i think i did enough tests:
https://bitcointalksearch.org/topic/m.10016431
Topic: [Review 1] A Spondoolies-Tech Sp20 in Italy (Read 6170 times)
Why didn't you try something more:
1029 Ghs @
T front/back: 20 /44
Start volt /max volt: 0.32/0.625
Max watt: 150
1029 Ghs @
T front/back: 20 /44
Start volt /max volt: 0.32/0.625
Max watt: 150
some of my test:
Mining Rate: 855.96Ghs
Temp Front / Back T,B 15 °C / 31,30 °C
Fan Speed 50
Start Voltage 0.6 / 0.6 / 0.6 / 0.6
Max Voltage 0.61
Wall wattage 425
Mining Rate: 770.07Ghs
Temp Front / Back T,B 14 °C / 29,28 °C
Fan Speed 40
Start Voltage 0.58 / 0.58 / 0.58 / 0.58
Max Voltage 0.6
Wall wattage 380
125w for each connector is more than fine!
thou i would do my best to push the miner to the max to recuperate the money invested....
Mining Rate: 855.96Ghs
Temp Front / Back T,B 15 °C / 31,30 °C
Fan Speed 50
Start Voltage 0.6 / 0.6 / 0.6 / 0.6
Max Voltage 0.61
Wall wattage 425
Mining Rate: 770.07Ghs
Temp Front / Back T,B 14 °C / 29,28 °C
Fan Speed 40
Start Voltage 0.58 / 0.58 / 0.58 / 0.58
Max Voltage 0.6
Wall wattage 380
125w for each connector is more than fine!
thou i would do my best to push the miner to the max to recuperate the money invested....
Hello would it be possible in your opinion to drive 2x SP20 with a 1200 gold PSU (100A)
In detail at 1000 GH and 500w each => circa 125watt per connector (1000watt/8)
1000watt over the 12volt rail equals to 1000watt/12v = 84 A < 100 A
what about it?
too much 125 watt for each 6 pin pci connector?
In detail at 1000 GH and 500w each => circa 125watt per connector (1000watt/8)
1000watt over the 12volt rail equals to 1000watt/12v = 84 A < 100 A
what about it?
too much 125 watt for each 6 pin pci connector?
So if I can't go faster, let's try to go cheaper 
I've attached my unit to a Cooler Master V1000 PSU, 80+ gold and around 91% efficient at this load and I've limited chip voltages to 0.665 volts, without touching max watts per board, as per Spoondolies Tech recommendations.
And here what I can get, 1305 GH at 700 W, fan slowed down to 40% and chips nicely warm (intake at 22 because I'm back inside my mom's garage).
I'll leave it hashing at 0.536 J/GH for the time being, or at least until after Christmas time.
spiccioli
I've attached my unit to a Cooler Master V1000 PSU, 80+ gold and around 91% efficient at this load and I've limited chip voltages to 0.665 volts, without touching max watts per board, as per Spoondolies Tech recommendations.
And here what I can get, 1305 GH at 700 W, fan slowed down to 40% and chips nicely warm (intake at 22 because I'm back inside my mom's garage).
I'll leave it hashing at 0.536 J/GH for the time being, or at least until after Christmas time.
spiccioli
Yesterday I made a couple more tests after running it for a week at 1.5 Th and 1000W during the paycoin frenzy
First of all I did try to push it to the maximum, having a 1600 W PSU I though I could go higher than 1.7 Th, but alas I could not.
Intake temperature as reported by miner's interface is higher than environment's real one, I was in a 10 ° C as this old analog thermometer shows
but miner's reported temperature was at 16 ° C and increasing
At 1667 GH I was using around 1280 W on a 220V outlet with my Recom M1600 PSU (85% efficient)
1670 GH is as fast as it can go, in a 10 ° C environment, because of thermal throttling by the chips, which were not able to remain below 125C even at 100% fan speed.
In his review johnyj is doing some great mods to better cool all of the chips and so avoid thermal throttling, let's see what he can get.
spiccioli
First of all I did try to push it to the maximum, having a 1600 W PSU I though I could go higher than 1.7 Th, but alas I could not.
Intake temperature as reported by miner's interface is higher than environment's real one, I was in a 10 ° C as this old analog thermometer shows
but miner's reported temperature was at 16 ° C and increasing
At 1667 GH I was using around 1280 W on a 220V outlet with my Recom M1600 PSU (85% efficient)
1670 GH is as fast as it can go, in a 10 ° C environment, because of thermal throttling by the chips, which were not able to remain below 125C even at 100% fan speed.
In his review johnyj is doing some great mods to better cool all of the chips and so avoid thermal throttling, let's see what he can get.
spiccioli
i like the background stories, these are little snippets of people's lives that we very rarely get to read, it kinda puts a persona behind the usernames. thanks for sharing.
My pleasure!
spiccioli
i like the background stories, these are little snippets of people's lives that we very rarely get to read, it kinda puts a persona behind the usernames. thanks for sharing.
I've added the background section and a photo of my first units never shown before in the Interwebs!
spiccioli
spiccioli
Awesome
more pics please .. 
I will alter my links to reflect you are the first review posted
https://bitcointalksearch.org/topic/m.9645864
I've added the background section and a photo of my first units never shown before in the Interwebs!
spiccioli
spiccioli
Their aren't any fans that can push the amount of air needed to keep them cool enough to hit their target speed, AND keep quiet.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
I'd say part of the sound comes from fan's vibrations amplified by Sp20's case.
I did not check whether the fan has spacers/silencers (I'm not sure how to call them) between itself and the case.
spiccioli
Unfortunately the fan sounds like that even outside the case.
Their aren't any fans that can push the amount of air needed to keep them cool enough to hit their target speed, AND keep quiet.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
mine is in the room next to my lounge, when the wife gets home from work, I drop the power down and fan speed to 40, it's not so bad, can only just hear it and tv noise drowns it out easily.
to be fair, if you adhere to philipma1957's downclocking specs, it's a far more efficient miner <0.55w/GH - it's pretty much equal to my SP31, which does 0.53w/GH on stock settings.
note: the SP31 is NOT in the 2nd lounge room next door!
Their aren't any fans that can push the amount of air needed to keep them cool enough to hit their target speed, AND keep quiet.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
I'd say part of the sound comes from fan's vibrations amplified by Sp20's case.
I did not check whether the fan has spacers/silencers (I'm not sure how to call them) between itself and the case.
spiccioli
Their aren't any fans that can push the amount of air needed to keep them cool enough to hit their target speed, AND keep quiet.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
But you can run them in ultra low power mode and still get great results, sound wise at 40% the fans aren't so bad.
No comment on how absurdly loud they are? What's your reading on that?
It is definitely loud when running at full speed.
With my iphone and an app (I don't know how accurate it can be) I've read 78 db at a couple of meters from the fan with fan at 90%.
I've not yet downclocked it, so I can't say how much more silent it can be, but at 80 or 90% fan you better keep it outside your house/room.
spiccioli
just for you koontas, Spondoolies have reduced their prices yet again.
you're welcome.
you're welcome.
No comment on how absurdly loud they are? What's your reading on that?
...
First of all, you need to know that my nickname and Spondoolies... mean nearly the same, pocket change my nickname and a (bigger) cash sum theirs.
...
First of all, you need to know that my nickname and Spondoolies... mean nearly the same, pocket change my nickname and a (bigger) cash sum theirs.
...
Great pictures.
Thanks,
I'm glad you like them.
spiccioli
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