Topic: ANTMINER S5: 1155GH(+OverClock Potential), In Stock $0.319/GH & 0.51W/GH - page 246. (Read 451048 times)
January 05, 2015, 12:09:56 PM
Are there any s-5 coupons? I saw something about s-5 coupons can't find it now.
January 05, 2015, 12:03:23 PM
is this unit more louder then SP20?
No. If SP 20 fan speed is set to 20% and speed 1150GH/s, it is much quieter than Antminer S5
But you can use the S3-S5 modification https://bitcointalksearch.org/topic/bitmains-refused-from-s9-warranty-buy-at-your-own-risk-914354
January 05, 2015, 11:45:51 AM
at 150 cfm, I have four of these on my each of my s2's. They are extremely quiet. They move air like hair driers.
http://www.ebay.com/itm/Dell-Foxconn-PV123812DSPF-01-Computer-Cooling-Case-Fan-120mm-x-120mm-0NN495-/261714332484?pt=US_Computer_Case_Fans&hash=item3cef63cb44
http://www.ebay.com/itm/Dell-Foxconn-PV123812DSPF-01-Computer-Cooling-Case-Fan-120mm-x-120mm-0NN495-/261714332484?pt=US_Computer_Case_Fans&hash=item3cef63cb44
January 05, 2015, 11:39:53 AM
is this unit more louder then SP20?
Its subjective but I believe both out the box the SP20 is 'louder' due to the quality of the noise. S5 is loud, but its moving air + a moderate whine noise - identical an S4. Stock SP20 noise is unique, I can't really compare it to anything else.
January 05, 2015, 11:18:14 AM
is this unit more louder then SP20?
January 05, 2015, 11:12:41 AM
undervolting on PSU level is indeed a point I missed before. Are there any DIY? 
Or is efficiency directly degraded after modding?
Or is efficiency directly degraded after modding?we have a forum member that is well respected working on a plug in 'pot' type device.
plug in a plat psu at 12 volt and 92 % out comes an 87% 9 volt pcie jack.
since the power should reduce greatly that loss will be okay.
ie .52 drops to .32 / .87 = .36
or you can buy this
http://megawatt.us/ which will go close to 9.5 volts but is 80% so .32 / .8 = .4 per gh
this is all theory no one has demonstrated a s-5 running at 9-10 volts clocked to freq 225 or freq 250 to be stable.
January 05, 2015, 11:05:38 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
yeah if you don't have a place to hide the noise it is loud gear.
January 05, 2015, 10:56:13 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
replacing the stock fan with a single Noctua ($24.5 on Amazon) makes it much less loud and changes the metallic banging sound of the stock fan to whooosh, although temperatures rise to ~60C and you have to hash at 325 mhz(1075 GH). I am waiting for a second fan to add pull and go back to 350mhz or even higher.
http://www.amazon.com/Bearing-NF-F12-iPPC-3000-PWM/dp/B00KFCRATC
January 05, 2015, 10:46:10 AM
undervolting on PSU level is indeed a point I missed before. Are there any DIY? Or is efficiency directly degraded after modding?
Or is efficiency directly degraded after modding? January 05, 2015, 10:42:02 AM
Just tried to order two with BTC to the US. Couldn't! Appears to require I enter a mobile phone number, something I neither have nor need/want. What is this shit?
Phone numbers are required for the courier / customs, nothing else.
My two S5 will arrive on Wednesday so I was thinking as using my one "Cooler Master Silent Pro 1200W Gold PSU" for both. Will that work? Also whats the difference between Gold & Bronze i.e. which one draws less power?
Its not an amazing power supply, but it should do the job for now. Gold, silver, bronze, plat etc are efficiency standards that the PSU meets.
January 05, 2015, 09:08:24 AM
Actually, it may make sense for a LOT of people to be running these undervolted since ROI may actually be slightly better already which is kinda insane. Too bad it's so hard to actually undervolt these because if Bitmain's charts are correct 0.65V would drop power consumption per GH by about 40%. Guess it's time to start looking for 9V psus lol.
