this pool sends automatically your earnings as long as they are over 0.1 PTS confirmed and in ypool the minimum is 1 PTS.

bitmain-antminer-s1-200-ghs-overclock

The Bitmain AntMiner S1 Bitcoin ASIC miners are shipped at 180 GH/s default hashrate and they do support easy overclocking to about 200GH/s or a little over by increasing the operating frequency of the chips that is set at 350 MHz by default. Increasing the frequency to 400 MHs seems to be the most common solution to overclock your AntMiner S1 in order to get about 200GH/s hashrate, however that leads to an increase in the number of HW errors that you are getting. Now, it is completely normal to get some HW errors for an ASIC, especially overclocked one, but the percentage value should be fairly low if everything is normal.

When you login to the Bitmain AntMiner S1 web interface and open the Miner Status page you have a field called HW, this field may show a high value, but in order to calculate the actual percent of the HW errors you need to use a special formula and not directly compare the number in the Accepted and HW fields as they may show similar numbers getting you to think that you are getting way too many errors when that is not the case.


AntMiner S1 HW Error Calculation Formula:

HW / (diffA + diffR + HW) * 100


By using the formula above we can calculate that our miner has:

1937 / 1747537 * 100 = 0.11% HW Error Rate

0.11% is a very acceptable HW Error percentage for a Bitmain AntMiner S1 ASIC overclocked to provide about 200 GH/s hashrate. That is however the case with our settings using 393 MHz overclock frequency of the chips with an average of 201.55 GH/s hashrate. If overclocking to 400 MHz we are getting a little bit of a GH/s increase, however the HW Error rate also goes from 0.11% to a little more than 1%, so no point pushing the clock of the chips to 400 MHz in our opinion.

In order to overclock your Bitmain AntMiner S1 ASIC to provide 200 GH/s and low HW Errors rate with our settings you need to follow the steps below:
– Login with SSH to your AntMiner S1 ASIC using the IP and username/password you’ve set it to use.
– Type “cd /etc/config” (without the quotes) in order to get to the folder where the config file is located on the miner.
– Type “vi asic-freq” (without the quotes) to edit the config file, comment the currently set options by placing # in front of them and add the following lines or directly replace the values with the following ones:

option ‘freq_value’ ‘5f05’
option ‘chip_freq’ ‘393.75’
option ‘timeout’ ’36’

– Save the changes you have made and type “reboot” (without the quotes) to restart the miner, so that it can apply the new settings and start mining at 200 GH/s with the overclock settings you’ve set.

protoshares-ypool-cpu-mining

Here is our real world 24 hour test with mining Protoshare (PTS) with CPU only in order to get an idea what profitability you can expect with the current market price for PTS. We’ve used two CPUs – one AMD and one Intel on systems that already mine Scrypt coins with video cards the idea to not waste the CPU performance we have available since Scrypt mining with GPUs does not require a lot of processor power.

The two CPUs we’ve used for mining are:
– Intel Core i5 2500K Quad Core 3.3 GHz
– AMD Phenom II X6 1100T Six Core 3.3 GHz

The pool we used for PTS mining is ypool:
– 5% fee

The total earnings for 24 hour period (confirmed + unconfirmed):
– 0.10423418 PTS

The value of the Protoshares mined for 24 hours is as follows:
– 0.00138917 BTC
– ~$1.10 USD

The end result is quite interesting as the profitability we got in USD is pretty much the same as the one we’ve managed to get in our Primecoin (XPM) mining test for 24 hours with the same CPU hardware. A bit over a dollar a day pretty much covers the extra increase in power usage, so the real profit minus the expenses is minimal. But there seems to be GPU miners already available for PTS, so the next thing is to try out these and see if it is worth to mine PTS on the GPU or there is no point since scrypt mining on the GPU will be more profitable.


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