@philipma1957, or anyone with experience.
At this rate, since I'm using 600W'ish, can I run two SP20's off one (120v) EVGA 1300 G2? Safely? I recall you trying that somewhere in the thread, but don't remember the results, if any?
If so, how do I hook it up if I only have two more VGA red slots off the back?
Topic: Unofficial Spondoolies SP20 thread - page 26. (Read 126198 times)
white = normal speed
yellow = some under clock
blue = strong under clock
yellow = some under clock
blue = strong under clock
Here's the pic...
>snip image<
Can this be better?
>snip image<
Can this be better?
theoretically, but each machine has a "character', some better, some a little worse.
try this: limit power to each loop to 160w, then play with voltage (min and max)-this would be unique and different for your machine. let machine to adjust iself overnight or at least several hours as initially readings would be slightly lower.
For one machine I have:
Starting voltage:
0.64
0.64
0.639
0.639
max: 0.649
with fan 10 I get 1225-1231GH at 683w
Thanks! Much better (.57/GH).
Still tweaking. Trying to get your results, or better. As a side, I noticed the air flow is cooler now that the volts are lower.
Here are the current settings/results:
http://i.imgur.com/IOEccWR.png?1
What's the meaning of yellow hz? I read somewhere there's no need for worry, but I'm not sure what hz does/means. Do they need to be white, assuming white it normal?
Below is the result after leaving it over night. Temps 16 °C / 61,58 °C
http://i.imgur.com/TD07WzY.png?1
Here's the pic...
>snip image<
Can this be better?
>snip image<
Can this be better?
theoretically, but each machine has a "character', some better, some a little worse.
try this: limit power to each loop to 160w, then play with voltage (min and max)-this would be unique and different for your machine. let machine to adjust iself overnight or at least several hours as initially readings would be slightly lower.
For one machine I have:
Starting voltage:
0.64
0.64
0.639
0.639
max: 0.649
with fan 10 I get 1225-1231GH at 683w
How are you adding another SP20... they aren't even for sale anymore?
There are plenty still available in secondary markets. You'll still see plenty available for many months to come especially now the market is more stable.
Is there a list of secondary resellers?
I don't mean those who bought to resell, I mean those who bought, and are now selling
Plenty of SP20s over here https://bitcointalk.org/index.php?board=75.0 How are you adding another SP20... they aren't even for sale anymore?
There are plenty still available in secondary markets. You'll still see plenty available for many months to come especially now the market is more stable.
Is there a list of secondary resellers?
The new results are somewhere around 1150 hash and 700 watts.
this seems to be a bit low on hash for 700W
I agree. Suggestions?
How are you adding another SP20... they aren't even for sale anymore?
There are plenty still available in secondary markets. You'll still see plenty available for many months to come especially now the market is more stable.
The new results are somewhere around 1150 hash and 700 watts.
this seems to be a bit low on hash for 700W
Purchased last week. Just delivered today.
How are you adding another SP20... they aren't even for sale anymore?
After I posted that, I thought I could do better. The new results are somewhere around 1150 hash and 700 watts. I'll post new pic latter.
Cost is 8.66 cents to 9.33 cents.
I'm still tinkering until getting the most bang for buck. Suggestions welcome.
Also adding another Sp20 but need to get another evga 1300 g2 psu.
Cost is 8.66 cents to 9.33 cents.
I'm still tinkering until getting the most bang for buck. Suggestions welcome.
Also adding another Sp20 but need to get another evga 1300 g2 psu.
Just a suggestion, reducing the starting voltage on the hotter loops won't actually keep them cooler once they've stabilized. But, if you reduce the wattage on those two loops to keep the voltage slightly below the front chips, you can get away with less fan speed and not lose too much hashrate.
Not that there's anything wrong with your temps, but I see a lot of people doing this and I'm not entirely sure why. Maybe I'm wrong...
Not that there's anything wrong with your temps, but I see a lot of people doing this and I'm not entirely sure why. Maybe I'm wrong...
Dialed in pretty nicely. For now...