January 05, 2015, 09:00:34 AM
If BTC is now 260-270USD, difficulty seems going up, then S5 for price 401USD + shipping is very overpriced.
I wanted to buy around 30 units, but price have to be less then 350USD.
In all honesty the unit costs don't really matter so much as what your power costs and overhead are for running them, and the problem is that at current BTC prices and average hosting/power costs it would take a very long time to ROI and that's assuming BTC doesn't drop further and difficulty doesn't increase which are pretty bad assumptions.I wanted to buy around 30 units, but price have to be less then 350USD.
Honestly if you live in a place with super cheap power like Washington state and have your well ventilated naturally cooled warehouse or something then these would be great even at $401.
January 05, 2015, 08:35:08 AM
u may save more if u buy btc atm!
January 05, 2015, 08:34:12 AM
was thinking of buying s5 now im thinking ill jus save up $$ for them new miners coming in feb 
January 05, 2015, 08:31:11 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
take it apart and spread it, then cool each blade with 2 or more fans. try to keep the same temperature
January 05, 2015, 08:23:33 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
Someone did one for the S4 a while back by modifying /lib/modules/3.8.13/kernel/drivers/bitmain/bitmain_spi.ko. Not sure if this information will help.
January 05, 2015, 08:10:45 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
Locked mine up in the barn next door - I can think & sleep now......
January 05, 2015, 08:02:36 AM
If only I could find a meaningful way to make the hardware shut the fuck up though. I thought we got over noisy hardware... I have to turn this off overnight again. I added a fan to the back in a push pull configuration like the S3 and it only dropped the fanspeed one notch, hardly worth the effort. The lowest speed I can stably run this at is 275 and still the fan's too noisy for my liking. The driver code doesn't really do anything to fanspeeds which all seem to be controlled within the device's FPGA itself.
January 05, 2015, 07:36:45 AM
Here's a quick binary for the S5 based on bitmain's existing code which will ignore any queue parameter, not discard stales, should be able to ramp up smoothly if you find yourself on a very low diff pool, and use a little less CPU:
http://ck.kolivas.org/apps/cgminer/antminer/s5/4.9.0-150105/cgminer
Binaries will only be temporary so will not survive a machine reboot.
The following will change the cgminer binary for you (set the appropriate IP address), the default root password is "admin":
There should be a more comprehensive merge in the future into mainline cgminer, hopefully by Kano. Bitmaintech has provided us both with S5s to support cgminer development.
http://ck.kolivas.org/apps/cgminer/antminer/s5/4.9.0-150105/cgminer
Binaries will only be temporary so will not survive a machine reboot.
The following will change the cgminer binary for you (set the appropriate IP address), the default root password is "admin":
Code:
ssh 192.168.1.x -l root
cd /tmp
wget http://ck.kolivas.org/apps/cgminer/antminer/s5/4.9.0-150105/cgminer
chmod +x cgminer
mv /usr/bin/cgminer /usr/bin/cgminer.bak
cp cgminer /usr/bin
/etc/init.d/cgminer.sh restart
cd /tmp
wget http://ck.kolivas.org/apps/cgminer/antminer/s5/4.9.0-150105/cgminer
chmod +x cgminer
mv /usr/bin/cgminer /usr/bin/cgminer.bak
cp cgminer /usr/bin
/etc/init.d/cgminer.sh restart
There should be a more comprehensive merge in the future into mainline cgminer, hopefully by Kano. Bitmaintech has provided us both with S5s to support cgminer development.
Excellent ck!! Testing now, but I can already see an improvement with p2pool DOA/stale rate which I've been battling with since the start - it has halved. Many thanks ck & kano - hopefully you can figure out a way to make the binary change permanent soon, as the S5's require a reboot pretty often due to a firmware issue that makes one hash board drop off every other day.....
@ Bitmain: Any news on a firmware fix for this in the near future?
January 05, 2015, 06:16:05 AM
That's too bad, guess I'm spoiled by the S3 -- but again, thanks!
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