Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 105. (Read 528055 times)

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Better than Italian Bitcoin miners though.

I always said that Chinese stuff is the most poor in the world

fuck, I regret having bought 3X S7 Batch 8

did that start from the board or the pcie cables?

not mine, my friend's s7, not b8 though .. for your viewing pleasure :

I just made another set of orders for the B8s.  I really liked the B7s the best, but this is the only feasible option. 

Gotta GROW!!!

I have to agree with you on the B7 are the best batch.  Mine are running solid with the same type of numbers.

I just adjusted all of my S7's to 50% manual fan per your recommendation.  Two of my batch 8's also had to have their frequency reduced to get their temperature to 65 C or lower.  One of them I had to reduce the frequency to 650 MHz.  The other to 687 MHz.  I'm all about taking care of these rigs to hopefully increase longevity of the blades and the controller.  

EDIT:  The odd thing is the ambient is approximately 11 C.  Yet, two of them had to have their frequency lowered to reduce temperature.

I personally believe batch 7 was the best Batch of all the S7's.  At least from the one's I have.  I have Batch 1, Batch 5, Batch 7 and Batch 8.  My Batch 7 at factory 625 MHz is hashing at 5,055.92 GH/s with 0.0025% HWE's and fan at manual 50% with 3,600/3,350 RPM's on the fans with 54, 49, 48 temps on the blades.

my solution





The Lamptron CF525 is the spiritual successor to the FC2 classic and powerful. The CF525 provides a whooping 60w per channel through its five channels for a total of 300W for the power hungry. To put it in perspective, this controller is able to control 10x of the infamous fan Delta AFB1212GHE-CF00 at full speed, at the same time (2 per channel). These fans require 29.5W / 4.5A each, which is 24.5A / 295W draw in total! With CF525 we can safely say you will only ever need a system controller regardless of the number of cooling solutions you choose to use in terms of power needs. For your consideration, the Lamptron CF525. No Frills, just power.
TECHNICAL FEATURES:
Dimensions: 148.5 mm * 42.5 mm * 76 mm (5.25 "Bay)
Output power: Up to 60 watts per channel
control channels: 5 channels
Panel Available Color: Black anodized / Silver
DC input: + 12V (1pcs MOX4.2 5557-2 * 4p PCI-E 8 pin connectors Aka GPU).
DC Output: 12V DC 0V-
Connectors: 5 X 2510-3pin connectors / 8pin adapter 3xMolex)
Recommend PSU power: 700W or higher. And 'imperative that no multipliers are used to connect the molex molex adapter 3 suplied.
Characteristics
The most powerful of the controller on the market
60w per channel
High-quality materials
5 independent fully 60W / 5A channels
Other great features!
CNC milled aluminum face-plate
Cable Sleeves
Black PCB
No frills, just power
MSRP: $ 69.99 // € 59.99
Click here to download the user manual CF525

Here are the specs:

•   Dimension: 120x120x38mm
•   Weight: 128.5g
•   Double Ball Bearing
•   Rated voltage: DC12V
•   Rated current: 1.8±10%A
•   Rated input power: 21.6Watt
•   Operating voltage: 7 - 13．8V
•   Rated speed (range) 4450±10%RPM
•   Maximum air flow 186.2 CFM
•   Operating temperature: -10℃～+70℃
•   Life expectance: continuous operation 40,000 hours!

along these lines  100% fan speed  goes to about 4400rpm  don't use 100% ever.  Three reasons are:

1) power sucker uses the most power.
2) cooling improvements level off above 4200 rpm
3) much more likely to burn the controller out due to higher power use at 100%.



Also  The manual setting of 50% or greater will keep the miner safe from internet drop outs in most cases.

I think the stock fan is actually 250CFM. The Kaze wouldn't be good enough unless ambient is fairly low.

Be Careful with fans.  This fan that you are referencing is 133 CFM.  The fan on the S7 is 185 CFM.  It will be quieter, but provide less cooling.  You can also do this with the existing S7 fan by reducing the fan speed in the control panel "Miner Configuration - General Settings - Customize the fan speed percentage" by checking the box and entering the % into the box:

65% = 4120
60% = 3980
55%   =3840
50% = 3720
45% = 3480
40% = 3120
35% = 2760
30% = 2520
25% = 2500
20% = 2000

Hope this helps.

I have 4 of the Ultra Kaze fans.  They're very quiet and strong but I don't think they're anywhere as powerful as the S7 fans which can do up to 4500 RPM vs 3000RPM.  I'm using the Ultra Kaze to cool my IBM 2K PSU.  I think you can use it for the intake fan as you don't need 4500 RPM for that but I wouldn't recommend replacing both fans unless your operating environment will always be very cool temperature.   You can get a good idea by  manually setting the fan speed where the S7 drop to 2500-3000RPM or below (40% or less) and see how hot it runs.  If the S7 still runs within acceptable temperature range then the solution may work for you.  Just remember right now is winter so it's easier but once summer comes, things will change. 

Send J4bberwock a PM, he has them made up.


Rich

Has anyone tried Ultra Kaze on the S7 to compare noise and cooling performance vs stock? I'm wondering if this would be a good idea to pick up some Ultra Kaze.

http://www.frozencpu.com/products/21912/fan-378/Scythe_Ultra_Kaze_120mm_x_38mm_Fan_-_3000RPM_DFS123812H-3000.html

Woke up and found 1 S7 having network issues but the S7 is not beeping nor showing Red.  It wasnt a pool issue as it didn't failoever either.  Just not pingable and not hashing to the pool.  Had to reboot it to get it working again.  All lights were showing green just not blinking green on the controller.   Anyone seen similar issues?

that gradation reach?

http://www.dhgate.com/product/diy-air-condition-peltier-semiconductor-refrigeration/157539177.html#s1-2-7a;searl|2069004860
http://www.dhgate.com/product/diy-tec-peltier-semiconductor-refrigerator/206748781.html?recinfo=4,26,4#cpvhs-4-5|null:26

Some smaller options for cooling, but with high Wattage usage.