What do you pay for power?
[We don't cut corners (e.g. embedded controller, etc) and we use dc2dc which means that the BOM is higher.]
And I commend you for that, but I can also see why you are leaning towards sticking to larger form-factors for the future, where you don't have to even consider cutting corners in order to stay competitive and turn a profit. One thing that was clear from your SP20's is that you care about the quality of your product. It's a shame that the hardware becomes obsolete so quickly.
Is there any particular reason other than wanting to stick to a single model, rapid deployment for data-centers that you would not consider a larger form factor 3rd gen miner that requires external PSU('s)? For those on the small farm scale, it gives us an opportunity to save costs without being too much of a burden in setup.
I think the levels of support required for the home miners is also an issue, with people using myriad versions of psu's of variable levels of quality and the cost of just answering the support questions on home miners goes through the roof. Plus Israel isn't the cheapest place in the world to send stuff from. Plus they had a great niche with the rackmount 2U chassis miner, high density and great quality designed well for the DC. No-one was really doing anything like it. Whereas everyone was doing home miners and the competition is much fiercer and more cutthroat.
One of the biggest things is quality. The SP20's are rock solid with the metal case and I love them. I was running full blast since i got them. Now I have underclocked them. It is impressive to have such a wide range of power.
Also with them I never have had to babysit. It is pretty much set and forget until I want to change pools.
having had as many as 10 in house they are very good . I rate them just ahead of the avalon 4.1
mostly due to the many pool option you can have 8 in the pool queue .
Solid build .
With low clock at 800 gh high clock at 1500 gh.
Nice gear for sure.
[We don't cut corners (e.g. embedded controller, etc) and we use dc2dc which means that the BOM is higher.]
And I commend you for that, but I can also see why you are leaning towards sticking to larger form-factors for the future, where you don't have to even consider cutting corners in order to stay competitive and turn a profit. One thing that was clear from your SP20's is that you care about the quality of your product. It's a shame that the hardware becomes obsolete so quickly.
Is there any particular reason other than wanting to stick to a single model, rapid deployment for data-centers that you would not consider a larger form factor 3rd gen miner that requires external PSU('s)? For those on the small farm scale, it gives us an opportunity to save costs without being too much of a burden in setup.
I think the levels of support required for the home miners is also an issue, with people using myriad versions of psu's of variable levels of quality and the cost of just answering the support questions on home miners goes through the roof. Plus Israel isn't the cheapest place in the world to send stuff from. Plus they had a great niche with the rackmount 2U chassis miner, high density and great quality designed well for the DC. No-one was really doing anything like it. Whereas everyone was doing home miners and the competition is much fiercer and more cutthroat.
One of the biggest things is quality. The SP20's are rock solid with the metal case and I love them. I was running full blast since i got them. Now I have underclocked them. It is impressive to have such a wide range of power.
Also with them I never have had to babysit. It is pretty much set and forget until I want to change pools.
[We don't cut corners (e.g. embedded controller, etc) and we use dc2dc which means that the BOM is higher.]
And I commend you for that, but I can also see why you are leaning towards sticking to larger form-factors for the future, where you don't have to even consider cutting corners in order to stay competitive and turn a profit. One thing that was clear from your SP20's is that you care about the quality of your product. It's a shame that the hardware becomes obsolete so quickly.
Is there any particular reason other than wanting to stick to a single model, rapid deployment for data-centers that you would not consider a larger form factor 3rd gen miner that requires external PSU('s)? For those on the small farm scale, it gives us an opportunity to save costs without being too much of a burden in setup.
I think the levels of support required for the home miners is also an issue, with people using myriad versions of psu's of variable levels of quality and the cost of just answering the support questions on home miners goes through the roof. Plus Israel isn't the cheapest place in the world to send stuff from. Plus they had a great niche with the rackmount 2U chassis miner, high density and great quality designed well for the DC. No-one was really doing anything like it. Whereas everyone was doing home miners and the competition is much fiercer and more cutthroat.
Jump to: